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JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
Bone Marrow CD34 + Progenitor Cells from HIV-Infected Patients Show an Impaired T Cell Differentiation Potential Related to Proinflammatory Cytokines.
AIDS Research and Human Retroviruses 2017 June
The impact of HIV infection on the frequency and differentiation capability of CD34+ bone marrow hematopoietic progenitor cells (BM-HPCs) is still debated, having a possible primary role in antiretroviral-induced immunoreconstitution. We investigated the influence of HIV replication or proinflammatory cytokines on lymphopoietic capability of BM-HPCs from seven viremic (VR) and five nonviremic (NVR) HIV-infected patients. We found that BM-HPCs from VR patients were unable to differentiate in vitro toward T cells, and produced proinflammatory cytokines in the absence of viral replication. In contrast, the lymphoid differentiation potential of BM-HPCs was partially restored in successfully antiretroviral therapy-treated patients. We also showed that TLR8 triggering induced BM-HPCs from healthy donors to release proinflammatory cytokines affecting T cell differentiation. These data suggest that in HIV-infected patients, the lymphopoiesis capability of BM-HPCs may be modulated by a virus-driven autocrine mechanism involving proinflammatory cytokines.
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