title: Gammadelta T cell receptor repertoire in blood and colonic mucosa of rhesus macaques.
abstract: Although their precise roles are not well defined, gammadelta T lymphocytes are recognized as regular components of immune responses. These cells express a limited T cell receptor repertoire and they can be stimulated by soluble ligands without conventional processing and presentation by major histocompatibility antigens. Progress in this area has been limited by the substantial differences between murine and human gammadelta T cells and the lack of knowledge about these cells in nonhuman primates. We used molecular analysis of T cell receptor diversity to characterize gammadelta T cell populations from peripheral blood and colon of rhesus macaques (Macaca mulatta). The gammadelta T cell receptor diversity was limited and distinct for these tissue compartments, particularly in the TCRGV2 family. Furthermore, the TCRDV1 + subset of peripheral blood gammadelta T cells showed signs of progressive oligoclonalization as a function of age. Similar observations have been reported for human tissue samples and our results validate rhesus macaques as an appropriate animal model for studying primate gammadelta T cell populations.
authors.affiliation: Wisconsin Regional Primate Research Center, University of Wisconsin, Madison 53715, USA. erakasz@primate.wisc.edu
authors.forename: E
authors.initials: E
authors.lastname: Rakasz
authors.forename: A V
authors.initials: AV
authors.lastname: MacDougall
authors.forename: M T
authors.initials: MT
authors.lastname: Zayas
authors.forename: J L
authors.initials: JL
authors.lastname: Helgelund
authors.forename: T J
authors.initials: TJ
authors.lastname: Ruckward
authors.forename: G
authors.initials: G
authors.lastname: Hatfield
authors.forename: M
authors.initials: M
authors.lastname: Dykhuizen
authors.forename: J L
authors.initials: JL
authors.lastname: Mitchen
authors.forename: P S
authors.initials: PS
authors.lastname: Evans
authors.forename: C D
authors.initials: CD
authors.lastname: Pauza
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D012809:Colon, Sigmoid / Q000166:cytology / Q000276:immunology; D022801:Complementarity Determining Regions / Q000032:analysis; D014644:Genetic Variation; D007413:Intestinal Mucosa / Q000166:cytology / Q000276:immunology*; D007963:Leukocytes, Mononuclear / Q000276:immunology; D008253:Macaca mulatta / Q000097:blood / Q000276:immunology*; D023421:Models, Animal; D008967:Molecular Biology; D016133:Polymerase Chain Reaction; D012333:RNA, Messenger / Q000032:analysis; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000097:blood / Q000737:chemistry / Q000235:genetics*; D015203:Reproducibility of Results
chemical_list: D022801:Complementarity Determining Regions; D012333:RNA, Messenger; D016692:Receptors, Antigen, T-Cell, gamma-delta