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Human immunodeficiency virus Env-independent infection of human CD4(-) cells.


ABSTRACT: CD4(-) epithelial cells covering mucosal surfaces serve as the primary barrier to prevent human immunodeficiency virus type 1 (HIV-1) infection. We used HIV-1 vectors carrying the enhanced green fluorescent protein gene as a reporter gene to demonstrate that HIV-1 can infect some CD4(-) human epithelial cell lines with low but significant efficiencies. Importantly, HIV-1 infection of these cell lines is independent of HIV-1 envelope proteins. The Env-independent infection of CD4(-) cells by HIV-1 suggests an alternative pathway for HIV-1 transmission. Even on virions bearing Env, a neutralizing antibody directed against gp120 is incapable of neutralizing the infection of these cells, thus raising potential implications for HIV-1 vaccine development.

SUBMITTER: Pang S 

PROVIDER: S-EPMC113179 | biostudies-literature | 2000 Dec

REPOSITORIES: biostudies-literature

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Human immunodeficiency virus Env-independent infection of human CD4(-) cells.

Pang S S   Yu D D   An D S DS   Baldwin G C GC   Xie Y Y   Poon B B   Chow Y H YH   Park N H NH   Chen I S IS  

Journal of virology 20001201 23


CD4(-) epithelial cells covering mucosal surfaces serve as the primary barrier to prevent human immunodeficiency virus type 1 (HIV-1) infection. We used HIV-1 vectors carrying the enhanced green fluorescent protein gene as a reporter gene to demonstrate that HIV-1 can infect some CD4(-) human epithelial cell lines with low but significant efficiencies. Importantly, HIV-1 infection of these cell lines is independent of HIV-1 envelope proteins. The Env-independent infection of CD4(-) cells by HIV-  ...[more]

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