WO2001029220A2 - Mage-a12 antigenic peptides and uses thereof - Google Patents
Mage-a12 antigenic peptides and uses thereof Download PDFInfo
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- WO2001029220A2 WO2001029220A2 PCT/US2000/028852 US0028852W WO0129220A2 WO 2001029220 A2 WO2001029220 A2 WO 2001029220A2 US 0028852 W US0028852 W US 0028852W WO 0129220 A2 WO0129220 A2 WO 0129220A2
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Classifications
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
- C07K14/4701—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals not used
- C07K14/4748—Tumour specific antigens; Tumour rejection antigen precursors [TRAP], e.g. MAGE
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
- A61P35/00—Antineoplastic agents
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
- A61K2039/51—Medicinal preparations containing antigens or antibodies comprising whole cells, viruses or DNA/RNA
- A61K2039/515—Animal cells
- A61K2039/5154—Antigen presenting cells [APCs], e.g. dendritic cells or macrophages
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
Definitions
- This invention relates to polypeptides and encoded nucleic acid molecules which are expressed preferentially in tumors, including melanomas, bladder carcinomas, renal carcinomas, lung carcinomas, esophageal carcinomas, etc.
- the nucleic acid molecules and encoded polypeptides are useful in, inter alia, diagnostic and therapeutic contexts.
- tumor associated genes are markers for the tumor phenotype.
- the expression of tumor associated genes can also be an essential event in the process of tumorigenesis.
- the host recognizes as foreign the tumor associated genes which are not expressed in normal non-tumorigenic cells.
- the expression of tumor associated genes can provoke an immune response against the tumor cells by the host.
- Tumor associated genes can also be expressed in normal cells within certain tissues without provoking an immune response.
- immunologically privileged tissues include brain and testis.
- tumor associated expression of a gene provides a means of identifying a cell as a tumor cell. Diagnostic compounds can be based on the tumor associated gene, and used to determine the presence and location of tumor cells. Further, when the tumor associated gene contributes to an aspect of the tumor phenotype (e.g., unregulated growth or metastasis), the tumor associated gene can be used to provide therapeutics such as antisense nucleic acids which can reduce or substantially eliminate expression of that gene, thereby reducing or substantially eliminating the phenotypic aspect which depends on the expression of the particular tumor associated gene.
- therapeutics such as antisense nucleic acids which can reduce or substantially eliminate expression of that gene, thereby reducing or substantially eliminating the phenotypic aspect which depends on the expression of the particular tumor associated gene.
- the process by which the mammalian immune system recognizes and reacts to foreign or alien materials is a complex one.
- An important facet of the system is the T cell response. This response requires that T cells recognize and interact with complexes of cell surface molecules, referred to as human leukocyte antigens ("HLA”), or major histocompatibility complexes ("MHCs”), and peptides.
- HLA human leukocyte antigens
- MHCs major histocompatibility complexes
- peptides are derived from larger molecules which are processed by the cells which also present the HLA/MHC molecule. See in this regard Male et al., Advanced Immunology (J.P. Lipincott Company, 1987), especially chapters 6-10.
- T cells and complexes of HLA/peptide are restricted, requiring a T cell specific for a particular combination of an HLA molecule and a peptide. If a specific T cell is not present, there is no T cell response even if its partner complex is present. Similarly, there is no response if the specific complex is absent, but the T cell is present.
- the mechanism is involved in the immune system's response to foreign materials, in autoimmune pathologies, and in responses to cellular abnormalities. Much work has focused on the mechanisms by which proteins are processed into the HLA binding peptides.
- T cells recognize cellular abnormalities has also been implicated in cancer.
- PCT application PCT US92/04354 filed May 22, 1992, published on November 26, 1992, and inco ⁇ orated by reference, a family of genes is disclosed, which are processed into peptides which, in turn, are expressed on cell surfaces, which can lead to lysis of the tumor cells by specific CTLs.
- the genes are said to code for "tumor rejection antigen precursors” or "TRAP" molecules, and the peptides derived therefrom are referred to as "tumor rejection antigens" or "TRAs". See Traversari et al., J. Exp. Med.
- tyrosinase is described as a tumor rejection antigen precursor.
- This reference discloses that a molecule which is produced by some normal cells (e.g., melanocytes), is processed in tumor cells to yield a tumor rejection antigen that is presented by HLA-A2 molecules.
- a second TRA not derived from tyrosinase is taught to be presented by HLA-A2 molecules.
- the TRA is derived from a TRAP, but is coded for by a known MAGE gene. This disclosure shows that a particular HLA molecule may present TRAs derived from different sources.
- TRAPs are disclosed in US. Patent Nos. 5,571,711, 5,610,013, 5,587,289 and 5,589,334, as well as PCT publication WO96/10577.
- the TRAPs are processed to tumor rejection antigens, which are presented by a variety of HLA molecules.
- an isolated MAGE-A12 HLA class I- binding peptide includes the amino acid sequence of SEQ ID NO:6, or a functional variant thereof which binds HLA class I molecules.
- the functional variant includes one or more amino acid additions, substitutions or deletions.
- the isolated MAGE-A12 HLA class I-binding peptide includes an amino acid sequence selected from the group consisting of SEQ ID NO:4, SEQ ID NO:5, fragments thereof, and functional variants thereof.
- the isolated peptide consists of an amino acid sequence selected from the group consisting of SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6, fragments thereof, and functional variants thereof.
- the isolated MAGE-A12 HLA class I-binding peptide preferably is not the full length MAGE-A12 polypeptide sequence.
- an isolated MAGE-A12 HLA class I binding peptide which includes a fragment of the amino acid sequence of SEQ ID NO:2 which binds HLA Cw*07, or a functional variant thereof.
- the functional variant includes one or more amino acid additions, substitutions or deletions.
- the functional variant binds HLA Cw*07.
- Preferred embodiments include SEQ ID NO:3, SEQ ID NO:4, SEQ ID NO:5, and SEQ ID NO:6.
- the foregoing isolated MAGE-A12 HLA class I-binding peptides are non-hydrolyzable.
- the non-hydrolyzable peptide is selected from the group consisting of peptides comprising D-amino acids, peptides comprising a -psi[CH 2 NH]-reduced amide peptide bond, peptides comprising a -psi[COCH 2 ]-ketomethylene peptide bond, peptides comprising a -psi[CH(CN)NH]-(cyanomethylene)amino peptide bond, peptides comprising a - psi[CH 2 CH(OH)]-hydroxyethylene peptide bond, peptides comprising a -psi[CH 2 O]-peptide bond, and peptides comprising a -psi[CH 2 S]-thiomethylene peptide bond.
- compositions including the foregoing isolated MAGE-A12 HLA class I-binding peptides and one or more isolated HLA class I- or class II-binding peptides of non-MAGE-A12 tumor antigens.
- MAGE-A12 HLA class I-binding peptides and the non-MAGE-A12 HLA binding peptides are combined as a polytope polypeptide.
- isolated nucleic acids encoding the foregoing peptides are provided. The nucleic acids do not encode full length MAGE-A12. In certain embodiments, the nucleic acids comprise a fragment of the nucleotide sequence of SEQ ID NO:l .
- Expression vectors are also provided according to the invention.
- the expression vectors include the isolated foregoing nucleic acids operably linked to a promoter.
- the expression vectors also include a nucleic acid which encodes an HLA-Cw*07 molecule.
- host cells transfected or transformed with the foregoing nucleic acids or expression vectors are provided.
- the host cells also express an HLA-Cw*07 molecule.
- methods for enriching selectively a population of T lymphocytes with T lymphocytes specific for a MAGE-A12 HLA binding peptide include contacting a source of T lymphocytes which contains a population of T lymphocytes with an agent presenting a complex of the MAGE- A12 HLA binding peptide and an HLA molecule in an amount sufficient to selectively enrich the population of T lymphocytes with the T lymphocytes specific for a MAGE-A12 HLA binding peptide.
- the agent is an antigen presenting cell contacted with a MAGE-A12 protein or an HLA binding fragment thereof.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii).
- methods for diagnosing a disorder characterized by expression of MAGE -A 12 include contacting a biological sample isolated from a subject with an agent that is specific for a MAGE-A12 HLA binding peptide, and determining the interaction between the agent and the MAGE-A12 HLA binding peptide as a determination of the disorder.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii).
- methods for diagnosing a disorder characterized by expression of a MAGE-A12 HLA binding peptide include contacting a biological sample isolated from a subject with an agent that binds the complex and determining binding between the complex and the agent as a determination of the disorder.
- the MAGE-A12 HLA binding peptide is selected from the group consisting (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii).
- methods for treating a subject having a disorder characterized by expression of MAGE-A12 include administering to the subject an amount of a MAGE-A12 HLA binding peptide sufficient to ameliorate the disorder.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii).
- methods for treating a subject having a disorder characterized by expression of MAGE- Al 2 include administering to the subject an amount of a composition which included an isolated MAGE- A12 HLA class I-binding peptide and an isolated HLA class I- or class II-binding peptide of a non-MAGE-A12 tumor antigen sufficient to ameliorate the disorder.
- methods for treating a subject having a disorder characterized by expression of MAGE-A12 include administering to the subject an amount of an agent which enriches selectively in the subject the presence of complexes of an HLA molecule and a MAGE-A12 HLA binding peptide, sufficient to ameliorate the disorder.
- the agent includes a MAGE- A12 HLA binding peptide.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii).
- methods for treating a subject having a disorder characterized by expression of MAGE-A12 are provided. The methods include administering to the subject an amount of autologous T lymphocytes sufficient to ameliorate the disorder, wherein the T lymphocytes are specific for complexes of an HLA molecule and a MAGE-A12 HLA binding peptide.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii). Also provided according to another aspect of the invention are methods for identifying functional variants of a MAGE-A12 HLA binding peptide.
- the methods include selecting a MAGE-A12 HLA binding peptide, an HLA binding molecule which binds the MAGE-A12 HLA class I binding peptide, and a T cell which is stimulated by the MAGE-A12 HLA binding peptide presented by the HLA binding molecule; mutating a first amino acid residue of the MAGE-A12 HLA binding peptide to prepare a variant peptide; and determining the binding of the variant peptide to HLA binding molecule and the stimulation of the T cell, wherein binding of the variant peptide to the HLA binding molecule and stimulation of the T cell by the variant peptide presented by the HLA binding molecule indicates that the variant peptide is a functional variant.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, and (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6.
- the methods include the step of comparing the stimulation of the T cell by the MAGE-A12 HLA binding peptide and the stimulation of the T cell by the functional variant as a determination of the effectiveness of the stimulation of the T cell by the functional variant. Also provided are isolated functional variants of a MAGE-A12 HLA binding peptide identified by the methods.
