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Glidden, David V; Mulligan, Kathleen; McMahan, Vanessa; Anderson, Peter L; Guanira, Juan; Chariyalertsak, Suwat; Buchbinder, Susan P; Bekker, Linda-Gail; Schechter, Mauro; Grinsztejn, Beatriz; Grant, Robert M
Clinical infectious diseases, 07/2018, Volume: 67, Issue: 3Journal Article
Abstract Background Antiretroviral drugs have been associated with changes in lipids, fat mass and dat distribution. Tenofovir disoproxil fumarate (TDF) has been shown to have a more favorable metabolic profile than other drugs in its class. However, the metabolic effects of TDF in preexposure prophylaxis (PrEP) are unknown. Methods We evaluated the effects of TDF/emtricitabine (FTC) on lipids and body composition in a blinded, placebo-controlled PrEP trial. Participants enrolled in a metabolic subcohort (N = 251, TDF/FTC; N = 247, placebo) consented to fasting lipid panels, dual-energy X-ray absorptiometry scans for body composition, and pharmacologic testing of drug metabolites at baseline and every 24 weeks thereafter. Results Lean body mass was stable and unaffected by TDF/FTC. Body weight increased in both groups but was lower on TDF/FTC through week 72. This difference was explained by lower fat accumulation on TDF/FTC. The net median percent difference (standard error, P value) for TDF/FTC vs placebo at week 24 was −0.8% (0.4%, P = .02), +0.3% (0.4%, P = .46), and −3.8% (1.4%, P = .009) for total, lean, and fat mass, respectively. There was no apparent differential regional fat accumulation on TDF/FTC. Decreases in cholesterol, but not triglycerides, were seen in TDF/FTC participants, with detectable drug levels compared to placebo. Conclusions TDF/FTC for PrEP showed cholesterol reductions and appeared to transiently suppress the accumulation of weight and body fat compared to placebo. There was no evidence of altered fat distribution or lipodystrophy during daily oral TDF/FTC PrEP. Clinical Trials Registration NCT00458393. Preexposure prophylaxis (PrEP) with tenofovir disoproxil fumarate /emtricitabine (TDF/FTC) leads to small losses of body fat but does not appear to affect fat distribution or lean body mass. It does modestly lower lipid levels as observed in HIV treatment.
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