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Science 11 November 1988:
Vol. 242. no. 4880, pp. 919 - 922
DOI: 10.1126/science.2460922
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Articles

Science, Vol 242, Issue 4880, 919-922
Copyright © 1988 by American Association for the Advancement of Science

articles

Infection and replication of HIV-1 in purified progenitor cells of normal human bone marrow

TM Folks, SW Kessler, JM Orenstein, JS Justement, ES Jaffe, and AS Fauci

Laboratory of Immunoregulation, National Institutes of Health, Bethesda, MD 20892.

Myeloid progenitor cells were highly purified from normal human bone marrow by positive immunoselection with high-affinity monoclonal antibodies linked to magnetic beads and were successfully infected in vitro with the human immunodeficiency virus type 1 (HIV-1). From 99 to 100 percent pure bone marrow cells expressing the CD34 phenotypic marker were obtained. These cells were devoid of mature myeloid or T cell surface and intracellular markers as analyzed by immunohistochemical staining and flow cytometry. HIV-1 particles were detected by supernatant reverse transcriptase activity and transmission electron microscopy 40 to 60 days after infection. Viral particles were predominantly observed assembling and accumulating from within intracellular membranes, while phenotypically the cells were observed to have differentiated into CD4+ monocytes. These studies have important implications in understanding the pathogenesis of HIV-1 as well as the possible cause of certain of the observed hematologic abnormalities in HIV-1 infection. They also indicate that the bone marrow may serve as a potentially important reservoir of HIV-1 in the body.


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