Solid Organ Transplantation and the Use of Raltegravir in HIV-Infected Patients: An Observational Study of Pharmacokinetics, Safety, Tolerability and Efficacy

Pre-transplant: Patients on stable antiretroviral regimens who undergo evaluation for transplantation and are subsequently placed on the transplant waiting list will be considered for inclusion in the study. The details of the cART for each patient will remain the sole purview of the patient and the patient's HIV care provider. To be considered for solid organ transplantation, in addition to routine transplant listing criteria, the patient must fulfill the following criteria: non-pregnant adult patient with CD4 count >200/μL; no concurrent active AIDS-defining infections or malignancy; at least 24 months of well controlled HIV viremia, defined as <50 copies for the majority of the time. After all screening procedures have been completed to ensure eligibility, a pre-transplant pharmacokinetic study will be done as described below. Using specimens obtained during 7 time points, patient-specific Cmax, Cmin and AUC determinations will be made using standard calculation approaches. The PK data will also include samples drawn on dialysis days for patients with End-stage renal failure:- pre-dialysis, arterial and venous concentrations (Cin and Cout) at the beginning of dialysis, and post dialysis levels (to determine individual hemodialysis extraction ratios). Additional data to be collected include a Quality of Life questionnaire, SF-36, and a PHQ-9 depression screen which will be administered as a baseline test done at enrollment. Patients will be asked to have a dual-emission X-ray absorptiometry (DEXA) scan prior to transplant (unless this has been completed within two years of enrollment). Peri-transplant Assessments: In addition to the standard of care laboratory and imaging procedures that are done around the time of organ transplantation, the following research samples will be collected: Pre-transplant - RAL concentrations In addition, the following information will be recorded from the subject's medical record: full HIV and infective history and test results including CD4 count, and percentage, HIV viral load, electrocardiography (to assess QTc interval), CMV-IgG/IgM, Hepatitis B, C, D screens +/- viral loads if not already determined. Post-transplant inpatient hospitalization RAL concentrations as well as HIV viral load and CD4/CD8 lymphocyte populations. In addition, the following information will be recorded from the subject's medical record: test results including EKG (to assess QTc interval). Post-transplant: RAL concentrations will be collected at Months 1 and 3 only. In addition to the routine post-transplant care, the following information will be collected from the subject's medical records at study months 1, 3, 6, 9, 12, 24 post transplant: CD4 count and %, HIV viral load (+/- genotype and integrase mutation analysis if viral rebound occurs), Vitamin D, Basic Metabolic Panel (to calculate ClCr), quantitative urinary creatinine and protein excretion. Patient side-effect card will be ascertained by directed questioning from the study coordinator at each visit. Repeat DEXA scan will be done at the 24 months post-transplant visit. Quality of Life assessment and depression screening tools will be administered at the 6 and 24 month marks.