Cystatin C-Based Renal Function Changes After Antiretroviral Initiation: A Substudy of a Randomized Trial. (16th April 2014)

• Record Type: Journal Article
• Authors: Gupta, Samir K.; Kitch, Douglas; Tierney, Camlin; Daar, Eric S.; Sax, Paul E.; Melbourne, Kathleen; Ha, Belinda; McComsey, Grace A.
• Is Part Of: Open forum infectious diseases. Volume 1:Number 1(2014)
• Publication Date: 2014-04-16
• Subjects: atazanavir -- creatinine -- cystatin C -- HIV-1 -- nephropathy -- tenofovir; Communicable diseases -- Periodicals; Medical microbiology -- Periodicals; Infection -- Periodicals; 616.9
• DOI: 10.1093/ofid/ofu003
• Languages: English
• ISSNs: 2328-8957

Abstract

Abstract: Background. The effects of antiretrovirals on cystatin C-based renal function estimates are unknown. Methods. We analyzed changes in renal function using creatinine and cystatin C-based estimating equations in 269 patients in A5224s, a substudy of study A5202, in which treatment-naive patients were randomized to abacavir/lamivudine or tenofovir/emtricitabine with open-label atazanavir/ritonavir or efavirenz. Results. Changes in renal function significantly improved (or declined less) with abacavir/lamivudine treatment compared with tenofovir/emtricitabine using the Cockcroft-Gault formula ( P = .016) and 2009 Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI; P = .030) and 2012 CKD-EPI cystatin C-creatinine ( P = .025). Renal function changes significantly improved (or declined less) with efavirenz compared with atazanavir/ritonavir ( P < .001 for all equations). Mean (95% confidence interval) renal function changes specifically for tenofovir/emtricitabine combined with atazanavir/ritonavir were −8.3 (−14.0, −2.6) mL/min with Cockcroft-Gault; −14.9 (−19.7, −10.1) mL/min per 1.73 2 with Modification of Diet in Renal Disease; −12.8 (−16.5, −9.0) mL/min per 1.73 2 with 2009 CKD-EPI; +8.9 (4.2, 13.7) mL/min per 1.73 2 with 2012 CKD-EPI cystatin C; and −1.2 (−5.1, 2.6) mL/min per 1.73 2 with 2012 CKD-EPI cystatin C-creatinine. Renal function changes for the other treatment arms were more favorable but similarly varied by estimating equation. Conclusions. Antiretroviral-associated changes in renal function vary in magnitude and direction based on the estimating equation used.