Effect of curcumin on oxidative stress, inflammatory response and kidney biochemical parameters among kidney disease patients: A systematic review

Abstract

Chronic kidney disease (CKD) and end-stage renal diseases, has high global morbidity and mortality. We aimed to investigate the antioxidant and anti-inflammatory properties of curcumin and its impact on kidney biochemical parameters associated with kidney disease among CKD and hemodialysis (HD) patients. The intended keywords were used in the literature search. Clinical trial studies from the very beginning to December 25th, 2021, indexed in the Institute for Scientific Information (ISI), Scopus, and PubMed databases were included in the review. Records with no accessible full texts, non-English language articles, and studies that were not related to the study aim were excluded. The agreement for exclusion required all authors to concur. Finally, after reviewing all available literature, 27 articles were included in this systematic review. Curcumin supplementation increased antioxidant capacity by improving catalase (CAT) activity, free radical scavenging activity, and, nuclear factor erythroid 2–related factor 2 (Nrf2). It also reduced hs-CRP, IL-6, and, TNF-a levels in patients with CKD and HD patients. Different results were reported regarding the effect of curcumin on kidney-related biochemical parameters. But mostly the results showed that there are no significant changes were seen in glomerular filtration (GFR), albumin (Alb), serum creatinine (sCr), proteinuria (PRO), and blood urea nitrogen (BUN) in these patients. Although it seems curcumin improved antioxidant capacity and decreased inflammatory cytokines in CKD and HD patients, it did not affect renal biochemical parameters. More clinical studies with larger sample sizes appear to be needed.