期刊
HYPERTENSION
卷 43, 期 4, 页码 707-713出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1161/01.HYP.0000120155.48024.6f
关键词
blacks; hypertension, essential; kidney; potassium; sodium
Based on racial differences in urinary potassium excretion and responses to diuretics, we present a model suggesting that a major cause of sodium sensitivity in blacks is an augmented activity of the Na-K-2Cl cotransport in the thick ascending limb of Henle's loop. This would result in an increased ability to conserve not only sodium but also water, and an upward and rightward shift in the operating point of tubuloglomerular feedback, which may cause an increase in the glomerular capillary hydraulic pressure and predilection to glomerular injury with and without hypertension. In this sense, the biological implication of sodium sensitivity in blacks and in humans in general has ramifications above and beyond salt-evoked increase in blood pressure.
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