title: V gamma gene usage in peripheral blood gamma delta T cells.
abstract: The majority (50-90%) of gamma delta T cells in the peripheral blood of adult individuals expresses a T-cell receptor (TCR) which uses V gamma 9 and V delta 2 as variable elements. Little is known about the distribution of other V gamma gene elements in the remaining 10-50% of gamma delta T cells. Here we have studied the V gamma gene expression in peripheral blood gamma delta T cells by 3-color flow cytometry analysis applying established monoclonal antibodies (mAb) directed against V gamma 9 and V gamma 4, as well as a novel mAb directed against V gamma 2, V gamma 3 and V gamma 4. On average, 79.9% of gamma delta T cells expressed V gamma 9, 11.9% V gamma 2/V gamma 3, 4.4% V gamma 4, and 7.5% one of the remaining V gamma 5, V gamma 8, V gamma 10 or V gamma 11 elements. There were remarkable variations in the gamma delta subset composition between individual donors. The majority (69.8%) of V gamma 2/V gamma 3/V gamma 4-bearing cells co-expressed V delta 1, while on average only 17.8% of V gamma 2/V gamma 3/V gamma 4-bearing cells co-expressed V delta 2. This is in contrast to V gamma 9-bearing gamma delta T cells, of which 83.1% used V delta 2 and only 12.7% V delta 1. Taken together, this data identifies V gamma 2/V gamma 3 as the second most frequently used set of V gamma elements in human peripheral blood gamma delta T cells.
authors.affiliation: Department of Immunology, Paul Ehrlich Institute, Langen, Germany.
authors.forename: S
authors.initials: S
authors.lastname: Schondelmaier
authors.forename: D
authors.initials: D
authors.lastname: Wesch
authors.forename: K
authors.initials: K
authors.lastname: Pechhold
authors.forename: D
authors.initials: D
authors.lastname: Kabelitz
mesh_terms: D000328:Adult; D000911:Antibodies, Monoclonal; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000032:analysis / Q000235:genetics*; D016176:T-Lymphocyte Subsets / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D016692:Receptors, Antigen, T-Cell, gamma-delta