A sustained increase in plasma free fatty acids impairs insulin secretion in nondiabetic subjects genetically predisposed to develop type 2 diabetes.

Abstract excerpt

Acute elevations in free fatty acids (FFAs) stimulate insulin secretion, but prolonged lipid exposure impairs beta-cell function in both in vitro studies and in vivo animal studies. In humans data are limited to short-term (< or =48 h) lipid infusion studies and have led to conflicting results. We examined insulin secretion and action during a 4-day lipid infusion in healthy normal glucose tolerant subjects with...

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