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Surial, Bernard; Ledergerber, Bruno; Calmy, Alexandra; Cavassini, Matthias; Günthard, Huldrych F; Kovari, Helen; Stöckle, Marcel; Bernasconi, Enos; Schmid, Patrick; Fux, Christoph A; Furrer, Hansjakob; Rauch, Andri; Wandeler, Gilles
The Journal of infectious diseases, 07/2020, Volume: 222, Issue: 4Journal Article
Abstract Background Replacing tenofovir disoproxil fumarate (TDF) with tenofovir alafenamide (TAF) improves renal tubular markers in HIV-infected individuals but the impact on estimated glomerular filtration rate (eGFR) remains unclear. Methods In all participants from the Swiss HIV Cohort Study who switched from TDF to TAF-containing antiretroviral regimen or continued TDF, we estimated changes in eGFR and urine protein-to-creatinine ratio (UPCR) after 18 months using mixed-effect models. Results Of 3520 participants (26.6% women, median age 50 years), 2404 (68.5%) switched to TAF. Overall, 1664 (47.3%) had an eGFR <90 mL/min and 1087 (30.9%) an UPCR ≥15 mg/mmol. In patients with baseline eGFR ≥90 mL/min, eGFR decreased with the use of TDF and TAF (−1.7 mL/min). Switching to TAF was associated with increases in eGFR of 1.5 mL/min (95% confidence interval CI, .5–2.5) if the baseline eGFR was 60–89 mL/min, and 4.1 mL/min (95% CI, 1.6–6.6) if <60 mL/min. In contrast, eGFR decreased by 5.8 mL/min (95% CI, 2.3–9.3) with continued use of TDF in individuals with baseline eGFR <60 mL/min. UPCR decreased after replacing TDF by TAF, independent of baseline eGFR. Conclusions Switching from TDF to TAF improves eGFR and proteinuria in patients with renal dysfunction. We assessed changes in renal function after replacing TDF with TAF in a national cohort of HIV-infected individuals. Among patients with established renal dysfunction, urinary protein-to-creatinine ratio and eGFR improved after the switch to TAF.
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