- isolated polypeptides are provided which bind selectively the foregoing MAGE-A12 HLA binding peptides, provided that the isolated polypeptides are not HLA molecules.
- the isolated polypeptides are antibodies, preferably monoclonal antibodies.
- the isolated polypeptides are antibody fragments selected from the group consisting of Fab fragments, F(ab) 2 fragments or fragments including a CDR3 region selective for a MAGE- A12 HLA binding peptide.
- isolated T lymphocytes which selectively bind a complex of an HLA molecule and. a MAGE-A12 HLA binding peptide are provided.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii).
- isolated antigen presenting cells which include a complex of an HLA molecule and a MAGE-A12 HLA binding peptide are provided.
- the MAGE-A12 HLA binding peptide is selected from the group consisting of (i) peptides which consist of a fragment of the amino acid sequence of SEQ ID NO:2, (ii) peptides which comprise the amino acid sequence of SEQ ID NO:6, and (iii) functional variants of the peptides of (i) and (ii).
- methods for identifying a candidate mimetic of a MAGE-A12 HLA binding peptide are provided.
- the methods include providing a HLA molecule which binds the MAGE-A12 HLA binding peptide, contacting the HLA molecule with a test molecule, and determining the binding of the test molecule to the HLA molecule, wherein a test molecule which binds to the HLA molecule is a candidate mimetic of the MAGE-A12 HLA binding peptide.
- the methods include forming a complex of the HLA molecule and the candidate mimetic, contacting the complex with a T cell which binds to a complex of an HLA molecule and the MAGE-A12 HLA binding peptide, and assaying activation of the T cell.
- activation of the T cell is indicated by a property selected from the group consisting of proliferation of the T cell, interferon- ⁇ production by the T cell, tumor necrosis factor production by the T cell, and cytolysis of a target cell by the T cell.
- vaccine compositions are provided.
- the vaccine compositions can include the foregoing MAGE-A12 HLA binding peptides, the foregoing T lymphocytes, the foregoing antigen presenting cells, and/or the foregoing isolated nucleic acid molecules.
- the foregoing vaccine compositions include an adjuvant and/or a pharmaceutically acceptable carrier.
- protein microarrays that include one or more isolated MAGE-A12 HLA class I-binding peptides, or functional variants thereof that bind HLA class I molecules.
- the functional variants include one or more amino acid additions, substitutions or deletions.
- the isolated MAGE-A12 HLA class I-binding peptides include the amino acid sequence of SEQ ID NO:6.
- the isolated MAGE-A12 HLA class I-binding peptides include an amino acid sequence selected from the group consisting of SEQ ID NO:4, SEQ ID NO:5, and functional variants thereof.
- the diagnostic methods include contacting the protein microarray with a biological sample isolated from a subject suspected of having the disorder, and determining the binding of a constituent of the biological sample to the isolated MAGE- A12 HLA class I binding peptide.
- the constituent of the biological sample is selected from the group consisting of an antibody, a T lymphocyte, and a HLA molecule.
- the disorder is cancer.
- the invention also provides pharmaceutical preparations containing any one or more of the compositions described herein.
- Such pharmaceutical preparations can include pharmaceutically acceptable diluent carriers or excipients.
- the use of such compositions in the preparation of medicaments, particularly medicaments for the treatment of cancer also is provided.
- the HLA molecule preferably is HLA Cw*07 and more preferably is HLA Cw*0701.
- Disorders as used herein include cancers, such as bladder carcinomas, melanomas, esophageal carcinomas, lung carcinomas, head and neck carcinomas, breast carcinomas, colorectal carcinomas, myelomas, brain tumors, sarcomas, prostate carcinomas and renal carcinomas.
- Fig. 1 depicts the recognition of autologous and allogeneic HLA-Cw*07-positive tumor cell lines by CTL 501D/19: (A) lysis, (B) TNF release.
- Fig. 2 shows that CTL 501D/19 recognizes an antigen encoded by MAGE-12 and presented by HLA-Cw7.
- Fig. 3 shows the identification of the MAGE-A12 region coding for the antigenic peptide recognized by CTL 501D/19.
- Fig. 4 depicts lysis by CTL 501D/19 of the autologous cell line LB-831-EBV pulsed with MAGE-12 peptides VRIGHLYIL (SEQ ID NO:4) and RIGHLYIL (SEQ ID NO:6).
- the invention provides isolated MAGE-A12 peptides, some of which are presented by HLA class I molecules, which peptides stimulate the proliferation and activation of CD8 + T lymphocytes.
- Such peptides are referred to herein as "MAGE-A12 immunogenic polypeptides” and “MAGE-A12 HLA class I binding peptides” and “MAGE-A12 HLA peptides", and the like.
- one aspect of the invention is an isolated peptide which includes the amino acid sequence of SEQ ID NO:6.
- peptides which are MAGE-Al 2 HLA binding peptides.
- These exemplary peptides are processed translation products of the nucleic acid of SEQ ID NO: 1.
- the translation products from which a MAGE-Al 2 immunogenic polypeptide is processed to a final form for presentation may be of any length or sequence so long as they encompass an HLA binding peptide.
- the HLA binding peptides include a MAGE-Al 2 HLA binding peptide having an amino acid sequence as set forth in SEQ ID NOs:4, 5 or 6.
- peptides or proteins as small as 8 amino acids are appropriately processed, presented by HLA class I molecules and effective in stimulating CD8 + T lymphocytes.
- the peptide of SEQ ID NOs:4, 5 or 6 may have one, two, three, four, five, six, seven, eight, nine, ten, or more amino acids added to either or both ends.
- the added amino acids can co ⁇ espond to the MAGE-Al 2 polypeptide (SEQ ID NO:2), or can be unrelated.
- the antigenic portion of such a peptide is cleaved out under physiological conditions for presentation by HLA class I molecules.
- HLA binding peptides derived from the MAGE-Al 2 polypeptide may provoke an immune response when presented by HLA Cw*07 molecules.
- the invention embraces all such immunogenic fragments of the MAGE-Al 2 polypeptide.
- a "functional variant” or “variant" of a MAGE-Al 2 HLA binding peptide is a molecule which contains one or more modifications to the primary amino acid sequence of the MAGE-Al 2 HLA binding peptide and retains the HLA class I binding properties disclosed herein, as well as the ability to stimulate proliferation and/or activation of CD8 + T lymphocytes.
- Modifications which create a MAGE-Al 2 immunogenic polypeptide functional variant can be made for example 1) to enhance a property of a MAGE-A12 HLA binding peptide, such as peptide stability in an expression system or the stability of protein- protein binding such as HLA-peptide binding; 2) to provide a novel activity or property to a MAGE-Al 2 immunogenic polypeptide, such as addition of an antigenic epitope or addition of a detectable moiety; or 3) to provide a different amino acid sequence that produces the same or similar T cell stimulatory properties.
- Modifications to a MAGE-A12 HLA binding peptide can be made to a nucleic acid which encodes the peptide, and can include deletions, point mutations, truncations, amino acid substitutions and additions of amino acids. Alternatively, modifications can be made directly to the polypeptide, such as by cleavage, addition of a linker molecule, addition of a detectable moiety, such as biotin, addition of a fatty acid, substitution of one amino acid for another and the like. Modifications also embrace fusion proteins comprising all or part of the MAGE-Al 2 immunogenic polypeptide amino acid sequence.
- the amino acid sequence of MAGE-Al 2 immunogenic polypeptides may be of natural or non-natural origin, that is, they may comprise a natural MAGE-Al 2 immunogenic polypeptide molecule or may comprise a modified sequence as long as the amino acid sequence retains the ability to stimulate cytolytic T cells when presented and retains the property of binding to an HLA class I molecule such as an HLA Cw*07 molecule.
- MAGE-Al 2 immunogenic polypeptides in this context may be fusion proteins of a MAGE-Al 2 HLA binding peptide and unrelated amino acid sequences, synthetic peptides of amino acid sequences shown in SEQ ID NOs:4, 5, and 6, labeled peptides, peptides isolated from patients with a MAGE-Al 2 expressing cancer, peptides isolated from cultured cells which express MAGE-A12, peptides coupled to nonpeptide molecules (for example in certain drug delivery systems) and other molecules which include the amino acid sequence of SEQ ID NO:6.
- MAGE-Al 2 HLA binding peptides are non-hydrolyzable.
- MAGE-A12 HLA binding peptides from a library of non- hydrolyzable peptides, such as peptides containing one or more D-amino acids or peptides containing one or more non-hydrolyzable peptide bonds linking amino acids.
- a library of non- hydrolyzable peptides such as peptides containing one or more D-amino acids or peptides containing one or more non-hydrolyzable peptide bonds linking amino acids.
- peptides may be labeled and incubated with cell extracts or purified proteases and then isolated to determine which peptide bonds are susceptible to proteolysis, e.g., by sequencing peptides and proteolytic fragments.
- potentially susceptible peptide bonds can be identified by comparing the amino acid sequence of a MAGE-Al 2 immunogenic polypeptide with the known cleavage site specificity of a panel of proteases. Based on the results of such assays, individual peptide bonds which are susceptible to proteolysis can be replaced with non-hydrolyzable peptide bonds by in vitro synthesis of the peptide.
- Non-hydrolyzable bonds include -psi[CH 2 NH]- reduced amide peptide bonds, -psi[COCH 2 ]- ketomethylene peptide bonds, -psi[CH(CN)NH]- (cyanomethylene)amino peptide bonds, -psi[CH 2 CH(OH)]- hydroxyethylene peptide bonds, -psi[CH 2 O]- peptide bonds, and -psi[CH 2 S]- thiomethylene peptide bonds.
- Nonpeptide analogs of peptides are also contemplated.
- Peptide mimetic analogs can be prepared based on a selected MAGE-Al 2 HLA binding peptide by replacement of one or more residues by nonpeptide moieties.
- the nonpeptide moieties permit the peptide to retain its natural confirmation, or stabilize a prefe ⁇ ed, e.g., bioactive, confirmation.
- One example of methods for preparation of nonpeptide mimetic analogs from peptides is described in Nachman et al., Regul Pept. 57:359-370 (1995).
- Peptide mimetics also can be selected from libraries of synthetic compounds (e.g. combinatorial libraries of small organic molecules) or natural molecules according to the HLA binding properties and/or T cell stimulatory properties of such molecule.
- Assays for identification of mimetics of a MAGE - A12 immunogenic polypeptide from libraries such as binding assays are well known in the art.
- Peptide as used herein embraces all of the foregoing.
- a variant involves a change to an amino acid of a MAGE-A12 immunogenic polypeptide (e.g., SEQ ID NOs:4, 5 or 6)
- functional variants of the MAGE-A12 immunogenic polypeptide having conservative amino acid substitutions typically will be prefe ⁇ ed, i.e., substitutions which retain a property of the original amino acid such as charge, hydrophobicity, conformation, etc.
