title: Down-regulation of macaque gammadelta + T cells in lymphoid compartments after rectal infection with SIVsmmPBj14.
abstract: The dynamics of T cells expressing the gammadelta T-cell receptor in mucosae and other compartments during the course of human immunodeficiency virus (HIV)-1 infection are poorly understood. To examine the impact of an acquired immunodeficiency syndrome virus on the gammadelta + T-cell population, rectal inoculation of macaques with simian immunodeficiency virus (SIV)-PBj14 was used as a model. After rectal inoculation, five macaques were sacrificed on days 4, 5, or 7 and then assessed for changes in the gammadelta T-cell receptor repertoire in different lymphoid compartments. There was decreased representation of gammadelta + T cells in the intestinal mucosae, blood, and spleens. Overall, the reduced number of total gammadelta + T cells was consistent with decreases in the Vgamma or Vdelta T-cell sub-populations. Nevertheless, there was no consistent deletion or expansion of a selected Vdelta + or Vdelta + cell sub-population. These results demonstrate that SIV-PBj14 replication and dissemination after mucosal inoculation resulted in a decline of detectable gammadelta + T cells, suggesting that macaque gammadelta + T cells are susceptible to down-regulation or destruction during acute SIV-PBj14 infection.
authors.affiliation: Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA. zchen@caregroup.harvard.edu
authors.forename: Z W
authors.initials: ZW
authors.lastname: Chen
authors.forename: Y
authors.initials: Y
authors.lastname: Shen
authors.forename: I C
authors.initials: IC
authors.lastname: Davis
authors.forename: L
authors.initials: L
authors.lastname: Shen
authors.forename: N L
authors.initials: NL
authors.lastname: Letvin
authors.forename: P N
authors.initials: PN
authors.lastname: Fultz
mesh_terms: D000818:Animals; D015658:HIV Infections / Q000276:immunology; D006801:Humans; D007413:Intestinal Mucosa / Q000276:immunology; D018655:Lymphocyte Count; D008254:Macaca nemestrina; D017260:Receptor-CD3 Complex, Antigen, T-Cell / Q000032:analysis; D016692:Receptors, Antigen, T-Cell, gamma-delta / Q000032:analysis*; D012007:Rectum; D016097:Simian Acquired Immunodeficiency Syndrome / Q000097:blood / Q000276:immunology* / Q000635:transmission; D015302:Simian Immunodeficiency Virus / Q000276:immunology*; D013154:Spleen / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D017260:Receptor-CD3 Complex, Antigen, T-Cell; D016692:Receptors, Antigen, T-Cell, gamma-delta