Preliminary in vitro growth cycle and transmission studies of HIV-1 in an autologous primary cell assay of blood-derived macrophages and peripheral blood mononuclear cells

Virology
W P TsaiP L Nara

Abstract

Recent interest focused on the dynamics of HIV-1 replication in primary monocytes/macrophages and T-lymphocytes of the immune system, as well as the standardization of virological and immunological in vitro assays with primary isolates, provided the impetus for these studies. These types of studies have never been performed as they would occur in vivo, i.e., where the envelope of the virus and cell membranes of the two cell types of the same host origin. Therefore, the biological and physicochemical properties of an uncloned, primary dual-tropic isolate HIV-1ADA during the initial lag, log, and stationary phases of viral replication were studied in an autologous donor cell assay in peripheral blood mononuclear cells (PBMC) and blood monocyte-derived macrophages (MDM). Similar total numbers (10(9) virus particles/ml) were produced by both cell types during the stationary period. On a per cell per day basis, during peak stationary periods, 0.92 x 10(3) virions/day for MDMs and 5.31 x 10(3) virions/day for PBMCs were produced. Interestingly, virus replicating from MDMs during the log-growth phase demonstrated the greatest infectious fraction which was 3 logs greater than virus replicating in PBMCs. Despite constant virus particle ...Continue Reading

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