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In vitro characterization of HIV type 1 biological clones from asymptomatic and symptomatic pediatric patients

Forte, Serene Elizabeth
Sullivan, John L.
Somasundaran, Mohan
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Serene Forte
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Journal Article
Publication Date
1996-11-20
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Abstract

To investigate the mechanisms of HIV-1 cytopathogenicity, functional biological HIV-1 clones were isolated from two infected children with high viral loads in vivo. Clone HC4 was isolated from a symptomatic child and clone GC6 8-4 was isolated from an asymptomatic child. These clones were characterized for their ability to induce syncytia, and to replicate and induce single-cell death in peripheral blood-derived normal CD4 T cell cultures containing anti-CD4 antibody. Despite similar viral loads as determined by p24 antigen production or viral RNA expression, GC6 8-4 was noncytopathogenic and HC4 was cytopathogenic. Since we had demonstrated that mitochondrial dysfunction correlated with HIV-1-induced cell death, we determined whether the cytopathogenic HC4 clone decreased mitochondrial viability using a mitochondrial-specific dye, rhodamine-123. Following infection, mitochondrial viability decreased in cells infected with HC4 by day 4 and continued to decline through day 7 when compared to uninfected cells. By day 7 postinfection, greater than 80% of the cells in culture were dead. Similar analyses on CD4 T cells infected with the noncytopathogenic GC6 8-4 demonstrated that mitochondria remained functionally viable and > 90% of the cells excluded trypan blue. These studies describe a cell culture system to study single-cell death in the absence of syncytia and secondary infection. Results with two patient-derived HIV-1 biological clones suggest that loss of mitochondrial viability may play a role in HIV-1-induced cytopathogenicity.

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AIDS Res Hum Retroviruses. 1996 Nov 20;12(17):1585-93. doi:10.1089/aid.1996.12.1585. Link to article on publisher's website

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10.1089/aid.1996.12.1585
PubMed ID
8947293
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This is a copy of an article published in AIDS Research and Human Retroviruses © 1996 Mary Ann Liebert, Inc.; AIDS Research and Human Retroviruses is available online at: http://www.liebertonline.com.
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