- conservative substitutions of amino acids include substitutions made amongst amino acids within the following groups: (a) M, I, L, V; (b) F, Y, W; (c) K, R, H; (d) A, G; (e) S, T; (f) Q, N; and (g) E, D.
- a motif might specify that the residue at a first position may be any one of the residues valine, leucine, isoleucine, methionine, or phenylalanine; that the residue at the second position must be histidine; that the residue at the third position may be any amino acid residue; that the residue at the fourth position may be any one of the residues valine, leucine, isoleucine, methionine, phenylalanine, tyrosine or tryptophan; and that the residue at the fifth position must be lysine.
- Sequence motifs for MAGE-Al 2 HLA binding peptide functional variants can be developed by analysis of the binding domains or binding pockets of major histocompatibility complex HLA-Cw proteins and/or the T cell receptor ("TCR") contact points of the MAGE- Al 2 immunogenic polypeptides disclosed herein.
- TCR T cell receptor
- HLA peptide binding predictions made according to established rules for binding potential (e.g., Parker et al, J. Immunol. 152:163, 1994; Rammensee et al., Immunogenetics 41 :178-228, 1995).
- HLA binding predictions can conveniently be made using an algorithm available via the Internet on the National Institutes of Health World Wide Web site at URL http://bimas.dcrt.nih.gov.
- the methods include selecting a MAGE-Al 2 HLA binding peptide, an HLA class I binding molecule which binds the MAGE-A12 HLA binding peptide, and a T cell which is stimulated by the MAGE-Al 2 HLA binding peptide presented by the HLA class I binding molecule.
- the MAGE-Al 2 immunogenic polypeptide comprises the amino acid sequence of SEQ ID NO:6. More preferably, the peptide consists of the amino acid sequence of SEQ ID NO:4, SEQ ID NO:5, or SEQ ID NO:6. A first amino acid residue of the MAGE-Al 2 HLA binding peptide is mutated to prepare a variant peptide.
- the amino acid residue can be mutated according to the principles of HLA and T cell receptor contact points set forth above. Any method for preparing variant peptides can be employed, such as synthesis of the variant peptide, recombinantly producing the variant peptide using a mutated nucleic acid molecule, and the like.
- the binding of the variant peptide to HLA class I binding molecule and/or stimulation of the T cell are then determined according to standard procedures.
- the variant peptide can be contacted with an antigen presenting cell which contains the HLA class I molecule which binds the MAGE-Al 2 HLA binding peptide to form a complex of the variant peptide and antigen presenting cell.
- This complex can then be contacted with a T cell which recognizes the MAGE-Al 2 HLA binding peptide presented by the HLA class I binding molecule.
- T cells can be obtained from a patient having a condition characterized by expression of MAGE-Al 2. Recognition of variant peptides by the T cells can be determined by measuring an indicator of T cell stimulation such as TNF or IFN ⁇ production.
- Binding of the variant peptide to the HLA class I binding molecule and/or stimulation of the T cell by the variant peptide presented by the HLA class I binding molecule indicates that the variant peptide is a functional variant.
- the methods also can include the step of comparing the stimulation of the T cell by the MAGE-Al 2 HLA binding peptide and the stimulation of the T cell by the functional variant as a determination of the effectiveness of the stimulation of the T cell by the functional variant. By comparing the functional variant with the MAGE-Al 2 HLA binding peptide, peptides with increased T cell stimulatory properties can be prepared.
- Variants of the MAGE-Al 2 HLA binding peptides prepared by any of the foregoing methods can be sequenced, if necessary, to determine the amino acid sequence and thus deduce the nucleotide sequence which encodes such variants.
- nucleic acid sequences which code for a MAGE-Al 2 immunogenic polypeptide or variant thereof, including allelic variants are also a part of the invention.
- a nucleic acid hybridization such as a Southern blot or a Northern blot may be performed under stringent conditions, together with a 32 P probe.
- stringent conditions refers to parameters with which the art is familiar. Nucleic acid hybridization parameters may be found in references which compile such methods, e.g. Molecular Cloning: A Laboratory Manual, J. Sambrook, et al., eds., Second Edition, Cold Spring Harbor
- Exemplary stringent conditions include hybridization at 65°C in hybridization buffer (3.5 x SSC, 0.02% Ficoll, 0.02% Polyvinyl pyrolidone, 0.02% Bovine Serum Albumin, 25mM NaH 2 PO 4 (pH7), 0.5% SDS, 2mM EDTA).
- SSC is 0.15M Sodium Chloride/0.015M Sodium Citrate, pH 7;
- SDS is Sodium Dodecyl Sulphate; and
- EDTA is Ethylene diaminetetraacetic acid.
- the membrane upon which the DNA is transfe ⁇ ed can be washed, for example, at 2xSSC at room temperature and then at 0.1 - 0.5x SSC/0.1 x SDS at temperatures up to 68°C. After washing the membrane to which DNA encoding a MAGE-Al 2 immunogenic polypeptide was finally transfe ⁇ ed, the membrane can be placed against X-ray film to detect the radioactive signal.
- the invention also includes the use of nucleic acid sequences which include alternative codons that encode the same amino acid residues of the MAGE-Al 2 immunogenic polypeptides.
- the peptide VRIGHLYIL (SEQ ID NO:4) is a MAGE-A12 HLA binding peptide.
- the leucine residues can be encoded by the codons CUA, CUC, CUG, CUU, UUA and UUG. Each of the six codons is equivalent for the pu ⁇ oses of encoding a leucine residue.
- nucleotide sequence triplets which encode other amino acid residues comprising the MAGE-Al 2 HLA binding peptide of SEQ ID NO:4 include: GUA, GUC, GUG and GUU (valine codons); GGU, GGA, GGG, GGC (glycine codons); UAC and UAU (tyrosine codons).
- Other amino acid residues may be encoded similarly by multiple nucleotide sequences.
- the invention embraces degenerate nucleic acids that differ from the native MAGE-Al 2 immunogenic polypeptide encoding nucleic acids in codon sequence due to the degeneracy of the genetic code.
- MAGE-Al 2 polypeptides are those which preferentially express MAGE-Al 2 immunogenic polypeptides, such as the HLA binding peptide described herein.
- the MAGE-Al 2 nucleic acids of the invention do not encode the entire MAGE-Al 2 polypeptide but do include nucleotide sequences encoding the MAGE- Al 2 HLA binding peptide.
- the invention also provides modified nucleic acid molecules which include additions, substitutions and deletions of one or more nucleotides.
- these modified nucleic acid molecules and/or the polypeptides they encode retain at least one activity or function of the unmodified nucleic acid molecule and/or the polypeptides, such as antigenicity, enzymatic activity, receptor binding, formation of complexes by binding of peptides by MHC class I and class II molecules, etc.
- the modified nucleic acid molecules encode modified polypeptides, preferably polypeptides having conservative amino acid substitutions as are described elsewhere herein.
- modified nucleic acid molecules are structurally related to the unmodified nucleic acid molecules and in prefe ⁇ ed embodiments are sufficiently structurally related to the unmodified nucleic acid molecules so that the modified and unmodified nucleic acid molecules hybridize under stringent conditions known to one of skill in the art.
- modified nucleic acid molecules which encode polypeptides having single amino acid changes can be prepared (e.g., preferably not those amino acids which are contact points for HLA binding).
- Each of these nucleic acid molecules can have one, two or three nucleotide substitutions exclusive of nucleotide changes co ⁇ esponding to the degeneracy of the genetic code as described herein.
- modified nucleic acid molecules which encode polypeptides having two amino acid changes can be prepared which have, e.g., 2-6 nucleotide changes.
- Numerous modified nucleic acid molecules like these will be readily envisioned by one of skill in the art, including for example, substitutions of nucleotides in codons encoding amino acids 2 and 3, 2 and 4, 2 and 5, 2 and 6, and so on.
- each combination of two amino acids is included in the set of modified nucleic acid molecules, as well as all nucleotide substitutions which code for the amino acid substitutions.
- nucleic acid molecules that encode polypeptides having additional substitutions (i.e., 3 or more), additions or deletions (e.g., by introduction of a stop codon or a splice site(s)) also can be prepared and are embraced by the invention as readily envisioned by one of ordinary skill in the art. Any of the foregoing nucleic acids or polypeptides can be tested by routine experimentation for retention of structural relation or activity to the nucleic acids and/or polypeptides disclosed herein. It will also be understood that the invention embraces the use of the sequences in expression vectors, as well as to transfect host cells and cell lines, be these prokaryotic (e.g., E.
- the expression vectors require that the pertinent sequence, i.e., those described supra, be operably linked to a promoter.
- the expression vector may also include a nucleic acid sequence coding for an HLA-Cw*07 molecule.
- HLA molecules can be used.
- the vector contains both coding sequences, it can be used to transfect a cell which does not normally express either one.
- the MAGE-Al 2 HLA class I binding peptide coding sequence may be used alone, when, e.g. the host cell already expresses an HLA-Cw*07 molecule.
- an HLA-Cw*07 molecule includes the subtypes HLA-Cw*0701 (07011, 07012), 0702, 0703, 0704, 0705, 0706, 0707, 0708, 0709, 0710, 0711, 0712, 0713 and 0714.
- HLA-Cw*07 molecule also includes the subtypes which can be found in Bodmer et al., Tissue Antigens 49:297, 1996.
- a listing of presently identified HLA-Cw*07 subtypes can be found on the IMGT/HLA database at internet URL http://www.ebi.ac.uk/imgt/hla/.
- the invention embraces the use of the sequences in expression vectors including recombinant plasmids, phagemids, viruses and the like, as well as to transfect host cells and cell lines, be these prokaryotic (e.g., E. coli), or eukaryotic (e.g., dendritic cells, CHO cells, COS cells, yeast expression systems and recombinant baculovirus expression in insect cells).
- the expression vectors require that the pertinent sequence, i.e., those described supra, be operably linked to a promoter.
- Recombinant vectors including viruses selected from the group consisting of adenoviruses, adeno-associated viruses, poxviruses including vaccinia viruses and attenuated poxviruses such as NYVAC, Semliki Forest virus, Venezuelan equine encephalitis virus, retroviruses, Sindbis virus, and Ty virus-like particle, plasmids (e.g.
- naked DNA DNA
- bacteria e.g. the bacterium Bacille Calmette Guerin, BCG
- BCG Bacille Calmette Guerin
- Other viruses, expression vectors and the like which are useful in preparation of a vaccine are known to one of ordinary skill in the art.
- non-MAGE-A12 tumor associated peptides also can be administered to increase immune response via HLA class I and/or class II. It is well established that cancer cells can express more that one tumor associated gene. It is within the scope of routine experimentation for one of ordinary skill in the art to determine whether a particular subject expresses additional tumor associated genes, and then include HLA class I and/or HLA class II binding peptides derived from expression products of such genes in MAGE-Al 2 compositions and vaccines.
