Document 0795 DOCN M95A0795 TI TCR gamma delta cells: mysterious cells of the immune system. DT 9510 AU Sciammas R; Tatsumi Y; Sperling AI; Arunan K; Bluestone JA; Department of Pathology, Ben May Institute, University of; Chicago, Ill., USA. SO Immunol Res. 1994;13(4):268-79. Unique Identifier : AIDSLINE MED/95341110 AB Gamma delta cells participate in pathogenic infections and autoimmune conditions, yet, almost a decade after their discovery, little is known regarding their TCR repertoire or effector functions. Unlike MHC-restricted antigen recognition employed by TCR alpha beta cells, TCR gamma delta cells can recognize whole unprocessed antigens in an MHC- independent manner. The nature of positive and negative selection used to shape the repertoire of TCR gamma delta cells is unclear, especially in the nonlymphoid tissues where these cells predominate. While TCR gamma delta cells express an activated phenotype and are present in pathological conditions, their roles in immunological protein is unknown. This review will focus on our efforts to study these issues of TCR gamma delta biology. DE Animal Antigen Presentation/*IMMUNOLOGY Antigens, Thy-1/BIOSYNTHESIS/DRUG EFFECTS Arthritis/CHEMICALLY INDUCED/IMMUNOLOGY Collagen/PHARMACOLOGY Cyclosporine/PHARMACOLOGY CD4-Positive T-Lymphocytes/*IMMUNOLOGY/MICROBIOLOGY CD8-Positive T-Lymphocytes/*IMMUNOLOGY/MICROBIOLOGY Human Listeria Infections/IMMUNOLOGY Mice Mice, Transgenic Models, Immunological Receptors, Antigen, T-Cell, gamma-delta/*IMMUNOLOGY Schistosomiasis/IMMUNOLOGY JOURNAL ARTICLE REVIEW REVIEW, TUTORIAL SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).