Tumor Immunity, Autoimmunity, and Immune Surveillance of Genetic Integrity

Tumor Immunity, Autoimmunity, and Immune Surveillance of Genetic Integrity

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Mice immunized with DNA. The top mouse was immunized with control DNA, while the bottom mouse was immunized with DNA encoding a melanoma/melanocyte autoantigen tyrosinase-related protein 2. The bottom mouse developed autoimmunity manifested as depigmentation.

Mice immunized with DNA. The top mouse was immunized with control DNA, while the bottom mouse was immunized with DNA encoding a melanoma/melanocyte autoantigen tyrosinase-related protein 2. The bottom mouse developed autoimmunity manifested as depigmentation.

A primary focus of our laboratory is to better understand the host response to cancer. Our research has shown that the immune response to cancer is directed in large part toward self antigens also expressed by normal tissues. The finding that immune recognition of cancer is directed against self antigens raises the issue of how physiological mechanisms that maintain immune tolerance to self (to prevent autoimmunity) also form a barrier to cancer immunity. We have using melanoma models to investigate the similarities and differences between mechanisms for autoimmunity against normal tissues and tumor immunity (see Figure).

Strategies to break immune tolerance are being actively investigated in models of melanoma, breast cancer, prostate cancer, soft tissue sarcoma, and lymphoma, including: a) rational introduction of mutations into self proteins for active immunization; b) the application of cytokine adjuvants delivered as DNA to recruit and activate antigen-presenting cells (see Figure below) and to regulate T cells; c) modulation of the immune system using agonist monoclonal antibodies against the glucocorticoid-induced TNF receptor family protein (GITR) and other molecules expressed by lymphocytes; and d) the use of alkylating agent to induce homeostatic activation of immune cells and other host effects that promote cancer immunity and autoimmunity.

Another area of particular interest is how the adaptive immune system ignores or recognizes and responds to mutations. In this regard, we are investigating how the immune system reacts to different types of mutations in self proteins in healthy tissues of normal mice (to understand how the immune system might survey changes in genetic integrity) and in tumors. A goal is to understand adaptive immune recognition of mutations in incipient tumors and in tumors during progression (invasion into normal tissues and metastasis). The consequences of recognition of different types of mutations is investigated, including point mutations altering individual amino acids, premature stop codons creating truncated polypeptides, and nucleotide deletions producing altered reading frames. Immune recognition of alternative transcripts created through differential splicing or by cryptic translation start sites is also under investigation.

For these studies, we are using transgenic mouse models of cancer and transplantable tumor models to understand the roles of different immune and inflammatory cell populations in tumors and their draining lymph nodes. These models are used for at dissecting the roles for T cells, B cells, NK cells, NKT cells, and myeloid cells in promoting and/or preventing de novo tumors and their progression. In particular, we are applying intravital microscopy to follow the relationship of these different populations in three-dimensional space over time.

Recruitment of dendritic cells into epidermis by injection of DNA encoding the cytokine GM-CSF

Recruitment of dendritic cells into epidermis by injection of DNA encoding the cytokine GM-CSF.

Engelhorn ME, Guevara-Patiño JA, Noffz G, Hooper AT, Lou O, Gold JS, Kappel BJ, Houghton AN. Autoimmunity and tumor immunity induced by immune responses to mutations in self. Nature Med. 2006; 2:198-206

Guevara-Patino JA, Engelhorn ME, Turk MJ, Liu C, Duan F, Rizzuto G, Cohen AD, Merghoub T, Wolchok JD, Houghton AN. Optimization of a self antigen for presentation of multiple epitopes in cancer immunity. J Clin Invest. 2006;116(5):1382-90

Cohen AD, Diab A, Perales M-A, Wolchok JD, Rizzuto G, Merghoub T, Huggins D, Liu C, Turk MJ, Restifo NP, Sakaguchi S, Houghton AN. Agonist anti-GITR antibody enhances vaccine-induced CD8+ T-cell responses and tumor immunity. Cancer Res 2006 66(9):4904-12

Ramirez-Montagut T, Chow A, Hirschhorn-Cymerman D, Terwey TH, Kochman AA, Lu S, Miles RC, Sakaguchi S, Houghton AN, van den Brink MR. Glucocorticoid-induced TNF receptor family related gene activation overcomes tolerance/ignorance to melanoma differentiation antigens and enhances antitumor immunity. J Immunol. 2006;176(11):6434-42

Goldberg SM, Bartido SM, Gardner JP, Guevara-Patiño JA, Montgomery SC, Perales MA, Maughan MF, Dempsey J, Donovan GP, Olson WC, Houghton AN, Wolchok JD. Comparison of two cancer vaccines targeting tyrosinase: plasmid DNA and recombinant alphavirus replicon particles. Clin. Cancer Res. 2005; 11(22):8114-21

Segal N, Blachere NE, Guevara-Patino, Gallardo HF, Shiu HYA, Viale A, Antonescu CR, Wolchok JD, Houghton AN. Identification of cancer-testes genes expressed by melanoma and soft tissue sarcoma using bioinformatic recognition for antigen discovery. Cancer Immunity 2005; 5:2-10

Segal NH, Blachere NE, Shiu HYA, Leejee S, Antonescu CR, Lewis JL, Wolchok JD, Houghton AN. Antigens recognized by autologous antibodies of patients with soft tissue sarcoma. Cancer Immunity 2005; 5:4-11