- nucleic acids encoding a series of epitopes, known as "polytopes".
- the epitopes can be a ⁇ anged in sequential or overlapping fashion (see, e.g., Thomson et al., Proc. Natl. Acad. Sci. USA 92:5845-5849, 1995; Gilbert et al., Nature
- the polytope is processed to generated individual epitopes which are recognized by the immune system for generation of immune responses.
- MAGE-Al 2 HLA binding peptides such as SEQ ID NOs:4, 5 and 6, and which are presented by MHC molecules and recognized by CTLs (or T helper lymphocytes) can be combined with peptides from other tumor rejection antigens (e.g. by preparation of hybrid nucleic acids or polypeptides) to form "polytopes".
- Exemplary tumor associated peptide antigens that can be administered to induce or enhance an immune response are derived from tumor associated genes and encoded proteins including MAGE- Al, MAGE-A2, MAGE-A3, MAGE-A4, MAGE-A5, MAGE-A6, MAGE-A7, MAGE-A8, MAGE-A9, MAGE-A10, MAGE-Al 1, MAGE-A12, GAGE-1, GAGE-2, GAGE-3, GAGE-4, GAGE-5, GAGE-6, GAGE-7, GAGE-8, GAGE-9, B AGE- 1, RAGE- 1, LB33/MUM-1, PRAME, NAG, MAGE-Xp2 (MAGE-B2), MAGE-Xp3 (MAGE-B3), MAGE-Xp4 (MAGE- B4), tyrosinase, brain glycogen phosphorylase, Melan-A, MAGE-C1, MAGE-C2, MAGE-C3, MAGE-C4, MAGE-C5, NY-ESO-1, LAGE-1,
- HLA-B44 SEIWRDIDF 192-200 28
- HLA class I and HLA class II binding peptides will be known to one of ordinary skill in the art (for example, see Coulie, Stem Cells 13:393-403, 1995), and can be used in the invention in a like manner as those disclosed herein.
- One of ordinary skill in the art can prepare polypeptides comprising one or more MAGE-Al 2 peptides and one or more of the foregoing tumor rejection peptides, or nucleic acids encoding such polypeptides, according to standard procedures of molecular biology.
- polytopes are groups of two or more potentially immunogenic or immune response stimulating peptides which can be joined together in various a ⁇ angements (e.g. concatenated, overlapping).
- the polytope (or nucleic acid encoding the polytope) can be administered in a standard immunization protocol, e.g. to animals, to test the effectiveness of the polytope in stimulating, enhancing and/or provoking an immune response.
- the peptides can be joined together directly or via the use of flanking sequences to form polytopes, and the use of polytopes as vaccines is well known in the art (see, e.g., Thomson et al., Proc. Natl. Acad. Sci USA 92(13):5845-5849, 1995; Gilbert et al., Nature Biotechnol. 15(12):1280-1284, 1997; Thomson et al., J Immunol. 157(2):822-826, 1996; Tarn et al., J Exp. Med. 171(l):299-306, 1990).
- Tarn showed that polytopes consisting of both MHC class I and class II binding epitopes successfully generated antibody and protective immunity in a mouse model. Tarn also demonstrated that polytopes comprising "strings" of epitopes are processed to yield individual epitopes which are presented by MHC molecules and recognized by CTLs. Thus polytopes containing various numbers and combinations of epitopes can be prepared and tested for recognition by CTLs and for efficacy in increasing an immune response.
- tumors express a set of tumor antigens, of which only certain subsets may be expressed in the tumor of any given patient.
- Polytopes can be prepared which co ⁇ espond to the different combination of epitopes representing the subset of tumor rejection antigens expressed in a particular patient. Polytopes also can be prepared to reflect a broader spectrum of tumor rejection antigens known to be expressed by a tumor type. Polytopes can be introduced to a patient in need of such treatment as polypeptide structures, or via the use of nucleic acid delivery systems known in the art (see, e.g., Allsopp et al., Eur. J. Immunol. 26(8):1951-1959, 1996).
- Adenovirus, pox virus, Ty-virus like particles, adeno-associated virus, plasmids, bacteria, etc. can be used in such delivery.
- the expression vector may also include a nucleic acid sequence coding for an HLA-Cw*07 molecule. Nucleic acids encoding single chain soluble HLA/peptide complex including a MAGE-Al 2 immunogenic polypeptide fused to an HLA- Cw*07 molecule can be prepared as described by Lone et al. (J Immunother. 21:283-294, 1998).
- the vector In a situation where the vector contains both coding sequences, it can be used to transfect a cell which does not normally express either one.
- the MAGE-Al 2 immunogenic polypeptide coding sequence may be used alone, when, e.g. the host cell already expresses an HLA-Cw*07 molecule.
- the particular host cell which can be used as the vectors which contain the two coding sequences may be used in host cells which do not express HLA-Cw*07 molecules if desired, and the nucleic acid coding for the MAGE- Al 2 immunogenic polypeptide can be used in antigen presenting cells which express an HLA-Cw*07 molecule.
- a "vector" may be any of a number of nucleic acids into which a desired sequence may be inserted by restriction and ligation for transport between different genetic environments or for expression in a host cell.
- Vectors are typically composed of DNA although RNA vectors are also available.
- Vectors include, but are not limited to, plasmids, phagemids, bacteria and virus genomes as disclosed herein, such as adenovirus, poxvirus and BCG.
- a cloning vector is one which is able to replicate in a host cell or be replicated after its integration into the genome of a host cell, and which is further characterized by one or more endonuclease restriction sites at which the vector may be cut in a determinable fashion and into which a desired DNA sequence may be ligated such that the new recombinant vector retains its ability to replicate in the host cell.
- replication of the desired sequence may occur many times as the plasmid increases in copy number within the host bacterium or just a single time per host before the host reproduces by mitosis.
- replication may occur actively during a lytic phase or passively during a lysogenic phase.
- An expression vector is one into which a desired DNA sequence may be inserted by restriction and ligation such that it is operably joined to regulatory sequences and may be expressed as an RNA transcript.
- Vectors may further contain one or more marker sequences suitable for use in the identification of cells which have or have not been transformed or transfected with the vector.
- Markers include, for example, genes encoding proteins which increase or decrease either resistance or sensitivity to antibiotics or other compounds, genes which encode enzymes whose activities are detectable by standard assays known in the art (e.g., ⁇ -galactosidase, luciferase or alkaline phosphatase), and genes which visibly affect the phenotype of transformed or transfected cells, hosts, colonies or plaques (e.g., green fluorescent protein).
- Prefe ⁇ ed vectors are those capable of autonomous replication and expression of the structural gene products present in the DNA segments to which they are operably joined.
- a coding sequence and regulatory sequences are said to be "operably” joined when they are covalently linked in such a way as to place the expression or transcription of the coding sequence under the influence or control of the regulatory sequences. If it is desired that the coding sequences be translated into a functional protein, two DNA sequences are said to be operably joined if induction of a promoter in the 5' regulatory sequences results in the transcription of the coding sequence and if the nature of the linkage between the two DNA sequences does not (1) result in the introduction of a frame-shift mutation, (2) interfere with the ability of the promoter region to direct the transcription of the coding sequences, or (3) interfere with the ability of the co ⁇ esponding RNA transcript to be translated into a protein.
- a promoter region would be operably joined to a coding sequence if the promoter region were capable of effecting transcription of that DNA sequence such that the resulting transcript might be translated into the desired protein or polypeptide.
- certain prefe ⁇ ed nucleic acids express only fragments of MAGE-Al 2 polypeptides which include the HLA binding peptides described herein.
- regulatory sequences needed for gene expression may vary between species or cell types, but shall in general include, as necessary, 5' non-transcribed and 5' non-translated sequences involved with the initiation of transcription and translation respectively, such as a TATA box, capping sequence, CAAT sequence, and the like.
- 5' non-transcribed regulatory sequences will include a promoter region which includes a promoter sequence for transcriptional control of the operably joined gene.
- Regulatory sequences may also include enhancer sequences or upstream activator sequences as desired.
- the vectors of the invention may optionally include 5' leader or signal sequences. The choice and design of an appropriate vector is within the ability and discretion of one of ordinary skill in the art.
- RNA heterologous DNA
- MAGE-Al 2 immunogenic polypeptide a MAGE-Al 2 immunogenic polypeptide
- Prefe ⁇ ed systems for mRNA expression in mammalian cells are those such as pcDNA3.1 (available from Invitrogen, Carlsbad, CA) that contain a selectable marker such as a gene that confers G418 resistance (which facilitates the selection of stably transfected cell lines) and the human cytomegalovirus (CMV) enhancer-promoter sequences.
- pcDNA3.1 available from Invitrogen, Carlsbad, CA
- CMV human cytomegalovirus
- suitable for expression in primate or canine cell lines is the pCEP4 vector (Invitrogen), which contains an Epstein Ban virus (EBV) origin of replication, facilitating the maintenance of plasmid as a multicopy extrachromosomal element.
- ESV Epstein Ban virus
- Another expression vector is the pEF- BOS plasmid containing the promoter of polypeptide Elongation Factor l , which stimulates efficiently transcription in vitro.
- the plasmid is described by Mishizuma and Nagata (Nuc. Acids Res. 18:5322, 1990), and its use in transfection experiments is disclosed by, for example, Demoulin (Mol. Cell. Biol. 16:4710-4716, 1996).
- Still another prefe ⁇ ed expression vector is an adenovirus, described by Stratford-Perricaudet, which is defective for El and E3 proteins (J. Clin. Invest. 90:626-630, 1992). The use of the adenovirus to express proteins for immunization is disclosed by Warnier et al., in intradermal injection in mice for immunization against PI A (Int. J Cancer, 67:303-310, 1996).
- the invention also embraces so-called expression kits, which allow the artisan to prepare a desired expression vector or vectors.
- expression kits include at least separate portions of at least two of the previously discussed materials. Other components may be added, as desired.
- the invention permits the artisan to diagnose a disorder characterized by expression of a MAGE-Al 2 immunogenic polypeptide.
- These methods involve determining expression of a MAGE-A12 HLA binding peptide, or a complex of a MAGE-A12 HLA binding peptide and an HLA class I molecule in a biological sample.
- the expression of a peptide or complex of peptide and HLA class I molecule can be determined by assaying with a binding partner for the peptide or complex, such as an antibody.
- MAGE- Al 2 in a biological sample can also be tested by standard PCR amplification protocols using MAGE-Al 2 primers.
- An example of tumor expression is presented herein and further disclosure of exemplary conditions and primers for MAGE-Al 2 amplification can be found in US serial no. 09/018,422.
