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  • Title: Diuretics, urate excretion and sodium reabsorption: effect of acetazolamide and urinary alkalinization.
    Author: Steele TH, Manuel MA, Boner G.
    Journal: Nephron; 1975; 14(1):49-61. PubMed ID: 235746.
    Abstract:
    The uricosuric properties of acetazolamide were investigated in order to elucidate the relationship between changes in proximal tubular sodium reabsorption and urate excretion in man. Acetazolamide produced a modest uricosuric response which was not suppressible by pyrazinamide. Alkalinization of the urine with sodium bicarbonate elicited an even smaller increment in the urate clearance. If urinary alkalinization does play a role in the uricosuric response to acetazolamide, it probably decreases urate reabsorption within the distal nephron. The present studies, when taken together with previous work, suggest that alterations in proximal tubular sodium and water reabsorption probably do not play an important role in the normal control of urate excretion or in the pathogenesis of hyperuricemic states. Diuretic-induced hyperuricemia occurring during extracellular fluid volume depletion probably results from either diminished tubular secretion of urate, accelerated postsecretory urate reabsorption, or both.
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