Integrin α4β7 Expression Increases HIV Susceptibility in Activated Cervical CD4+ T Cells by an HIV Attachment-Independent Mechanism.
2015
Background
CD4+ T cells, the principal target in acute SIV and HIV infection, are crucial for the establishment and dissemination of HIV infection in mucosal tissues. Studies indicate that α4β7 CD4+ T cells are preferentially infected by HIV in vitro and during acute SIV infection. The integrin α4β7 is thought to promote HIV capture by target cells; however, the role of integrin α4β7 in HIV transmission remains controversial. In this study, we characterized immune phenotypes of human cervical T cells and examined HIV preference in integrin α4β7+ CD4+ T cells. In vitro all-trans retinoic acid differentiated peripheral CD4+ T cells (at-RA differentiated cells) were included as a comparison.
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