The long-term objective is to define the role of MHC class I transplantation antigens in tumor progression, in order to identify immunological and molecular interactions which might be relevant to the origins and treatment of human cancer. These studies are intended to address the molecular origin and functional significance of novel class I products on murine tumors. The experiments are intended to probe the generality and significance of the phenomena defined by the UV-induced C3H fibrosarcoma, 1591. This tumor expresses at least three novel class I products, encoded by genes which appear to have been derived by recombination. Two complementary sets of studies are proposed. First, DNA from a large variety of tumors will be examined by genomic Southern blot analysis for evidence of class I alterations comparable to those observed in 1591. A variety of chemotherapeutic and mutagenic treatments will be tested for their potential to elicit class I alterations in vitro. These studies will address the etiologic component of class I alterations. The second set of experiments involve the characterization of the novel class I product expressed on the C3Hf adenocarcinoma, LT85. Peptide mapping studies suggest that, as in the case of 1591, the gene encoding the LT85 molecule was generated by recombination from an endogenous H-2 gene. Furthermore, 40% of the C3Hf tumors tested express immunologically cross-reactive molecules suggesting that the LT85 mutational event occurs reproducibly. The gene encoding this novel antigen will be cloned, and its origin identified. Specific molecular probes will be generated, and the generality of the LT85 event will be analyzed in other C3Hf tumors. The potential reproducibility of the class I alterations in the C3Hf system might afford histological identification of the activation of altered class I molecules in nascent C3Hf tumors and to help elucidate the subtle consequences of their expression on the process of tumorigenesis. Given the complexity of the human HLA system as well as the absence of appropriate transplant hosts to determine the immunogenicity of human tumors, immunobiological studies of genetically defined models, such as those described here, are essential in providing fundamental biological information applicable to the molecular characterization of comparable phenomena in human disorders.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA037099-05
Application #
3174787
Study Section
Immunobiology Study Section (IMB)
Project Start
1984-03-01
Project End
1992-02-28
Budget Start
1988-03-01
Budget End
1989-02-28
Support Year
5
Fiscal Year
1988
Total Cost
Indirect Cost
Name
University of California Berkeley
Department
Type
DUNS #
094878337
City
Berkeley
State
CA
Country
United States
Zip Code
94704
Gelber, C; Eisenbach, L; Feldman, M et al. (1991) T-cell subset analysis of 3LL tumor growth. Int J Cancer Suppl 6:69-72
Kuhner, M; Watts, S; Klitz, W et al. (1990) Gene conversion in the evolution of both the H-2 and Qa class I genes of the murine major histocompatibility complex. Genetics 126:1115-26
Vogel, J M; Nieto, M C; Fischer, A et al. (1990) Overlapping palindromic sequences associated with somatic deletion and meiotic recombination of MHC class I genes. Mol Immunol 27:875-86
Kuhner, M K; Goodenow, R S (1989) DNA sequences of mouse H-2 and Qa genes. Immunogenetics 30:458-64
Linsk, R; Watts, S; Fischer, A et al. (1989) The tumor-rejection antigens of the 1591 ultraviolet fibrosarcoma. Potential origin and evolutionary implications. J Exp Med 169:1043-58
Watts, S; Davis, A C; Gaut, B et al. (1989) Organization and structure of the Qa genes of the major histocompatibility complex of the C3H mouse: implications for Qa function and class I evolution. EMBO J 8:1749-59
Nieto, M C; Song, E S; McKinney, D et al. (1989) The association of H-2Ld with human beta-2 microglobulin induces localized conformational changes in the alpha-1 and -2 superdomain. Immunogenetics 30:361-9
Vogel, J M; Morse, R Y; Goodenow, R S (1989) A novel H-2K splice form: predictions for other alternative H-2 splicing events. Immunogenetics 29:33-43
Vogel, J M; McMillan, M; Martin, W J et al. (1989) Evidence that derivation of the adenocarcinoma LT85 predated establishment of the H-2km2 mutation in a C3Hf colony of mice. J Immunogenet 16:363-71
Vogel, J M; Davis, A C; McKinney, D M et al. (1988) Molecular characterization of the C3HfB/HeN H-2Kkm2 mutation. Implications for the molecular basis of alloreactivity. J Exp Med 168:1781-800

Showing the most recent 10 out of 15 publications