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- W1900392249 abstract "The vaginal and cervical epithelia provide an initial barrier to sexually acquired HIV-1 infection in women. To study the interactions between HIV-1-infected cells or cell-free HIV-1 and the reproductive epithelium, the transmission of HIV-1 by infected cells or cell-free virus across human cervical epithelial cells was examined using a Transwell culture system. Cell-associated HIV-1 was transmitted more efficiently than cell-free virus, and monocyte-associated virus was transmitted most efficiently. Abs to ICAM-1 added to the apical side of the epithelium blocked cell-mediated transepithelial HIV-1 transmission in vitro. When used in a previously described model of vaginal HIV-1 transmission in human PBL-SCID mice, anti-murine ICAM-1 Abs (0.4 microg/10 microl) also blocked vaginal transmission of cell-associated HIV-1 in vivo. To evaluate a candidate delivery system for the use of this Ab as an anti-HIV-1 microbicide, anti-ICAM single-chain variable fragment Abs secreted by transformed lactobacilli were evaluated for their protective efficacy in the Transwell model. Like the intact Ab and Fab derived from it, the single-chain variable fragment at a concentration of 6.7 microg/100 microl was able to reduce HIV-1 transmission by 70 +/- 5%. These data support the potential efficacy of an anti-ICAM Ab delivered by lactobacilli for use as an anti-HIV-1 microbicide." @default.
- W1900392249 created "2016-06-24" @default.
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- W1900392249 date "2006-05-01" @default.
- W1900392249 modified "2023-09-26" @default.
- W1900392249 title "Lactobacilli-Expressed Single-Chain Variable Fragment (scFv) Specific for Intercellular Adhesion Molecule 1 (ICAM-1) Blocks Cell-Associated HIV-1 Transmission across a Cervical Epithelial Monolayer" @default.
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- W1900392249 doi "https://doi.org/10.4049/jimmunol.176.9.5627" @default.
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