title: Evidence for a human immunodeficiency virus type 1-mediated suppression of uninfected hematopoietic (CD34+) cells in AIDS patients.
abstract: Hematopoietic progenitor (CD34+) cells were purified from the bone marrow of 6 human immunodeficiency virus (HIV) type 1-seropositive cytopenic patients and 10 healthy donors. HIV-1-seropositive patients showed a reduced number of granulocyte/macrophage, erythroid, and megakaryocyte progenitors and also a progressive and significant decline of numbers of CD34+ cells in liquid culture, which did not result from a productive or latent HIV-1 infection of CD34+ cells. However, all HIV-1-seropositive patients showed signs of active viral replication at the bone marrow level. Moreover, virus isolates from 3 HIV-1-seropositive patients showed a dose-dependent inhibition on growth of normal CD34+ cells. This suppressive activity was almost completely reversed by incubating the virus isolates with an anti-gp120 polyclonal antibody before adding to normal CD34+ cells.
authors.affiliation: Institutes of Microbiology and Hematology (L and A Seragnoli), University of Bologna, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Zauli
authors.forename: M C
authors.initials: MC
authors.lastname: Re
authors.forename: G
authors.initials: G
authors.lastname: Visani
authors.forename: G
authors.initials: G
authors.lastname: Furlini
authors.forename: P
authors.initials: P
authors.lastname: Mazza
authors.forename: M
authors.initials: M
authors.lastname: Vignoli
authors.forename: M
authors.initials: M
authors.lastname: La Placa
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000276:immunology*; D000328:Adult; D015703:Antigens, CD / Q000032:analysis*; D018952:Antigens, CD34; D001853:Bone Marrow / Q000276:immunology / Q000382:microbiology; D015704:CD4 Antigens / Q000032:analysis; D016516:CD4-CD8 Ratio; D016827:CD8 Antigens / Q000032:analysis; D002478:Cells, Cultured; D005260:Female; D006679:HIV Seropositivity / Q000276:immunology*; D015497:HIV-1 / Q000302:isolation & purification; D006412:Hematopoietic Stem Cells / Q000276:immunology*; D006801:Humans; D008297:Male; D014779:Virus Replication
chemical_list: D015703:Antigens, CD; D018952:Antigens, CD34; D015704:CD4 Antigens; D016827:CD8 Antigens