%0 Journal Article %A Voisset, Cécile %A de Beeck, Anne Op %A Horellou, Pauline %A Dreux, Marlène %A Gustot, Thierry %A Duverlie, Gilles %A Cosset, François-Loic %A Vu-Dac, Ngoc %A Dubuisson, Jean %T High-density lipoproteins reduce the neutralizing effect of hepatitis C virus (HCV)-infected patient antibodies by promoting HCV entry %D 2006 %J Journal of General Virology, %V 87 %N 9 %P 2577-2581 %@ 1465-2099 %R https://doi.org/10.1099/vir.0.81932-0 %I Microbiology Society, %X The neutralizing activity of anti-hepatitis C virus (HCV) antibodies is attenuated by a factor present in human sera, which has been proposed to be high-density lipoproteins (HDLs). HDLs have also been shown to facilitate the entry of HCV pseudoparticles (HCVpp) into target cells. Here, the aim of the study was to determine whether HDL-mediated facilitation of HCVpp and infectious HCV (HCVcc) entry and attenuation of neutralization are two related phenomena. The data indicated that HDLs attenuate neutralization at a constant rate. In addition, as for HDL-mediated facilitation of HCVpp entry, attenuation of neutralization depended on the expression of the scavenger receptor BI (SR-BI) and its selective lipid-uptake function. Finally, kinetic experiments showed that HDL-mediated facilitation of HCVpp entry is more rapid than virus neutralization. Altogether, these observations indicate that HCV is exploiting the physiological activity of SR-BI for promoting its entry into target cells, which consequently also protects the virus against neutralizing antibodies. %U https://www.microbiologyresearch.org/content/journal/jgv/10.1099/vir.0.81932-0