- the diagnostic methods involve contacting a biological sample isolated from a subject with an agent specific for the MAGE-Al 2 HLA binding peptide to detect the presence of the MAGE-Al 2 HLA binding peptide in the biological sample.
- contacting means placing the biological sample in sufficient proximity to the agent and under the appropriate conditions of, e.g., concentration, temperature, time, ionic strength, to allow the specific interaction between the agent and MAGE-Al 2 HLA binding peptide that are present in the biological sample.
- the conditions for contacting the agent with the biological sample are conditions known by those of ordinary skill in the art to facilitate a specific interaction between a molecule and its cognate (e.g., a protein and its receptor cognate, an antibody and its protein antigen cognate, a nucleic acid and its complementary sequence cognate) in a biological sample.
- exemplary conditions for facilitating a specific interaction between a molecule and its cognate are described in U.S. Patent No. 5,108,921, issued to Low et al.
- the biological sample can be located in vivo or in vitro.
- the biological sample can be a tissue in vivo and the agent specific for the MAGE-Al 2 immunogenic polypeptide can be used to detect the presence of such molecules in the tissue.
- the biological sample can be located in vitro (e.g., a blood sample, tumor biopsy, tissue extract).
- the biological sample can be a cell- containing sample, more preferably a sample containing tumor cells.
- the invention further includes nucleic acid or protein microa ⁇ ays which include MAGE-Al 2 HLA binding peptides or nucleic acids encoding such peptides.
- standard techniques of microa ⁇ ay technology are utilized to assess expression of the MAGE-Al 2 HLA binding peptides and/or identify biological constituents that bind such peptides.
- the constituents of biological samples include antibodies, HLA molecules, lymphocytes (particularly T lymphocytes), and the like.
- Microa ⁇ ay technology which is also known by other names including: protein chip technology and solid-phase protein a ⁇ ay technology, is well known to those of ordinary skill in the art and is based on, but not limited to, obtaining an a ⁇ ay of identified peptides or proteins on a fixed substrate, binding target molecules or biological constituents to the peptides, and evaluating such binding. See, e.g., G. MacBeath and S.L. Schreiber, "Printing Proteins as Microa ⁇ ays for High-Throughput Function Determination," Science 289(5485):1760-1763, 2000.
- Nucleic acid a ⁇ ays particularly a ⁇ ays of aptamers that bind MAGE-Al 2 HLA binding peptides also can be used for diagnostic applications, such as for identifying subjects that have a condition characterized by MAGE-Al 2 HLA binding peptide expression.
- Microa ⁇ ay substrates include but are not limited to glass, silica, aluminosilicates, borosilicates, metal oxides such as alumina and nickel oxide, various clays, nitrocellulose, or nylon.
- the microa ⁇ ay substrates may be coated with a compound to enhance synthesis of a probe (peptide or nucleic acid) on the substrate.
- Coupling agents or groups on the substrate can be used to covalently link the first nucleotide or amino acid to the substrate. A variety of coupling agents or groups are known to those of skill in the art. Peptide or nucleic acid probes thus can be synthesized directly on the substrate in a predetermined grid.
- peptide or nucleic acid probes can be spotted on the substrate, and in such cases the substrate may be coated with a compound to enhance binding of the probe to the substrate.
- presynthesized probes are applied to the substrate in a precise, predetermined volume and grid pattern, preferably utilizing a computer-controlled robot to apply probe to the substrate in a contact-printing manner or in a non-contact manner such as ink jet or piezo-electric delivery.
- Probes may be covalently linked to the substrate.
- one or more control peptide or nucleic acid molecules are attached to the substrate.
- control nucleic acid molecules allow determination of factors such as binding characteristics, reagent quality and effectiveness, hybridization success, and analysis thresholds and success.
- the invention also permits the artisan to treat a subject having a disorder characterized by expression of a MAGE-A12 immunogenic polypeptide.
- Treatments include administering an agent which enriches in the subject a complex of a MAGE-Al 2 HLA binding peptide and an HLA class I molecule, and administering CD8 + T lymphocytes which are specific for such complexes.
- Agents useful in the foregoing treatments include MAGE- Al 2 immunogenic polypeptides and functional variants thereof, complexes of such peptides and HLA class I binding molecules (e.g.
- HLA Cw*07 antigen presenting cells bearing complexes of a MAGE-Al 2 immunogenic polypeptide and an HLA class I binding molecule, soluble single chain fusions of HLA and MAGE-Al 2 polypeptides, and the like.
- the invention also permits an artisan to selectively enrich a population of T lymphocytes for CD8 + T lymphocytes specific for a MAGE-A12 HLA binding peptide.
- the isolation of the MAGE-Al 2 HLA binding peptides also makes it possible to isolate or design nucleic acids which encode the MAGE-A12 HLA binding peptides.
- Nucleic acids can be used to produce in vitro or in prokaryotic or eukaryotic host cells the MAGE- A12 HLA binding peptides or proteins containing such peptides.
- a variety of methodologies well-known to the skilled practitioner can be utilized to obtain isolated MAGE-Al 2 HLA binding peptides.
- an expression vector may be introduced into cells to cause production of the peptides.
- mRNA transcripts may be microinjected or otherwise introduced into cells to cause production of the encoded peptides.
- mRNA in cell-free extracts such as the reticulocyte lysate system
- Peptides comprising the MAGE-A12 HLA binding peptides of the invention may also be synthesized in vitro.
- Those skilled in the art also can readily follow known methods for isolating peptides in order to obtain isolated MAGE-A12 HLA binding peptides. These include, but are not limited to, immunochromotography, HPLC, size-exclusion chromatography, ion-exchange chromatography and immune-affinity chromatography.
- MAGE-A12 HLA binding peptides or complexes of the peptides and HLA class I molecules, such as an HLA-Cw*0701 molecule, may be combined with materials such as adjuvants to produce vaccines useful in treating disorders characterized by expression of the MAGE-Al 2 immunogenic polypeptide.
- vaccines can be prepared from cells which present the MAGE-Al 2 HLA binding peptide/HLA complexes on their surface, such as transfected dendritic cells, transfected B cells, non-proliferative transfectants, etcetera.
- Vaccines also encompass expression vectors and naked DNA or RNA, encoding a MAGE-Al 2 HLA binding peptide, precursors thereof, or fusion proteins thereof, which may be produced in vitro and administered via injection, particle bombardment, nasal aspiration and other methods.
- Vaccines of the "naked nucleic acid” type have been demonstrated to provoke an immunological response including generation of CTLs specific for the peptide encoded by the naked nucleic acid (Science 259:1745-1748, 1993).
- MAGE-A12 HLA binding peptides as well as complexes of MAGE-A12 HLA binding peptides and HLA molecules, also may be used to produce antibodies, using standard techniques well known to the art. Standard reference works setting forth the general principles of antibody production include Catty, D., Antibodies, A Practical Approach, Vol. 1, IRL Press, Washington DC (1988); Klein, J., Immunology: The Science of Cell-Non-Cell Discrimination, John Wiley and Sons, New York (1982); Kennett, R., et al., Monoclonal
- the antibodies of the present invention thus are prepared by any of a variety of methods, including administering protein, fragments of protein, cells expressing the protein or fragments thereof and an appropriate HLA class I molecule, and the like to an animal to induce polyclonal antibodies.
- the production of monoclonal antibodies is according to techniques well known in the art.
- an antibody from which the pFc' region has been enzymatically cleaved, or which has been produced without the pFc' region designated an F(ab') 2 fragment
- an antibody from which the Fc region has been enzymatically cleaved, or which has been produced without the Fc region designated an Fab fragment
- Fab fragments consist of a covalently bound antibody light chain and a portion of the antibody heavy chain denoted Fd.
- the Fd fragments are the major determinant of antibody specificity (a single Fd fragment may be associated with up to ten different light chains without altering antibody specificity) and Fd fragments retain epitope-binding ability in isolation.
- CDRs complementarity determining regions
- FRs framework regions
- CDR1 through CDR3 complementarity determining regions
- non-CDR regions of a mammalian antibody may be replaced with similar regions of conspecific or heterospecific antibodies while retaining the epitopic specificity of the original antibody.
- This is most clearly manifested in the development and use of "humanized" antibodies in which non-human CDRs are covalently joined to human FR and/or Fc/pFc' regions to produce a functional antibody. See, e.g., U.S. patents 4,816,567, 5,225,539, 5,585,089, 5,693,762 and 5,859,205.
- PCT International Publication Number WO 92/04381 teaches the production and use of humanized murine RSV antibodies in which at least a portion of the murine FR regions have been replaced by FR regions of human origin.
- Such antibodies including fragments of intact antibodies with antigen-binding ability, are often refe ⁇ ed to as "chimeric" antibodies.
- the present invention also provides for F(ab') 2 , Fab, Fv and Fd fragments; chimeric antibodies in which the Fc and/or FR and/or CDR1 and/or CDR2 and/or light chain CDR3 regions have been replaced by homologous human or non-human sequences; chimeric F(ab') 2 fragment antibodies in which the FR and/or CDR1 and/or CDR2 and/or light chain CDR3 regions have been replaced by homologous human or non-human sequences; chimeric Fab fragment antibodies in which the FR and/or CDR1 and/or CDR2 and/or light chain CDR3 regions have been replaced by homologous human or non-human sequences; and chimeric Fd fragment antibodies in which the FR and/or CDR1 and/or CDR2 regions have been replaced by homologous human or non-human sequences.
- the present invention also includes so-called single chain antibodies and human monoclonal antibodies, such as those
- Antibodies may be used for example to identify tissues expressing protein or to purify protein.
- Antibodies also may be coupled to specific labeling agents for imaging or to antitumor agents, including, but not limited to, methotrexate, radioiodinated compounds, toxins such as ricin, other cytostatic or cytolytic drugs, and so forth, for therapeutic pu ⁇ oses.
- Antibodies prepared according to the invention also preferably are specific for the peptide/HLA complexes described herein.
- disorders refers to any pathological condition where the MAGE-A12 immunogenic polypeptide is expressed.
- disorders include cancers, including bladder carcinomas, melanomas, esophageal carcinomas, lung carcinomas, head and neck carcinomas, breast carcinomas, colorectal carcinomas, myelomas, brain tumors, sarcomas, prostate carcinomas and renal carcinomas.
- Some therapeutic approaches based upon the disclosure are premised on inducing a response by a subject's immune system to MAGE-A12 immunogenic polypeptide presenting cells.
- One such approach is the administration of autologous CD8 + T cells specific to the complex of a MAGE-Al 2 HLA binding peptide and an HLA class I molecule to a subject with abnormal cells of the phenotype at issue. It is within the skill of the artisan to develop such CD8 + T cells in vitro.
- a sample of cells taken from a subject, such as blood cells are contacted with a cell presenting the complex and capable of provoking CD8 + T lymphocytes to proliferate.
