Plasma and mucosal fluid from HIV type 1-infected patients but not from HIV type 1-exposed uninfected subjects prevent HIV type 1-exposed DC from infecting other target cells.
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Date
2007-01-23Author
Söderlund, J
Hirbod, T
Smed-Sörensen, A
Johansson, U
Kimani, J
Plummer, F
Spetz, AL
Andersson, J
Kaul, R
Broliden, K.
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
Highly exposed persistently seronegative (HEPS) individuals have previously been shown to mount HIV-1-specific humoral and cellular immune responses in the mucosa, despite their uninfected status. It is thus possible that HEPS individuals are protected from HIV-1 infection at the mucosal level. Recent work supports the hypothesis that dendritic cells are involved in the establishment of a mucosal HIV-1 infection as well as the dissemination to other target cells. However, no previous study has investigated if samples collected from HEPS individuals have the capacity to prevent HIV-1 infection in the presence of dendritic cells in vitro. We therefore established an assay that measures HIV-1 neutralization in cocultures of HIV-1-exposed dendritic cells (DC) and PBMC. Plasma and cervicovaginal lavage (CVL) samples from HIV-1-infected patients and HEPS individuals, enrolled in a well-characterized sex worker cohort in Kenya, were evaluated. Most plasma and CVL samples of HIV-1-infected patients neutralized HIV-1 in the DC/PBMC cocultures. Neither plasma nor CVL samples of most HEPS individuals had this capacity. However, they readily neutralized HIV-1 infection of PBMC alone. This may suggest that protection against HIV-1 infection in HEPS individuals occurs prior to interaction between HIV-1-exposed DC and other target cells.
URI
http://www.ncbi.nlm.nih.gov/pubmed/17263639http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/60445
Citation
AIDS Res Hum Retroviruses. 2007 Jan;23(1):101-6.Publisher
University of Nairobi Department of Medical Microbiology
Collections
- Faculty of Health Sciences (FHS) [10377]