IMPAACT P1092: Steady State PK in Malnourished HIV Infected Children

Overview

Children living with HIV from sub-Saharan Africa often present with severe malnutrition. In severe malnutrition, metabolic and/or gut structural derangement may lead to inadequate antiretroviral (ARV) absorption and/or erratic drug levels. The greater surface area to weight ratio in severely malnourished children could also place them at higher risk of under dosing compared to children with mild to moderate malnutrition. However, limited data are available on the pharmacokinetics of ARVs in severely malnourished children. This study addressed this critical gap in knowledge by evaluating the PK of zidovudine (ZDV), lamivudine (3TC), and lopinavir/ritonavir (LPV/r) in severely malnourished children living with HIV, compared to children with normal nutrition to mild malnutrition living with HIV.

P1092 was a prospective, non-randomized Phase IV open label study of antiretroviral drugs zidovudine (ZDV), lamivudine (3TC), and ritonavir boosted lopinavir (LPV/r) in children living with HIV aged 6 to less than 36 months grouped by nutritional status. The study's primary objectives were to characterize the pharmacokinetics (PK), safety, and tolerability of antiretroviral (ARV) regimens in severely acute malnourished (SAM) children following the initiation of nutritional rehabilitation and compare results to mildly malnourished or normally nourished children in order to determine if current recommended doses are optimal in severely malnourished children. Two cohorts of children were enrolled based on nutritional status at screening: severely acute malnourished children and children with mild malnutrition or normal nutrition (non-SAM cohort). SAM participants were recruited from nutritional rehabilitation clinics while non-SAM participants were enrolled from HIV treatment centers. SAM participants were required to complete a 10 to 18 day nutritional rehabilitation program before entering the study. A World Health Organization (WHO, 2013) approach to management of SAM was used. All participants were to receive an antiretroviral regimen of ZDV+3TC+LPV/r. ARVs were dosed based on WHO weight band dosing and were to be administered twice per day in a pediatric liquid formulation. ZDV was allowed to be replaced with abacavir at the discretion of the site investigator/clinician in cases of grade 3 or higher hematologic toxicity on a ZDV-inclusive regimen or ZDV intolerance. Participants were followed for 48 weeks.