- the target cell can be a transfectant, such as a transfected COS cell, or a transfected antigen presenting cell bearing HLA class I molecules, such as dendritic cells or B cells. These transfectants present the desired complex of their surface and, when combined with a CD8 T lymphocyte of interest, stimulate its proliferation.
- COS cells are widely available, as are other suitable host cells.
- the clonally expanded autologous CD8 + T lymphocytes then are administered to the subject.
- the CD8 + T lymphocytes then stimulate the subject's immune response, thereby achieving the desired therapeutic goal.
- Tetramers are formed by mixing the biotinylated peptide-MHC complex with labeled avidin (e.g. phycoerythrin) at a molar ratio or 4:1. Tetramers are then contacted with a source of CTLs such as peripheral blood or lymph node. The tetramers bind CTLs which recognize the peptide antigen/MHC class I complex. Cells bound by the tetramers can be sorted by fluorescence activated cell sorting to isolate the reactive CTLs. The isolated CTLs then can be expanded in vitro for use as described herein.
- avidin e.g. phycoerythrin
- the foregoing therapy assumes that at least some of the subject's abnormal cells present the relevant HLA/TRA complex. This can be determined very easily, as the art is very familiar with methods for identifying cells which present a particular HLA molecule, as well as how to identify cells expressing DNA of the pertinent sequences, in this case a tumor associated gene sequence.
- Once cells presenting the relevant complex are identified via the foregoing screening methodology, they can be combined with a sample from a patient, where the sample contains CTLs. If the complex presenting cells are lysed by the mixed CTL sample, then it can be assumed that a tumor associated gene derived TRA is being presented, and the subject is an appropriate candidate for the therapeutic approaches set forth supra.
- CD8 + T lymphocytes can also be provoked in vivo, using a number of approaches.
- One approach is the use of non-proliferative cells expressing the complex.
- the cells used in this approach may be those that normally express the complex, which could be dendritic cells or cells transfected with one or both of the genes necessary for presentation of the complex. Chen et al., (Proc. Natl. Acad. Sci. USA 88: 110-114, 1991) exemplifies this approach, showing the use of transfected cells expressing HPV-E7 peptides in a therapeutic regime.
- Various cell types may be used.
- vectors carrying one or both of the genes of interest may be used.
- Viral or bacterial vectors are especially prefe ⁇ ed.
- nucleic acids which encode a MAGE-Al 2 HLA binding peptide may be operably linked to promoter and enhancer sequences which direct expression of the MAGE-Al 2 HLA binding peptide in certain tissues or cell types.
- the nucleic acid may be inco ⁇ orated into an expression vector.
- Expression vectors may be unmodified extrachromosomal nucleic acids, plasmids or viral genomes constructed or modified to enable insertion of exogenous nucleic acids, such as those encoding MAGE-Al 2 HLA binding peptides.
- Nucleic acids encoding a MAGE-Al 2 HLA binding peptide also may be inserted into a retroviral genome, thereby facilitating integration of the nucleic acid into the genome of the target tissue or cell type.
- the gene of interest is carried by a microorganism, e.g., a Vaccinia virus, retrovirus or the bacteria BCG, and the materials de facto "infect" host cells. The cells which result present the complex of interest, and are recognized by autologous CD8 + T cells, which then proliferate.
- a similar effect can be achieved by combining a MAGE-Al 2 HLA binding peptide with an adjuvant to facilitate inco ⁇ oration into HLA class I presenting cells in vivo. If larger than the HLA class I binding portion, the MAGE-Al 2 HLA binding peptide can be processed if necessary to yield the peptide partner of the HLA molecule while the TRA is presented without the need for further processing. Generally, subjects can receive an intradermal injection of an effective amount of the MAGE-Al 2 immunogenic polypeptide. Initial doses can be followed by booster doses, following immunization protocols standard in the art.
- one or more cancer associated antigens or stimulatory fragments thereof are administered with one or more adjuvants to induce an immune response or to increase an immune response.
- An adjuvant is a substance inco ⁇ orated into or administered with antigen which potentiates the immune response.
- Adjuvants may enhance the immunological response by providing a reservoir of antigen (extracellularly or within macrophages), activating macrophages and stimulating specific sets of lymphocytes.
- Adjuvants of many kinds are well known in the art.
- adjuvants include monophosphoryl lipid A (MPL, SmithKline Beecham), a congener obtained after purification and acid hydrolysis of Salmonella minnesota Re 595 lipopolysaccharide; saponins including QS21 (SmithKline Beecham), a pure QA-21 saponin purified from Quillaja saponaria extract; DQS21, described in PCT application WO96/33739 (SmithKline Beecham); QS-7, QS-17, QS-18, and QS-L1 (So et al., Mol.
- MPL monophosphoryl lipid A
- SPL SmithKline Beecham
- saponins including QS21 (SmithKline Beecham), a pure QA-21 saponin purified from Quillaja saponaria extract
- DQS21 described in PCT application WO96/33739 (SmithKline Beecham)
- QS-7, QS-17, QS-18, and QS-L1 So et al., Mol.
- the peptides are administered mixed with a combination of DQS21/MPL.
- the ratio of DQS21 to MPL typically will be about 1 :10 to 10:1, preferably about 1 :5 to 5:1 and more preferably about 1 :1.
- DQS21 and MPL will be present in a vaccine formulation in the range of about 1 ⁇ g to about 100 ⁇ g.
- Other adjuvants are known in the art and can be used in the invention (see, e.g. Goding, Monoclonal Antibodies: Principles and Practice, 2nd Ed., 1986). Methods for the preparation of mixtures or emulsions of peptide and adjuvant are well known to those of skill in the art of vaccination.
- cytokines are also useful in vaccination protocols as a result of their lymphocyte regulatory properties.
- cytokines useful for such pu ⁇ oses will be known to one of ordinary skill in the art, including interleukin-12 (IL-12) which has been shown to enhance the protective effects of vaccines (see, e.g., Science 268: 1432-1434, 1995), GM-CSF and IL-18.
- IL-12 interleukin-12
- GM-CSF GM-CSF
- IL-18 interleukin-18
- costimulatory molecules provided in either protein or nucleic acid form.
- costimulatory molecules include the B7-1 and B7-2 (CD80 and CD86 respectively) molecules which are expressed on dendritic cells (DC) and interact with the CD28 molecule expressed on the T cell. This interaction provides costimulation (signal 2) to an antigen/MHC/TCR stimulated (signal 1) T cell, increasing T cell proliferation and effector function.
- B7 also interacts with CTLA4 (CD 152) on T cells and studies involving CTLA4 and B7 ligands indicate that the B7-CTLA4 interaction can enhance antitumor immunity and CTL proliferation (Zheng et al., Proc.
- B7 typically is not expressed on tumor cells so they are not efficient antigen presenting cells (APCs) for T cells. Induction of B7 expression would enable the tumor cells to stimulate more efficiently CTL proliferation and effector function.
- a combination of B7/IL-6/IL-12 costimulation has been shown to induce IFN-gamma and a Thl cytokine profile in the T cell population leading to further enhanced T cell activity (Gajewski et al., J. Immunol. 154:5637-5648, 1995).
- Tumor cell transfection with B7 has been discussed in relation to in vitro CTL expansion for adoptive transfer immunotherapy by Wang et al. (J Immunother. 19:1-8, 1996).
- B7 molecule delivery mechanisms for the B7 molecule would include nucleic acid (naked DNA) immunization (Kim et al., Nature Biotechnol. 15:7:641-646, 1997) and recombinant viruses such as adeno and pox (Wendtner et al., Gene Ther. 4:726-735,
- Lymphocyte function associated antigen-3 (LFA-3) is expressed on APCs and some tumor cells and interacts with CD2 expressed on T cells. This interaction induces T cell IL-2 and IFN-gamma production and can thus complement but not substitute, the B7/CD28 costimulatory interaction (Pa ⁇ a et al., J Immunol, 158:637-642, 1997; Fenton et al., J Immunother., 21 :95-108, 1998).
- Lymphocyte function associated antigen- 1 (LFA-1) is expressed on leukocytes and interacts with ICAM-1 expressed on APCs and some tumor cells. This interaction induces T cell IL-2 and IFN-gamma production and can thus complement but not substitute, the B7/CD28 costimulatory interaction (Fenton et al., 1998). LFA-1 is thus a further example of a costimulatory molecule that could be provided in a vaccination protocol in the various ways discussed above for B7.
- Th cell help through the interaction between the Th cell CD40L (CD40 ligand) molecule and the CD40 molecule expressed by DCs (Ridge et al., Nature 393:474, 1998; Bennett et al., Nature 393:478, 1998; Schoenberger et al., Nature 393:480, 1998).
- This mechanism of this costimulatory signal is likely to involve upregulation of B7 and associated IL-6/IL-12 production by the DC (APC).
- the CD40-CD40L interaction thus complements the signal 1 (antigen/MHC-TCR) and signal 2 (B7-CD28) interactions.
- anti-CD40 antibodies to stimulate DC cells directly, would be expected to enhance a response to tumor associated antigens which are normally encountered outside of an inflammatory context or are presented by non-professional APCs (tumor cells). In these situations Th help and B7 costimulation signals are not provided. This mechanism might be used in the context of antigen pulsed DC based therapies or in situations where Th epitopes have not been defined within known tumor associated antigen precursors.
- compositions of the present invention are administered in pharmaceutically acceptable preparations.
- Such preparations may routinely contain pharmaceutically acceptable concentrations of salt, buffering agents, preservatives, compatible carriers, supplementary immune potentiating agents such as adjuvants and cytokines and optionally other therapeutic agents.
- pharmaceutically acceptable means a non-toxic material that does not interfere with the effectiveness of the biological activity of the active ingredients. The characteristics of the carrier will depend on the route of administration.
- the therapeutics of the invention can be administered by any conventional route, including injection or by gradual infusion over time.
- the administration may, for example, be oral, intravenous, intraperitoneal, intramuscular, intranasal, intracavity, subcutaneous, intradermal or transdermal.
- Preparations for parenteral administration include sterile aqueous or non-aqueous solutions, suspensions, and emulsions.
- non-aqueous solvents are propylene glycol, polyethylene glycol, vegetable oils such as olive oil, and injectable organic esters such as ethyl oleate.
- Aqueous carriers include water, alcoholic/aqueous solutions, emulsions or suspensions, including saline and buffered media.
- Parenteral vehicles include sodium chloride solution, Ringer's dextrose, dextrose and sodium chloride, lactated Ringer's or fixed oils.
- Intravenous vehicles include fluid and nutrient replenishers, electrolyte replenishers (such as those based on Ringer's dextrose), and the like. Preservatives and other additives may also be present such as, for example, antimicrobials, anti-oxidants, chelating agents, and inert gases and the like.
