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- W2076647527 abstract "In the Heterosexual AIDS Transmission Study (HATS), the frequency of high-risk sexual activity and viral load in the seropositive partner were shown to correlate with HIV-1 transmission. However, these parameters could not account for the status of some exposed, seronegative (ESN) individuals who remained uninfected despite years of exposure. To test the hypothesis that antiviral immune responses are a correlate of nontransmission in this cohort, we developed two sensitive methods for assessing HIV-1-specific humoral and cell-mediated responses. To quantify T cell responses, autologous mature dendritic cells (DCs) were used as antigen-presenting cells to elicit HIV-1-specific IFN-gamma production by ELISPOT. Antibody responses to HIV-1 gp120 were assessed by combination immunoprecipitation-Western blot (IP-WB). Previous studies of this cohort, using limiting dilution analysis, did not reveal HIV-1-specific cytotoxic T lymphocyte activity. However, when autologous DCs were used to present HIV-1 antigens, T cells from three of eight ESN women (38%) responded by producing IFN-gamma. T cells from three of four seropositive partners responded to HIV-1 antigens, whereas five negative controls did not. The use of DCs as antigen-presenting cells increased sensitivity by 2- to 30-fold relative to standard ELISPOT. Using IP-WB, low levels of gp120-reactive antibodies were detected in plasma from 1 of 14 ESN women. These results support the hypothesis that HIV-1-specific T cell responses play a role in immune surveillance in this cohort of North American serodiscordant couples. This report also demonstrates the ability of dendritic cells to reveal T cell responses that might be overlooked by other methods." @default.
- W2076647527 created "2016-06-24" @default.
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- W2076647527 date "2002-07-20" @default.
- W2076647527 modified "2023-10-06" @default.
- W2076647527 title "Dendritic Cell Amplification of HIV Type 1-Specific CD8<sup>+</sup>T Cell Responses in Exposed, Seronegative Heterosexual Women" @default.
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- W2076647527 doi "https://doi.org/10.1089/08892220260139558" @default.
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