• Home >
  • Publications >
  • CD36-specific antibodies block release of HIV-1 from infected primary macrophages and its transmission to T cells

CD36-specific antibodies block release of HIV-1 from infected primary macrophages and its transmission to T cells

18 Nov 2013Journal of Experimental Medicine

DOI : 10.1084/jem.20130566

Authors

Stefano Berre, Raphaël Gaudin, Bruna Cunha de Alencar, Marion Desdouits, Mélanie Chabaud, Nadia Naffakh, Marc Rabaza-Gairi, François-Xavier Gobert, Mabel Jouve, Philippe Benaroch

Abstract

HIV-1–infected macrophages likely represent viral reservoirs, as they accumulate newly formed virions in internal virus-containing compartments (VCCs). However, the nature and biogenesis of VCCs remain poorly defined. We show that upon HIV-1 infection of primary human macrophages, Gag is recruited to preexisting compartments containing the scavenger receptor CD36, which then become VCCs. Silencing of CD36 in HIV-1–infected macrophages decreases the amount of virions released. Strikingly, soluble anti-CD36 antibodies, but not the natural ligands of CD36, inhibit release of virions from HIV-1–infected macrophages and the transmission of virus to CD4+ T cells. The effect of the antibodies is potent, rapid, and induces the retention of virions within VCCs. Ectopic expression of CD36 in HeLa cells renders them susceptible to the inhibitory effect of the anti-CD36 mAb upon HIV-1 infection. We show that the anti-CD36 mAb inhibits HIV-1 release by clustering newly formed virions at their site of budding, and that signaling via CD36 is not required. Thus, HIV-1 reservoirs in macrophages may be tackled therapeutically using anti-CD36 antibodies to prevent viral dissemination.

Members

FRANCOIS XAVIER GOBERT

Ingénieur d'études

PHILIPPE BENAROCH

Directeur de recherche CNRS