Antagonistes du CCR5Â : apport d'une nouvelle classe d'antirétroviraux dans la prise en charge de l'infection par le VIH

Maraviroc, the first approved CCR5-antagonist, is indicated for treatment-experienced adult patients infected with mainly detectable CCR5-tropic HIV-1, which predominates throughout infection. The antiretroviral effectiveness of maraviroc in combination with an optimized ARV therapy has been reported in clinical trials including previously treated patients. The significantly greater increase in CD4 cell counts in patients treated with maraviroc could result from a specific action as well as a better capacity to diffuse in deep compartments. According to available reports, a tropic switch from R5 to X4 induced by maraviroc treatment is not expected. These observations, combined with the predominance of R5-virus throughout the disease, support the early use of maraviroc as soon as patients fail their therapy. Provided genotypic tests assessing R5 tropism are available when the plasma viral load is not detectable, the good safety profile of maraviroc, which includes lipid parameters, could justify its use in patients with successful regimen in order to reduce the subsequent risk of major adverse events.