title: Inhibitory effects of HIV-1-infected stromal cell layers on the production of myeloid progenitor cells in human long-term bone marrow cultures.
abstract: This report presents the results of studies using long-term bone marrow cultures (LTBMC) of human bone marrow cells to investigate the effect of HIV-1 on in vitro hematopoiesis. Confluent stromal cell layers established from human bone marrow cells were irradiated to eliminate residual hematopoietic progenitor cells and exposed to HIV-1ADA or to HIV-1IIIB, monocytotropic and lymphocytotropic strains of HIV-1, respectively. A productive infection did not develop in cultures exposed to HIV-1IIIB but did for cultures exposed to HIV-1ADA as there was a progressive increase in HIV-1 p24 antigen. Stromal cell layers infected with HIV-1ADA were also cocultured with autologous CD34+ bone marrow cells. Four days, 1, 2, and 3 weeks later, the number of colony-forming units granulocyte/macrophage (CFU-GM) in non- and HIV-infected LTBMC was determined. The number of CFU-GM increased during the first week in both non- and HIV-infected LTBMC. One week after the coculture of CD34+ cells with stromal cell layers infected with HIV-1ADA, the number of CFU-GM in six out of eight experiments was reduced compared to noninfected control LTBMC. In those six experiments, the number of CFU-GM was 53 +/- 6% standard error of the mean (SEM) of the number in noninfected LTBMC. A reduced number of CFU-GM was observed in the nonadherent fraction of HIV-infected LTBMC for at least 2 weeks. These results demonstrate that some cells in the stromal cell layers of LTBMC were targets for HIV-1 and that HIV-infected stromal cell layers suppressed or delayed the production of CFU-GM.
authors.affiliation: Department of Hematology, Walter Reed Army Institute of Research, Washington, DC.
authors.forename: G N
authors.initials: GN
authors.lastname: Schwartz
authors.forename: S W
authors.initials: SW
authors.lastname: Kessler
authors.forename: S W
authors.initials: SW
authors.lastname: Rothwell
authors.forename: L M
authors.initials: LM
authors.lastname: Burrell
authors.forename: T J
authors.initials: TJ
authors.lastname: Reid
authors.forename: M S
authors.initials: MS
authors.lastname: Meltzer
authors.forename: D G
authors.initials: DG
authors.lastname: Wright
mesh_terms: D015703:Antigens, CD / Q000032:analysis; D018952:Antigens, CD34; D001854:Bone Marrow Cells; D002478:Cells, Cultured; D003114:Colony-Forming Units Assay; D006133:Growth Substances / Q000494:pharmacology; D015658:HIV Infections / Q000503:physiopathology*; D006410:Hematopoiesis; D006412:Hematopoietic Stem Cells / Q000166:cytology*; D006801:Humans; D066298:In Vitro Techniques; D013997:Time Factors
chemical_list: D015703:Antigens, CD; D018952:Antigens, CD34; D006133:Growth Substances