Natural killer cells are persistently infected and resistant to direct killing by HIV-1.

Abstract:

:We have reported the presence of a CD4+ subpopulation of Natural Killer cells (NK) in humans. These cells also express HIV coreceptors CCR5 or CXCR4 and are infectable by HIV-1. Infection is productive and persistent in vitro and in vivo. Infected people under therapy have evidence of viral DNA in their NK pool. In vitro experiments show that the NK compartment is important for virus propagation, since HIV-1 growth is significantly reduced in PBMC depleted of NK cells. This reduction was observed for both R5 and X4 molecular clones of HIV-1. In addition, evidence is presented demonstrating that infected NK cells are killed less efficiently by the virus as compared to T cells. This is reminiscent of macrophage infection, where the virus-infected cells survive for long periods of time. Therefore, few infected NK cells may contribute significantly to the infectious virus produced in vitro. These results further underscore the importance of NK infection for understanding pathogenic mechanisms leading to AIDS, as well as the various reservoirs and sanctuaries for HIV upon antiretroviral treatment.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Valentin A,Pavlakis GN

subject

Has Abstract

pub_date

2003-05-01 00:00:00

pages

2071-5

issue

3A

eissn

0250-7005

issn

1791-7530

journal_volume

23

pub_type

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