@article{18064, keywords = {Amino Acid Sequence, Base Sequence, Humans, Molecular Sequence Data, Receptors, Antigen, T-Cell, gamma-delta, Sarcoidosis, T-Lymphocytes}, author = {Tamura N and Suzuki K and YAMAMOTO T and Kira S}, title = {[The gamma delta T-cell receptors in sarcoidosis].}, abstract = {
T-cells recognize specific antigen (s) through the T-cell antigen receptors (TCR). gamma delta T-cells compose a minor population of the peripheral blood lymphocytes (PBL). These lymphocytes play a central role in recognizing the mycobacterial antigens and granuloma formation in tuberculosis and leprosy. Significant increase of gamma delta T-cells in PBL is observed in a subgroup of sarcoidosis. The majority of gamma delta T-cells showed V gamma 9/V delta 2 recombination, which is common in normal blood. To evaluate the clonality of the increased gamma delta T-cells in PBL, several V gamma 9 and V delta 2 cDNA clones were established. Analysis of V-J junctional sequences of V gamma 9 clones revealed oligoclonal expansion in some cases. Most of V delta 2 clones showed unique sequences. Although no clonal expansion of gamma delta T-cells were observed, TCR-gamma chain might recognize limited numbers of putative antigens in sarcoidosis.
}, year = {1994}, journal = {Nihon rinsho. Japanese journal of clinical medicine}, volume = {52}, pages = {1473-9}, month = {1994 Jun}, issn = {0047-1852}, language = {jpn}, }