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[摘要]：Individuals infected with HIV-1 progress to AIDS at different rates. Rapid progressors develop AIDS within 2-5 years of initial infection, compared with approximately 10 years in typical progressors. Progression to AIDS is associated with impaired humoral and cellular immunity. In this issue of the JCI, Titanji and colleagues report that activated memory B (mB(Act)) cells are depleted in SW-infected macaques defined as rapid progregsors. Depletion was mediated by programmed death-1 (PD-1) and resulted in reduction of antibody titers specific for SW and bacterial antigens. Interestingly, blockade of PD-1 in infected animals protected B cells from apoptosis and increased levels of Sly-specific antibodies in blood. These findings pave the way for a new therapeutic strategy aimed at improving humoral immunity in HIV-1 infection. |
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