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Title: In vitro susceptibility of Thai seronegative donor CD8+ T lymphocytes to human immunodeficiency virus-1 (HIV-1) infection
Authors: Ronnarit Haponsaph
Janice M. Darden
Somsak Chantakulkij
Nongluck Sannoi
Mark S. de Souza
Arthur E. Brown
Deborah L. Birx
Victoria R. Polonis
Kovit Pattanapanyasat
Mahidol University
Armed Forces Research Institute of Medical Sciences, Thailand
Walter Reed Army Institute of Research
Keywords: Immunology and Microbiology;Medicine
Issue Date: 1-Mar-2004
Citation: Asian Pacific Journal of Allergy and Immunology. Vol.22, No.1 (2004), 39-48
Abstract: To determine whether CD8+ T lymphocytes from Thai donor cells are susceptible to HIV-1 infection, undepleted peripheral blood mono-nuclear cells (PBMC) and CD8-enriched PBMC were infected with HIV-1 Thai subtype B and CRF01Æ (E) primary isolates. Virus kinetics in HIV-1 infection of CD4+ and CD8+ T lymphocytes peaked at day 7 or 10 post infection (pi); the TCID50 used for cell infection was proportional to the level of p24 production in the cultures. We also found that the level of p24 antigen in the supernatants of infected undepleted PBMC was significantly higher than that of infected CD8-enriched PBMC. Interestingly, both single positive T lymphocytes (CD4+ and CD8+ T lymphocytes) as well as double positive CD4+/CD8+ T lymphocytes were infected with HIV-1. The double positive T lymphocytes in PBMC were found only in the presence of both CD4+ and CD8+ T lymphocytes. The majority of p24+/CD4-/CD8- T lymphocytes were HIV-1 infected CD4 down-modulated PBMC. This report provides direct evidence that single positive CD8+ T lymphocytes and double positive CD4+/D8+ T lymphocytes from Thai donors can be infected with HIV-1 subtypes B and E in vitro.
ISSN: 0125877X
Appears in Collections:Scopus 2001-2005

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