A randomized, pilot trial to evaluate glomerular filtration rate by creatinine or cystatin C in naive HIV-infected patients after tenofovir/emtricitabine in combination with atazanavir/ritonavir or efavirenz

Laura Albini, Bruno Mario Cesana, Davide Motta, Emanuele Focà, Daria Gotti, Alessandra Calabresi, Ilaria Izzo, Rita Bellagamba, Rita Fezza, Pasquale Narciso, Laura Sighinolfi, Paolo Maggi, Eugenia Quiros-Roldan, Luigi Manili, Giovanni Guaraldi, Giuseppe Lapadula, Carlo Torti

Research output: Contribution to journalArticlepeer-review

Abstract

Background: Glomerular filtration rate (GFR) estimated by Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation based on creatinine or cystatine C may be more accurate methods especially in patients without chronic kidney disease. There is lack of data on GFR estimated by these methods in patients on highly active antiretroviral therapy. Methods: Antiretroviral-naive HIV-infected patients were randomized to tenofovir/emtricitabine in association with atazanavir/ritonavir (ATV/r) or efavirenz (EFV) Patients had to have an actual creatinine clearance >50 mL/minute (24-hour urine collection) and were followed for 48 weeks. RESULTS: Ninety-one patients (48 ATV/r, 43 EFV) were recruited. Using the CKD-EPI creatinine formula, there was a significant decrease in GFR up to week 48 in patients receiving ATV/r (4.9 mL/minute/m, P = 0.02) compared with a not statistically significant increment in patients prescribed EFV. Using the cystatin C-based equation, we found greater decrease in GFR in both arms, although, in the EFV arm, the decrease was not statistically significant (5.8 mL/minute/m, P = 0.92). At multivariable analysis, ATV/r was a significant predictor of greater decrease in estimated glomerular filtration rate (eGFR) (P = 0.0046) only with CKD-EPI creatinine. Conclusions: ATV/r plus tenofovir caused greater GFR decreases compared with EFV. The evaluation of eGFR by cystatin C confirmed this result, but this method seemed to be more stringent, probably precluding the possibility to detect a significant difference in the pattern of eGFR evolution between the two arms over time. More studies are needed to understand the clinical relevance of these alterations and whether cystatin C is a more appropriate method for monitoring GFR in clinical practice.

Original languageEnglish
Pages (from-to)18-24
Number of pages7
JournalJournal of Acquired Immune Deficiency Syndromes
Volume59
Issue number1
DOIs
Publication statusPublished - Jan 1 2012

Keywords

  • antiretroviral therapy
  • creatinine
  • cystatin C
  • glomerular filtration rate
  • HIV

ASJC Scopus subject areas

  • Infectious Diseases
  • Pharmacology (medical)

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