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Hematopoiesis in asymptomatic cats infected with feline immunodeficiency virus.

Abstract：

:Anemia and neutropenia often develop in cats that are infected with the feline immunodeficiency virus (FIV), a lentivirus biologically similar to the human immunodeficiency virus (HIV). To assess the role of FIV in the pathogenesis of these abnormalities, marrow culture studies were performed on nine asymptomatic, hematologically normal cats that were chronically infected with FIV. In these experiments, the frequencies of granulocyte/macrophage progenitors (CFU-GM) and early and late erythroid progenitors (CFU-E and BFU-E, respectively) were equivalent to progenitor frequencies in simultaneously studied uninfected control cats. Asymptomatic FIV infection was not associated with a change in the cell-cycle kinetics of CFU-E, BFU-E, or CFU-GM, nor was there an alteration in the dose-response of BFU-E or CFU-GM to hematopoietic growth factors present in fibroblast-derived conditioned medium. Sera from FIV-infected cats supported progenitor growth in vitro as well as normal cat sera. Furthermore, there was no evidence that these sera contained complement-fixing antibodies that recognized hematopoietic progenitors. Therefore, these data show that the in vitro behavior of hematopoietic progenitors is not affected by FIV infection alone, and they are in agreement with recent evidence that human progenitors are not a major target of HIV infection. It is likely that factors associated with progressive immunodeficiency, opportunistic infections, nutritional deficiencies, or malignancies play significant roles in the cytopenias that develop during the symptomatic disease induced by FIV, and by analogy, HIV. Prospective marrow culture studies of FIV-infected cats that develop hematologic abnormalities should provide a valuable animal model of acquired immunodeficiency syndrome-associated hematologic disorders.

journal_name

Blood

journal_title

Blood

authors

Linenberger ML,Shelton GH,Persik MT,Abkowitz JL

subject

Has Abstract

pub_date

1991-10-15 00:00:00

pages

1963-8

issue

8

eissn

0006-4971

issn

1528-0020

journal_volume

78

pub_type

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