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Correlation of sodium-related factors with insulin sensitivity in young, lean, male offspring of hypertensive and normotensive subjects

Abstract

Pioneer studies have proposed that multiple metabolic abnormalities, such as insulin resistance, increased Na+-H+ exchanger activity and abnormal intracellular calcium homeostasis, are frequently associated with a subset of essential hypertensive patients with low plasma renin activity (PRA). However, it is unclear whether insulin resistance is related to the low renin status in the very early phase of genetical hypertension. Besides, there is controversy on the subject of the in vivo effect of acute hyperinsulinaemia on sodium-related factors. We investigated the relationship between sodium-related parameters and insulin sensitivity, and the effects of euglycaemic hyperinsulinaemia on cyclic guanosine monophosphate (cGMP) and atrial natriuretic peptide (ANP) levels in 17 young, lean, normotensive male subjects, who displayed extreme predispositions for the development of hypertension. PRA was significantly lower in the positive than in the negative family history group (P < 0.05). Insulin sensitivity (M-value) was correlated with PRA before euglycaemic hyperinsulinaemic clamping (r = 0.577, P < 0.05), and was also inversely correlated with fractional excretion of sodium (FENa) before clamping (r = −0.51, P < 0.05). Euglycaemic hyperinsulinaemia significantly decreased PRA (P < 0.0001) and increased cGMP (P < 0.05) and ANP levels (P < 0.01). In conclusion, insulin sensitivity may be partially determined by PRA levels and FENa before clamping in young, lean, normotensive male subjects. Acute euglycaemic hyperinsulinaemia decreases PRA, and increases cGMP and ANP levels from the fasting condition.

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Ohno, Y., Suzuki, H., Yamakawa, H. et al. Correlation of sodium-related factors with insulin sensitivity in young, lean, male offspring of hypertensive and normotensive subjects. J Hum Hypertens 15, 393–399 (2001). https://doi.org/10.1038/sj.jhh.1001211

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