Urinary Uromodulin/Creatinine Ratio as a Potential Clinical Biomarker for Chronic Kidney Disease Patients with Gout: A Pilot Study.
OBJECTIVE
Recent studies have reported that reduced excretion of urinary uromodulin is associated with renal tubular function and risks of progressive kidney disease. Gouty nephropathy is usually seen in patients with gout. Patients with chronic gouty nephropathy are characterized by the deposition of monosodium urate crystals primarily involving the collecting ducts in the medulla. We postulated that this correlation may be specific to gout and may serve as a useful biomarker for chronic kidney disease (CKD).


MATERIALS AND METHODS
A total of 114 Taiwanese patients diagnosed with gout (n = 72), CKD (n = 26), or healthy volunteers (n = 16) were prospectively enrolled for this study from the Rheumatology and Nephrology Outpatient Clinics of our institution. We obtained urine and blood samples on patient visits to the outpatient clinics. Demographic data were obtained from medical records.


RESULTS
In patients with gout, the spot urinary uromodulin/creatinine ratio (uUMCR; mg/g) in patients with CKD was significantly lower than that in those without CKD (CKD group: 2.2; non-CKD group: 5.6, p = 0.005). Multivariate analysis revealed that patients with CKD and gout had a lower uUMCR than those with gout alone (p = 0.028). A significant association was not observed in our non-gout cohort.


CONCLUSION
The association of decreased uUMCR with CKD status was identified only in patients with gout in the present study. We believe that uUMCR might serve as an indicator of differential CKD in patients with gout.
['Wu|Chien-Hsing|CH|', 'Yang|Chih-Chao|CC|', 'Chang|Hsueh-Wen|HW|', 'Huang|Bin|B|', 'Chen|Chung-Jen|CJ|', 'Lin|Eton I-Cheng|EI|', 'Wu|Chien-Yi|CY|', 'Chung|Yueh-Hua|YH|', 'Hsu|Yu-Han|YH|', 'Lee|Chien-Te|CT|', 'Chuang|Feng-Rong|FR|']
D000328:Adult D000368:Aged D015415:Biomarkers D003404:Creatinine D005260:Female D006073:Gout D006801:Humans D007677:Kidney Function Tests D008297:Male D008875:Middle Aged D010865:Pilot Projects D011446:Prospective Studies D051436:Renal Insufficiency, Chronic D012959:Socioeconomic Factors D013624:Taiwan D058949:Uromodulin
Uromodulin Chronic kidney disease Gout Hyperuricemia Uric acid