Publication de 6 numéros par an
ISSN Imprimer: 1040-8401
ISSN En ligne: 2162-6472
Indexed in
Tumor Cell Recognition by Lymphocytes: Is the MHC Always Essential?
RÉSUMÉ
Phenotypic and functional analyses of tumor-infiltrating lymphocytes (TILs) used in clinical trials revealed that cells other than CTLs can have antitumor efficacy. This observation led us to search for mechanisms for tumor recognition by lymphocytes that utilize alternatives to surface structures of tumor cells, for example, MHC antigen complexes; the latter are generally believed to be the immunogenic platforms for CTLs. Therefore, as a possible source of immunostimulatory activity, we compared the ability of plasma membrane components of tumor cell Lines with first secreted tumor cell components and then intracellular tumor components to act as mitogenic sources for human TIL lines. Surprisingly, the latter was found to be most potent, particularly Oncoimmunin-L, which is a 45-kDa protein with sequence similarity to members of the serpin family of proteins. This protein, which has at least a 31% sequence identity to human leukocyte elastase inhibitor and stimulates [3H]-thymidine incorporation into the DNA of human TILs, may be found in the cytosol of many tumor cells. Taken together with our earlier work in which a 36-kDa protein, also of tumor cytosolic origin, was shown to induce differentiation of myeloid cells, we propose soluble factors derived from tumor cells as a pathophysiological source of tumor immunogenicity. Moreover, detailed biochemical and biophyscial characterization of tumor cell-immunocyte interactions will define the tumor immunoenvironment.
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Efron David T., Barbul Adrian, Modulation of inflammation and immunity by arginine supplements, Current Opinion in Clinical Nutrition and Metabolic Care, 1, 6, 1998. Crossref
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Rubinstein Mark P., Kadima Andre N., Salem Mohamed L., Nguyen Christophe L., Gillanders William E., Nishimura Michael I., Cole David J., Transfer of TCR Genes into Mature T Cells Is Accompanied by the Maintenance of Parental T Cell Avidity, The Journal of Immunology, 170, 3, 2003. Crossref