- the invention also contemplates gene therapy.
- the procedure for performing ex vivo gene therapy is outlined in U.S. Patent 5,399,346 and in exhibits submitted in the file history of that patent, all of which are publicly available documents. In general, it involves introduction in vitro of a functional copy of a gene into a cell(s) of a subject which contains a defective copy of the gene, and returning the genetically engineered cell(s) to the subject.
- the functional copy of the gene is under operable control of regulatory elements which permit expression of the gene in the genetically engineered cell(s).
- Numerous transfection and transduction techniques as well as appropriate expression vectors are well known to those of ordinary skill in the art, some of which are described in PCT application WO95/00654.
- In vivo gene therapy using vectors such as adenovirus also is contemplated according to the invention.
- the preparations of the invention are administered in effective amounts.
- An effective amount is that amount of a pharmaceutical preparation that alone, or together with further doses, stimulates the desired response.
- the desired response is inhibiting the progression of the cancer. This may involve only slowing the progression of the disease temporarily, although more preferably, it involves halting the progression of the disease permanently.
- the desired response is an increase in antibodies or T lymphocytes which are specific for the MAGE-Al 2 immunogen(s) employed.
- this may involve the stimulation of a humoral antibody response resulting in an increase in antibody titer in serum, a clonal expansion of cytotoxic lymphocytes, or some other desirable immunologic response. It is believed that doses of immunogens ranging from one nanogram/kilogram to 100 milligrams/kilogram, depending upon the mode of administration, would be effective. The prefe ⁇ ed range is believed to be between 500 nanograms and 500 micrograms per kilogram. The absolute amount will depend upon a variety of factors, including the material selected for administration, whether the administration is in single or multiple doses, and individual patient parameters including age, physical condition, size, weight, and the stage of the disease. These factors are well known to those of ordinary skill in the art and can be addressed with no more than routine experimentation. Examples Materials and Methods
- Bladder carcinoma cell line LB831-BLC was derived from the primary invasive bladder tumor (pT3, G3) of a 65-yr-old Caucasian patient, LB831 (HLA-A*2403, -A3, -B*4403, -B*4901, -Cw*0401, -Cw*07).
- the karyotype of the cell line performed at passage 7 showed that the number of chromosomes varied from 56 to 144, confirming that the LB831 cell line was a tumor line.
- MI13443-MEL is a melanoma cell line and LE9211-RCC is a renal carcinoma cell line. Both were derived from an HLA-Cw7-negative patient.
- LB373- MEL is a melanoma line derived from an HLA-Cw7-negative patient.
- the tumor cells were cultured in Iscove's medium (Life Technologies, Gaithersburg, MD) containing 10% human serum or 10% FCS (Life Technologies) in a 8% CO 2 incubator.
- Lymphoblastoid cell line LB-831-EBV was derived from the PBLs of patient LB831 with 1 ⁇ g/ml of Cyclosporine A (Sandoz, Basel, Switzerland) and 20% (v/v) of supernatant of EBV transformed B95-8 cells using standard techniques.
- This cell line was grown in RPMI-1640 medium (Life Technologies) containing 10% FCS in a 5% CO 2 incubator.
- PBL-PHA cells were prepared by stimulation of PBL with 0.1% (v/v) PHA (Difco) and 100 U/ml of IL-2 (Eurocetus, Amsterdam, Netherlands) and cultured in an 8% CO 2 incubator in Iscove's medium containing 10% human serum. All media were supplemented with L-arginine (1 16 ⁇ g/ml), L- asparagine (36 ⁇ g/ml), L-glutamine (216 ⁇ g/ml), streptomycin (0.1 mg/ml) and penicillin (200 U/ml).
- Blood mononuclear cells of patient LB831 were isolated by Lymphoprep (Nycomed, Oslo, Norway) density-gradient centrifugation and stored at -80°C. Autologous mixed lymphocyte-tumor cell culture was performed by mixing i ⁇ adiated B7-1 transfected LB831- BLC cells as stimulators and CD8+ T lymphocytes as responders as described previously (Gueguen et al., J. Immunology 160:6188-6194, 1998). CD8 + T lymphocytes were sorted with magnetic beads covalently coupled to anti-CD8 antibodies (MACS, Miltenyi Biotec GmbH). I ⁇ adiated non-CD8 + cells were added to the mixed culture during the first stimulation.
- IL-2 25 U/ml was added. After one week, 5 x 10 5 lymphocytes were restimulated with i ⁇ adiated B7-1 -transfected tumor cells and 25 U/ml IL-2. On day 28, lymphocytes from the culture were cloned by limiting dilution in Iscove's medium supplemented with IL-2 (50 U/ml). Long-term culture of CTL clones was carried out as described (Herin et al., Int. J. Cancer 39:390-396, 1987).
- chromium release assay As described previously (Boon et al., J. Exp. Med. 152: 1184-1193, 1980). Briefly, 1 ,000 chromium- labeled cells in 100 ⁇ l were incubated in 96-well microplates with an equal volume of CTL at different effector to target ratios. Chromium release was measured after 4 h of incubation. For the peptide assay, labeled LB831-EBV cells were incubated for 30 min at 37°C with various concentrations of peptides. CTL were then added and chromium release was measured as described above.
- Transient transfection was performed with the LipofectAMINETM reagent (Life Technologies). Briefly, 5x10 4 293-EBNA cells (293 cells expressing EBV nuclear antigen EBNA-1) were transfected in a flat-bottomed 96-well plate with 100 ng of DNA of the MAGE-Al 2 cDNA or subgenic fragments cloned into pcDNA3 (Invitrogen, Carlsbad, CA), 50 ng of plasmid pcDNA3 containing the HLA-Cw*0701, and 1.5 ⁇ l of LipofectAMINETM. LB373-MEL cells (10,000) were transfected with 150 ng of the HLA-Cw7 construct and 1 ⁇ l of lipofectAMINE.
- Transfected cells were tested in a CTL stimulation assay after 24 h.
- Cloning of the HLA-Cw7 cDNA from LB831-BLC was performed as described previously (Gueguen et al., 1998). Its sequence was identical to allelic subtype Cw*07011, except at position 1087 of the coding sequence where G was found instead of A. This nucleotide change causes the replacement of a threonine by an alanine in the intracytoplasmic domain of the molecule. The same difference has been described between the Cw*0704 and Cw*0711 alleles (Baurain and Coulie, Tissue Antigens 53:510-512, 1999).
- Bladder cell carcinoma LB831 -BLC was transfected by the calcium phosphate precipitation method, as described previously (Traversari et al., Immunogenetics 35:145-152, 1992). 1 x 10 6 cells were transfected with 20 ⁇ g of plasmid pEF-BOS puro-PL3 containing the cDNA B7-1. Briefly, B7-1 was amplified using sense primer 5' - GGGTCCAAATTGTTGGCTTTCACT (SEQ ID NO:7) and anti-sense primer 5'- GAAGAATGCCTCATGATCCCCA (SEQ ID NO:8) in a PCR reaction with cDNA from cell line LB23-EBV as template.
- PCR conditions were as described by Gueguen et al., 1998.
- the B7-1 insert was then cloned into plasmid pEF-BOSpuro-PL3, which was derived from pEF-BOS (Mishizuma and Nagata, Nucleic Acids Res. 18:5322, 1990) by insertion of a puromycin resistance gene and a polylinker.
- Puromycin-resistant LB831-BLC cells were selected in 0.8 ⁇ g/ml puromycin (Sigma, St. Louis, MO) and then cloned by limiting dilution.
- a MAGE-Al 2 cDNA containing the entire open reading frame (ORF) of 945 bp was used as a template for PCR amplification (DePlaen et al., Immunogenetics 40:360-369, 1994). Eight fragments containing the first 195, 342, 525, 540, 591, 651, 683 and 816 nucleotides of the MAGE-Al 2 ORF were amplified using the forward primer
- Taq DNA polymerase (TaKaRa Taq) was used for PCR amplification. A first denaturation step was performed for 5 min at 94°C, and then 25 cycles of amplification were performed as follows:
- RT-PCR was performed to detect the expression of MAGE-A12 in tumor tissues.
- Total RNA purification and cDNA synthesis were conducted as previously described (Weynants et al., Int. J. Cancer 56:826-829, 1994).
- RNA 2 ⁇ g was amplified using sense primer 5'-CGTTGGAGGTCAGAGAACAG-3' (SEQ ID NO:55) and anti-sense primer 5'-GCCCTCCACTGATCTTTAGCAA-3' (SEQ ID NO:56).
- a first denaturation step was done for 4 min at 94°C, and then 32 cycles of amplification were performed as follows: 1 min at 94°C, 2 min at 62°C, and 3 min at 72°C. Cycling was concluded with a final extension step of 15 min at 72°C.
- Example 1 A new antigenic peptide derived from gene MAGE-Al 2 and recognized by an HLA-Cw*0701 restricted CTL of a bladder carcinoma-patient LB831-BLC is a bladder carcinoma cell line expressing at least three antigens recognized by autologous CTL; one of them has already been described (Gueguen et al., J. Immunology 160:6188-6194, 1998).
- An autologous mixed lymphocyte tumor-cell culture (MLTC) was performed by mixing i ⁇ adiated B7-1 transfected LB831-BLC cells cultured in human serum as stimulators and CD8 + T lymphocytes as responders. CD8 + T lymphocytes were sorted with magnetic beads that had been covalently coupled to anti-CD8 Abs
- I ⁇ adiated non-CD8+ cells were added to the mixed culture during the first stimulation. On day 3 IL-2 (50 U/ml) was added. After one week 5x10 5 lymphocytes were restimulated with i ⁇ adiated B7-1 transfected tumor cells and 25 U/ml IL-2. On day 28, lymphocytes from the culture were cloned by limiting dilution in Iscove's medium supplemented with IL-2 (50 U/ml).
- a panel of LB831 -specific CTL-clones was obtained, among them CTL 501D/19 which recognizes the autologous tumor line but not the autologous EBV-transformed B-cells (i.e., it recognizes an antigen distinct from the first three antigens, called LB831-D).
- CTL clone 501D/19 produced TNF when stimulated with LB831-BLC cells, and this production was completely blocked in the presence of anti-HLA class I mAb W6/32 or in the presence of a monoclonal antibody (mAb B 1.23.2) directed against a common determinant of HLA-B and -C molecules.
- HLA typing of LB831 is HLA -A*2403, -A*3, -B*4403, -B*4901, -Cw*0401, and -Cw*07
- this result indicated that the target antigen is presented either by HLA-B*44, B*49, Cw*04 or Cw*07.
- CTL 501D/19 also lysed two allogeneic tumor lines, melanoma line MI13443-MEL and renal carcinoma line LE9211-RCC.
