title: Gamma/delta T cells provide innate immunity against renal cell carcinoma.
abstract: Host immune function plays a certain role against the development of renal cell carcinomas (RCCs), but the mechanism is not entirely understood. Human gamma/delta (gamma/delta) T cells defend the body against infection. In this study, we clarify the role of gamma/delta T cells in the surveillance system against RCCs by analyzing the gamma/delta T cells in peripheral blood mononucleocytes (PBMs) and tumor infiltrating lymphocytes (TILs) from 41 patients with RCCs. The results showed that the number of gamma/delta T cells expressing V gamma 2 and V delta 2 in variable elements of TCR was elevated in the PBMs in 10 patients, but not in any of 32 healthy individuals. The proportion of patients with an elevated number of gamma/delta T cells (> 10%) increased with cancer stage. The level of the gamma/delta T cells decreased after surgery. The gamma/delta T cells in the TILs were more activated than those in the PBMs. Evaluation of the junctional diversity of TCR V gamma 2 and V delta 2 chains showed that the increased peripheral blood gamma/delta T cells were oligoclonal rather than polyclonal. Taken together, our findings suggest that gamma/delta T cells recognize certain RCC-related antigens and play a role in the surveillance system against RCCs.
authors: Department of Urology, Tokyo Women's Medical University, 8-1 Kawada-cho, Shinjuku-ku, Tokyo 162-8666, Japan.
authors: H
authors: H
authors: Kobayashi
authors: Y
authors: Y
authors: Tanaka
authors: J
authors: J
authors: Yagi
authors: H
authors: H
authors: Toma
authors: T
authors: T
authors: Uchiyama
mesh_terms: D000328:Adult; D000368:Aged; D002292:Carcinoma, Renal Cell / Q000276:immunology* / Q000517:prevention & control; D016022:Case-Control Studies; D003001:Cloning, Molecular; D005260:Female; D006801:Humans; D007150:Immunohistochemistry; D007680:Kidney Neoplasms / Q000276:immunology* / Q000517:prevention & control; D007963:Leukocytes, Mononuclear / Q000166:cytology / Q000378:metabolism; D016246:Lymphocytes, Tumor-Infiltrating / Q000166:cytology / Q000378:metabolism; D008297:Male; D008856:Microscopy, Fluorescence; D008875:Middle Aged; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000378:metabolism / Q000502:physiology*; D017422:Sequence Analysis, DNA; D013601:T-Lymphocytes / Q000378:metabolism* / Q000502:physiology*; D013997:Time Factors
chemical_list: D016692:Receptors, Antigen, T-Cell, gamma-delta