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Serum Uric Acid Exhibits Inverse Relationship with Estimated Glomerular Filtration Rate. Nephron 2016;134(4):231-237

Date

08/23/2016

Pubmed ID

27548821

DOI

10.1159/000448629

Abstract

BACKGROUND: In this study, we investigated the relationship between serum uric acid (SUA) and renal function in a unique patient cohort wherein SUA levels fluctuate during the course of standard care.

METHODS: Correlation coefficients between SUA and serum creatinine (SCr) and kinetic estimated GFR (KeGFR) were retrospectively investigated in acute myeloid leukemia (AML) patients, and statistically significant and clinically relevant determinants were studied in multiple regression models.

RESULTS: One hundred and twenty-six patients were included in the analysis. Baseline SUA was associated with an increased risk for acute kidney injury (AKI; OR 1.27, 95% CI 1.1-1.5, p = 0.003) and laboratory tumor lysis syndrome (OR 1.26, 95% CI 1.1-1.5, p = 0.005). Prophylactic uric acid-lowering therapy and hydration resulted in lower SUA values from baseline in 88.1% of the patients, the lowest values were observed on post-induction day 1 (20.4% reduction). Significant linear correlations were observed between SUA and SCr (r = 0.35, p < 0.001) values with a significant inverse correlation between SUA and KeGFR on day 1 (r = -0.33, p < 0.001) that persisted through day 4. By subgroup analysis, patients with primary AML (r = -0.49, p < 0.001), baseline SUA >5.5 mg/dl (r = -0.41, p = 0.002) and baseline eGFR >60 ml/min/1.73 m2 (r = -0.51, p < 0.001) demonstrated robust relationships between SUA and KeGFR. The relationship was more robust when the groups were combined (primary AML plus baseline SUA >5.5 mg/dl plus baseline eGFR >60 ml/min/1.73 m2, r = -0.52, p < 0.001).

CONCLUSION: The demonstration of linear relationship between SUA and SCr and inverse relationship between SUA and KeGFR reinforces the emerging translational physiological evidence regarding the role of uric acid in AKI.

Author List

Koratala A, Singhania G, Alquadan KF, Shimada M, Johnson RJ, Ejaz AA

Author

Abhilash Koratala MD Assistant Professor in the Medicine department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Acute Kidney Injury
Cohort Studies
Creatinine
Female
Glomerular Filtration Rate
Humans
Kidney Function Tests
Leukemia, Myeloid, Acute
Male
Middle Aged
Retrospective Studies
Tumor Lysis Syndrome
Uric Acid