- the targets were: LB831-BLC (the autologous bladder carcinoma line); LB831-EBV (autologous EBV- transformed B cells); LE9211-RCC (an allogeneic HLA-Cw4 and HLA-Cw7-positive renal carcinoma line); MI13443-MEL (an allogeneic HLA-Cw4 and HLA-Cw7-positive melanoma line); and K562 (natural killer target).
- the allogeneic and the autologous tumor lines were pretreated with IFN ⁇ for 1 or 5 days, respectively, before being used as targets. Chromium release was measured after 4 h.
- melanoma cell lines were transiently transfected with Cw*04 or Cw*07 and tested for recognition by CTL 501D/19. Only the Cw*07 transfectants were recognized by CTL.
- LB373-MEL a melanoma cell line derived from an HLA-Cw7-negative patient
- HLA-Cw7 plasmid construct Three thousand CTLs were added to 10,000 stimulator cells, and the production of TNF by the CTLs was measured after 24 hr.
- 293-EBNA cells were cotransfected with expression vectors containing the HLA-Cw*0701 cDNA and with a series of genes including, among others, the MAGE, BAGE, GAGE, RAGE, LAGE N ⁇ - ES0 ' cDNAs which were found to be expressed at a high level in the bladder tumor sample of patient LB831.
- the transfectants were tested for their ability to stimulate TNF production by CTL 50 ID/ 19. Twenty four hours after transfection, the cells were incubated with 3000 cells of CTL 501D/19.
- TNF was only produced by the CTL when stimulated with 293-EBNA cells transfected with HLA-Cw*07 and gene MAGE- Al 2 (Fig. 2). No stimulation was observed with 293-EBNA cells transfected with HLA-Cw7 alone or with the combination of HLA-Cw7 and any other gene.
- MAGE- Al 2 fragments of different lengths were generated by PCR. These subgenic fragments were cloned into pcDNA3 and transfected into 293-EBNA cells together with the HLA-Cw*0701 construct.
- a CTL stimulation assay was conducted with the transfectants (Fig. 3). Transfected cells were incubated for 24 h with CTL 501D/19, and the TNF production in the supernatants was measured by its toxicity to WEHI-164.13 cells. The numbering of the PCR fragments co ⁇ esponds to the nucleotides of the coding region. Cells transfected with fragments of 540 bp or more were capable of stimulating CTL
- Decapeptide VVRIGHLYIL SEQ ID NO:5
- nonapeptide VRIGHLYIL SEQ ID NO:4
- octapeptide RIGHLYIL SEQ ID NO:6 sensitized the autologous lymphoblastoid cell line LB-831-EBV to lysis by CTL 501D/19 (Fig. 4).
- Autologous cell line LB-831-EBV was loaded with MAGE-A12 peptides VRIGHLYIL (SEQ ID NO:4), VVRIGHLYIL (SEQ ID NO:5), or RIGHLYIL (SEQ ID NO:6), and contacted with CTL 501D/19.
- Chromium-labeled cells were pulsed for 30 min with the indicated concentrations of peptides (VRIGHLYIL (SEQ ID NO:4) or RIGHLYIL (SEQ ID NO:6)).
- CTL 501D/19 was added at an effector to target ratio of 10. Chromium release was measured after 4 hours.
- MAGE-Al 2 was determined in tumor samples and/or cell lines of a variety of tumors by RT-PCR. The PCR amplifications were carried out using MAGE-A12 specific primers and conditions as described above. The results of the MAGE-Al 2 RT-PCR amplifications are provided in Table I.
Abstract
Description
Claims
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CA002386088A CA2386088A1 (en) | 1999-10-19 | 2000-10-19 | Mage-a12 antigenic peptides and uses thereof |
AU13356/01A AU1335601A (en) | 1999-10-19 | 2000-10-19 | Mage-a12 antigenic peptides and uses thereof |
JP2001532203A JP2003512057A (en) | 1999-10-19 | 2000-10-19 | MAGE-A12 antigen peptide and use thereof |
EP00975282A EP1222274A2 (en) | 1999-10-19 | 2000-10-19 | Mage-a12 antigenic peptides and uses thereof |
KR1020027004975A KR20020047249A (en) | 1999-10-19 | 2000-10-19 | MAGE-A12 Antigenic Peptides and Uses Thereof |
HK02107155.4A HK1046925A1 (en) | 1999-10-19 | 2002-09-27 | Mage-a12 antigenic peptides and uses thereof |
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WO2001029220A2 true WO2001029220A2 (en) | 2001-04-26 |
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PCT/US2000/028852 WO2001029220A2 (en) | 1999-10-19 | 2000-10-19 | Mage-a12 antigenic peptides and uses thereof |
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EP (1) | EP1222274A2 (en) |
JP (1) | JP2003512057A (en) |
KR (1) | KR20020047249A (en) |
CN (1) | CN1402782A (en) |
AU (1) | AU1335601A (en) |
CA (1) | CA2386088A1 (en) |
HK (1) | HK1046925A1 (en) |
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001074847A2 (en) * | 2000-03-30 | 2001-10-11 | The Government Of The United States Of America Represented By The Secretary, Department Of Health And Human Services | T-cell epitope of mage-12 and related nucleic acids, vectors, cells, compositions and methods of inducing an immune response to cancer |
WO2002094859A2 (en) * | 2001-05-23 | 2002-11-28 | Aventis Pasteur Limited | Mage-a1 peptides for treating or preventing cancer |
WO2003048768A2 (en) * | 2001-12-05 | 2003-06-12 | Sense Proteomic Limited | Protein arrays for allelic variants and uses thereof |
WO2005053738A1 (en) * | 2003-11-21 | 2005-06-16 | Institut Pasteur | Recombinant adenylate cyclase toxin of bordetella induces t cell responses against tumoral antigens |
US8999897B2 (en) | 2002-01-29 | 2015-04-07 | Sense Proteomic Limited | Protein tag comprising a biotinylation domain and method for increasing solubility and determining folding state |
US9370564B2 (en) | 2000-09-15 | 2016-06-21 | Institut Pasteur | Vectors for molecule delivery to CD11b expressing cells |
US9701729B2 (en) | 2013-03-08 | 2017-07-11 | Taiho Pharmaceutical Co., Ltd. | Peptide having 5 linked CTL epitopes |
US10137183B2 (en) | 2013-10-21 | 2018-11-27 | Taiho Pharmaceutical Co., Ltd. | Peptide compositions having 4 linked CTL epitopes and uses thereof |
US11306131B2 (en) * | 2011-09-15 | 2022-04-19 | The United States Of America, As Represented By The Secretary, Department Of Health And Human Services | T cell receptors recognizing HLA-A1- or HLA-CW7-restricted mage |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2113253B1 (en) * | 2008-04-30 | 2010-03-31 | Immatics Biotechnologies GmbH | Novel formulations of tumour-associated peptides binding to human leukocyte antigen (HLA) class I or II molecules for vaccines |
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WO2001074847A2 (en) * | 2000-03-30 | 2001-10-11 | The Government Of The United States Of America Represented By The Secretary, Department Of Health And Human Services | T-cell epitope of mage-12 and related nucleic acids, vectors, cells, compositions and methods of inducing an immune response to cancer |
WO2001074847A3 (en) * | 2000-03-30 | 2002-03-21 | Us Health | T-cell epitope of mage-12 and related nucleic acids, vectors, cells, compositions and methods of inducing an immune response to cancer |
US10004794B2 (en) | 2000-09-15 | 2018-06-26 | Institut Pasteur | Vectors for molecule delivery to CD11b expressing cells |
US9370564B2 (en) | 2000-09-15 | 2016-06-21 | Institut Pasteur | Vectors for molecule delivery to CD11b expressing cells |
WO2002094859A2 (en) * | 2001-05-23 | 2002-11-28 | Aventis Pasteur Limited | Mage-a1 peptides for treating or preventing cancer |
WO2002094859A3 (en) * | 2001-05-23 | 2003-04-10 | Aventis Pasteur | Mage-a1 peptides for treating or preventing cancer |
EP1742062A3 (en) * | 2001-12-05 | 2008-09-10 | Sense Proteomic Limited | Protein arrays for allelic variants and uses thereof |
GB2384239A (en) * | 2001-12-05 | 2003-07-23 | Sense Proteomic Ltd | Arrays of protein variants |
US10870925B2 (en) | 2001-12-05 | 2020-12-22 | Sengenics Corporation Pte Ltd | Arrays |
EP1742062A2 (en) * | 2001-12-05 | 2007-01-10 | Sense Proteomic Limited | Protein arrays for allelic variants and uses thereof |
WO2003048768A3 (en) * | 2001-12-05 | 2003-11-20 | Sense Proteomic Ltd | Protein arrays for allelic variants and uses thereof |
JP4781628B2 (en) * | 2001-12-05 | 2011-09-28 | センス プロテオミック リミテッド | Protein arrays for allelic variants and uses thereof |
WO2003048768A2 (en) * | 2001-12-05 | 2003-06-12 | Sense Proteomic Limited | Protein arrays for allelic variants and uses thereof |
JP2005512055A (en) * | 2001-12-05 | 2005-04-28 | センス プロテオミック リミテッド | Protein arrays for allelic variants and uses thereof |
US8999897B2 (en) | 2002-01-29 | 2015-04-07 | Sense Proteomic Limited | Protein tag comprising a biotinylation domain and method for increasing solubility and determining folding state |
US9410139B2 (en) | 2003-11-21 | 2016-08-09 | Institut Pasteur | Recombinant adenylate cyclase toxin of bordetella induces T cell responses against tumoral antigens |
WO2005053738A1 (en) * | 2003-11-21 | 2005-06-16 | Institut Pasteur | Recombinant adenylate cyclase toxin of bordetella induces t cell responses against tumoral antigens |
US11306131B2 (en) * | 2011-09-15 | 2022-04-19 | The United States Of America, As Represented By The Secretary, Department Of Health And Human Services | T cell receptors recognizing HLA-A1- or HLA-CW7-restricted mage |
US9701729B2 (en) | 2013-03-08 | 2017-07-11 | Taiho Pharmaceutical Co., Ltd. | Peptide having 5 linked CTL epitopes |
US10137183B2 (en) | 2013-10-21 | 2018-11-27 | Taiho Pharmaceutical Co., Ltd. | Peptide compositions having 4 linked CTL epitopes and uses thereof |
Also Published As
Publication number | Publication date |
---|---|
WO2001029220A3 (en) | 2002-03-07 |
HK1046925A1 (en) | 2003-01-30 |
CA2386088A1 (en) | 2001-04-26 |
JP2003512057A (en) | 2003-04-02 |
AU1335601A (en) | 2001-04-30 |
CN1402782A (en) | 2003-03-12 |
EP1222274A2 (en) | 2002-07-17 |
KR20020047249A (en) | 2002-06-21 |
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