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- W2982203495 abstract "Abstract Background In the DISCOVER PrEP trial, emtricitabine/tenofovir alafenamide (F/TAF) was noninferior to emtricitabine/tenofovir disoproxil fumarate (F/TDF) for HIV prevention. Here, we report on the renal outcomes of F/TAF and F/TDF among all DISCOVER participants and in those on baseline F/TDF PrEP who were randomized to F/TAF. Methods In total, 5387 men who have sex with men (MSM) and transgender women (TGW) at risk for HIV were randomized 1:1 to receive blinded F/TDF or F/TAF taken once daily (full cohort). Of these, 905 were on F/TDF PrEP at enrollment; of whom, 465 were randomized to F/TAF. Renal function and safety assessments included urinalysis (UA), estimated glomerular filtration rate (eGFRCG), urine protein:creatinine (Cr) ratio (UPCR), markers of proximal tubular function (β2-microglobulin:Cr ratio [β2M:Cr] and retinol-binding protein:Cr ratio [RBP:Cr]) and investigator-reported renal adverse events (AEs). Week 48 data are presented. Results In the full cohort, F/TAF was associated with more favorable changes in eGFRCG, β2M:Cr, and RBP:Cr compared with F/TDF (Table 1). Treatment-emergent proteinuria by UA was more common with F/TDF than F/TAF (24.3% vs. 21.3% P = 0.009), as were treatment-emergent elevations in UPCR >200 mg/g (35 [1.5%] vs. 16 [0.7%], P = 0.005). Compared with F/TDF, participants taking F/TAF had numerically fewer study drug-related renal AEs, severe study drug-related renal AEs, and discontinuations due to renal AEs (Table 2). Proximal renal tubulopathy (Fanconi syndrome) was reported in one participant in the F/TDF arm and none in the F/TAF arm. In participants on F/TDF PrEP at enrollment who were randomized to F/TAF, statistically significant increases in eGFRCG were apparent as early as week 4 (Table 1 and Figure 1), as were decreases in tubular proteinuria (Table 1). Renal biomarker changes in PrEP-naïve participants mirrored those in the full cohort. Conclusion Through 48 weeks, MSM and TGW taking F/TAF for PrEP had significantly better measures of renal function and fewer study-drug-related renal AEs compared with those taking F/TDF; switching from F/TDF to F/TAF was associated with improvements in eGFRCG and tubular function biomarkers. F/TAF for PrEP is effective and has a superior renal safety profile compared with F/TDF. Disclosures All Authors: No reported Disclosures." @default.
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- W2982203495 date "2019-10-01" @default.
- W2982203495 modified "2023-10-02" @default.
- W2982203495 title "1962. Renal Outcomes for Participants Taking F/TAF vs. F/TDF for HIV PrEP in the DISCOVER Trial" @default.
- W2982203495 doi "https://doi.org/10.1093/ofid/ofz359.139" @default.
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