Lineage-specific T-cell reconstitution following in vivo CD4+ and CD8+ lymphocyte depletion in nonhuman primates.

J.C. Engram, B. Cervasi, J.A.M. Borghans, N.R. Klatt, S.N. Gordon, A. Chahroudi, J.G. Else, R.S. Mittler, D.L. Sodora, R.J. de Boer, J.M. Brenchley, G. Silvestri, M. Paiardini

Research output: Contribution to journalArticleAcademicpeer-review


Many features of T-cell homeostasis in primates are still unclear, thus limiting our understanding of AIDS pathogenesis, in which T-cell homeostasis is lost. Here, we performed experiments of in vivo CD4+ or CD8+ lymphocyte depletion in 2 nonhuman primate species, rhesus macaques (RMs) and sooty mangabeys (SMs). Whereas RMs develop AIDS after infection with simian immunodeficiency virus (SIV), SIV-infected SMs are typically AIDS-resistant. We found that, in both species, most CD4+ or CD8+ T cells in blood and lymph nodes were depleted after treatment with their respective antibodies. These CD4+ and CD8+ lymphocyte depletions were followed by a largely lineage-specific CD4+ and CD8+ T-cell proliferation, involving mainly memory T cells, which correlated with interleukin-7 plasma levels. Interestingly, SMs showed a faster repopulation of naive CD4+ T cells than RMs. In addition, in both species CD8+ T-cell repopulation was faster than that of CD4+ T cells, with CD8+ T cells reconstituting a normal pool within 60 days and CD4+ T cells remaining below baseline levels up to day 180 after depletion. While this study revealed subtle differences in CD4+ T-cell repopulation in an AIDS-sensitive versus an AIDS-resistant species, such differences may have particular relevance in the presence of active SIV repli cation, where CD4+ T-cell destruction is chronic.
Original languageEnglish
Pages (from-to)748-758
Number of pages11
Issue number5
Publication statusPublished - 2010


  • antibodies
  • interleukin-7
  • lymphocyte depletion
  • primates
  • t-lymphocytes
  • lymphocytes
  • infections


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