Palomba ML, Roberts WK, Dao T, Manukian G, Guevara-Patino, Wolchok JD, Scheinberg DA, Houghton AN. CD8+ T-cell-dependent immunity following xenogeneic DNA immunization against CD20 in a tumor challenge model of B-cell lymphoma. Clin Cancer Res. 2005; 11:370-379

Gregor PD, Wolchok JD, Turaga V, Latouche J-B, Sadelain M, Bacich D, Heston WDW, Houghton AN, Scher HI. Induction of autoantibodies to syngeneic prostate-specific membrane antigen by xenogeneic vaccination. Int. J. Cancer 2005; 116:415-421

Turk MJ, Guevara-Patino JA, Rizzuto GA, Engelhorn ME, Houghton AN. Concomitant tumor immunity to a poorly immunogenic melanoma is prevented by regulatory T cells. J Exp Med. 2004;200:771-782

Gregor PD, Wolchok JD, Ferrone CR, Buchinshky H, Guevara-Patino JA, Perales MA, Mortazavi F, Bacich D, Heston W, Latouche JB, Sadelain M, Allison JP, Scher HI, Houghton AN. CTLA-4 blockade in combination with xenogeneic DNA vaccines enhances T-cell responses, tumor immunity and autoimmunity to self antigens in animal and cellular model systems. Vaccine. 2004; 22:1700-1708

Gold JS, Guevara-Patiño JA, Ferrone CR, Hawkins WG, Dyall R, Engelhorn ME, Wolchok JD, Lewis JJ, Houghton AN. A single heteroclitic epitope determines cancer immunity following xenogeneic DNA immunization against a tumor differentiation antigen. J Immunol 2003; 170:5188-5194

Srinivasan R, Houghton AN, Wolchok JD. Induction of autoantibodies against tyrosinase-related proteins following DNA vaccination: unexpected reactivity to a protein paralogue. Cancer Immunity 2002; 2:8-17

Trcka J, Moroi Y, Clynes RA, Goldberg SM, Bergtold A, Perales M-A, Ma M, Ferrone CR, Carroll MC, Ravetch JV, Houghton AN. Redundant and alternative roles for activating Fc receptors and complement in an antibody-dependent model of autoimmune vitiligo. Immunity 2002; 16:861-868

Houghton AN, Gold JS, Blachere NE. Immunity against cancer: lessons learned from melanoma. Cur Opin Immunol. 2001;13:134-140.

Hawkins WG, Gold JS, Dyall R, Wolchok J, Hoos A, Bowne WB, Srinivasan R, Houghton AN, Lewis JJ. Immunization with DNA coding for gp 100 results in CD4+ T cell independent antitumor immunity. Surgery 2000:128:273-80

Dhodapkar MV, Young JW,Chapman PB, Cox WI, Fonteneau JF, Amigorena S, Houghton AN, Steinman RMl, Bhardwaj N. Paucity of functional T cell memory to melanoma antigens in healthy donors and melanoma patients. Clin Cancer Res 2000; 6:4831-4838

Castellino F, Boucher PE, Eichelberg K, Mayhew M, Rothman JE, Houghton AN, Germain RN. Receptor-mediated uptake to antigen/heat shock protein complexes results in major histocompatibility complex Class I antigen presentation via two distinct processing pathways. J Exp Med 2000; 191:1957-1964

Moroi Y, Mayhew M, Trcka J, Hoe MH, Takechi Y, Hartl FU, Rothman JE, Houghton AN. Induction of cellular immunity by immunization with novel hybrid peptides complexed to heat shock protein 70. Proc Natl Acad Sci U S A 2000;.97:3485-3490

Bowne WB, Srinivasan R, Wolchok JD, Hawkins WG, Blachere NE, Dyall R, Lewis JJ, Houghton AN. Coupling and uncoupling of tumor immunity and autoimmunity. J Exp Med. 1999;190:1717-1722.

Dyall R, Bowne WB, Weber LW, LeMaoult J, Szabo P, Moroi Y, Piskun G, Lewis JJ, Houghton AN, Nikolic-Zugic J. Heteroclitic immunization induces tumor immunity. J Exp Med. 1998;188:1553-1561.

Wang S, Bartido S, Yang G, Qin, Moroi Y, Panageas KS, Lewis JJ, Houghton AN. A role for a melanosome transport signal in accessing the MHC Class II pres.ation pathway and in eliciting CD4+ T cell response. J Immunol 1999; 163:5820-5826

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Takechi Y, Hara I, Naftzger C, Xu Y, Houghton AN. A melanosomal membrane protein is a cell surface target for melanoma therapy. Clin Cancer Res. 1996;2:1837-1842.

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Takahashi T, Chapman PB, Yang SY, Hara I, Vijayasaradhi S, Houghton AN. Reactivity of autologous CD4+ T lymphocytes against human melanoma. Evidence for a shared melanoma antigen presented by HLA-DR15. J Immunol. 1995;154:772-779.

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Vijayasaradhi S, Bouchard B, Houghton AN. The melanoma antigen gp75 is the human homologue of the mouse b (brown) locus gene product. J Exp Med. 1990;171:1375-1380.

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