PMID: 3771090Jan 1, 1986Paper

Studies on the impaired metabolism of uric acid in obese subjects: marked reduction of renal urate excretion and its improvement by a low-calorie diet

International Journal of Obesity
S YamashitaS Tarui

Abstract

Uric acid metabolism was investigated in 27 overweight subjects, 11 men (176 +/- 30 percent of ideal body weight) and 16 women (169 +/- 20 percent of ideal body weight). They were all hospitalized and treated with low-calorie diets (1,500-800 kcal/day) with gradual reduction of total calorie intake; exercise therapy (walking, and riding a bicycle ergometer) was added to this regimen afterwards. On admission, serum levels of uric acid were significantly elevated to 9.2 +/- 1.9 mg/dl in males (control 5.1 +/- 0.8 mg/dl) (P less than 0.001) and 6.8 +/- 1.9 mg/dl in females (control 4.4 +/- 1.0 mg/dl) (P less than 0.001), while the ratios (percentages) of uric acid clearance (CuA) to creatinine clearance (Ccr) were significantly reduced to 4.0 +/- 2.1 percent in males (control 10.8 +/- 2.2 percent) (P less than 0.001) and 5.2 +/- 3.1 percent in females (control 11.8 +/- 2.9 percent) (P less than 0.001). Urinary urate excretions were also lower in obese subjects than in controls. These data suggest that hyperuricemia in obese people is mainly attributed to an impaired renal clearance of uric acid rather than overproduction. In the course of weight reduction by a low-calorie diet, CuA/Ccr ratios gradually rose up to almost normal lev...Continue Reading

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