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The impaired number of circulating granulocyte/macrophage progenitors (CFU-GM) in human immunodeficiency virus-type 1 infected subjects correlates with an active HIV-1 replication

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Summary

In this paper we investigated the role played by human immuno-deficiency virus type 1 (HIV-1) in the pathogenesis of peripheral blood (PB) cytopenias of AIDS patients. The in vitro growth of PB granulocyte/macrophage progenitors (CFU-GM) was investigated in 45 HIV-1 seropositive (+) individuals at different stages of the disease. The number of circulating CFU-GM was significantly (p<0.01) lower in AIDS patients (stages WR V-VI) than in HIV-1(+) asymptomatic individuals (stages WR I-II). Moreover, the presence of gag p 24 in the plasma and/or viral isolation from PB mononuclear cells of HIV-1(+) individuals was inversely correlated (p<0.01) with the number of circulating CFU-GM, irrespectively with the stage of the disease. Viral isolates obtained from one asymptomatic and four symptomatic HIV-1(+) individuals were tested on the in vitro growth of normal hematopoietic progenitor (CD34+) cells, purified from PB of healthy donors. All the different viral isolates showed a dose-dependent inhibition of CD34+ cells, in the absence of either productive or latent infection. This suppressive effect was completely reversed by prein-cubating the different viral isolates with a polyclonal anti-gp 120 antibody before adding to normal CD34+ cells. These findings suggest a direct involvement of active viral replication products in the progressive impairment of hematopoiesis, characteristic of HIV-1(+) individuals in spite of the lack of a productive or latent infection of CD34+ hematopoietic progenitors.

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Authors and Affiliations

  1. Institute of Microbiology, University of Bologna, Bologna

    M. C. Re, G. Zauli, G. Furlini, P. Monari, E. Ramazzotti & M. La Placa

  2. Infectious Diseases Department, “Santa Maria delle Croci” Hospital, Ravenna, Italy

    S. Ranieri

Authors
  1. M. C. Re
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  2. G. Zauli
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  3. G. Furlini
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  4. S. Ranieri
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  5. P. Monari
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  6. E. Ramazzotti
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  7. M. La Placa
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Re, M.C., Zauli, G., Furlini, G. et al. The impaired number of circulating granulocyte/macrophage progenitors (CFU-GM) in human immunodeficiency virus-type 1 infected subjects correlates with an active HIV-1 replication. Archives of Virology 129, 53–64 (1993). https://doi.org/10.1007/BF01316884

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  • DOI: https://doi.org/10.1007/BF01316884

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