Raltegravir in Patients With End Stage Liver Disease and in Transplant Recipients

HIV infected patients with stable plasma HIV-RNA below 50 copies per mL and severe liver dysfunction will be switched from their antiretroviral regimen to a combination of raltegravir (one 400 mg pill twice daily) and two fully active molecules among nucleosi(ti)de analogs and enfuvirtide for a first period of at least 3 months and a second period of at least 3 months after liver transplantation, if need be, when a steady state of the anticalcineurin will be reached. Pharmacokinetic parameters of raltegravir will be calculated during severe liver dysfunction period and after liver transplantation. Pharmacokinetic parameters of cyclosporine (or tacrolimus if contra indication to cyclosporine) will be compared when administrated alone or combined with raltegravir. Patients will be followed up according to standard of care. This study will be divided in two distinct periods (1 and 2) lasting 3 months each. Period 1 will start from the inclusion in the study and will generally include the switch to raltegravir. Period 2 will start from liver transplantation.