PMID: 9181099Oct 1, 1996Paper

Reduced renal sodium excretion in primary hypertensive patients after an oral glucose load

Brazilian Journal of Medical and Biological Research = Revista Brasileira De Pesquisas Médicas E Biológicas
J A Gontijo, E O Muscelli

Abstract

This study was designed to determine urinary sodium excretion in response to an oral glucose load in hypertensive patients. Fifteen hypertensive patients and eighteen normotensive subjects were studied after an overnight fast and for 4 h after the ingestion of 100 g glucose. A subgroup of untreated, nonobese, primary hypertensive patients (five of the 15 hypertensive patients) became hyperinsulinemic (total area under the insulin curve [TAUC]: 33,080 +/- 3348 microU ml(-1) 120 min-1) in response to an oral glucose load compared to normotensive subjects (TAUC: 3670 < 13.731 < 23,693 microU ml(-1) 120 min-1) or to be other subgroup of normoinsulinemic hypertensive individuals TAUC: 10,221 +/- 1615 microU ml-1 120 min-1) despite a similar serum glucose concentration in both groups. A significant decrease in renal sodium excretion in the entire hypertensive group (47.1 +/- 4.7%, P < 0.019) compared to the normotensive (20.0 +/- 10.5%) subjects was also observed during the oral glucose tolerance test. Decreased renal sodium excretion was followed by a transient increase in urinary acid excretion. We speculate that the increase in insulin secretion may be responsible for the sodium-dependent increase in intracellular Ca2+, cellular H...Continue Reading

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