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Characterization of a Human Stromal Cell Line Supporting Hematopoietic ProgenitorCell Proliferation: Effect of HIV Expression

机译:支持造血祖细胞增殖的人基质细胞系的表征:HIV表达的影响

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Our objective was to determine the role that bone-marrow derived stromal cellshave on human hematopolesis in HIV infection. particular, we dissected the heterogenous bone marrow microenvironment to study the effect HIV expression might have on the cell population capable of producing the cytokines which will support human CD34+ cell differentiation. A stromal cell line, Lof(11-10), was established from human bone marrow by transfecting a plasmid containing the SV40 large T-antigen and isolating foci exhibiting a transformed phenotype. However, because the Lof(11-10) cells are not infectible by HIV, molecular clones of HIV were introduced into these cells by transfection. There was no qualitative difference in the levels of cytokine production between HIV-expressing and control Lof(11-10) cells. Our data suggest that HIV infection of the cytokine-producing cells within the bone marrow microenvironment, as represented by The Lof(11-10) cell line, results in both normal cytokine production and hematopoiesis in spite of HIV expression. This report adds to the evidence against stromal cells being a significant target of HIV and establishes a system for comparison with more relevant models.

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