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- W2022269558 abstract "Hyperinsulinemia in central type (upper body) obesity has been related to reduced hepatic insulin uptake caused by fatty acids reaching the portal vein directly from the omental (visceral) fat depot. We investigated the effect of sodium oleate and fatty acid-rich buffer recovered from incubation of omental adipocytes with 10(-7) M epinephrine on specific [125I]insulin uptake (at 37 C) in freshly prepared and cultured hepatocytes and nonparenchymal liver cells isolated from 200-250 g rats. In hepatocytes, insulin uptake was studied after standard cell isolation and washing and after additional repeated 30-min washings at 37 C. In the vigorously washed hepatocytes, both fatty acid rich buffer (from 0.08-1.3 mM) and sodium oleate (from 0.0125-1.2 mM) decreased insulin uptake maximally by approximately 30% and approximately 40%, respectively (P < 0.005); a biphasic effect of fatty acids was observed, with maximal inhibition occurring at 0.08-0.1 mM. Without vigorous washing, oleate had no effect on insulin uptake in either freshly prepared or cultured hepatocytes and nonparenchymal cells. The reason for the observed inhibitory effect of fatty acids on insulin uptake in vigorously washed cells remains unknown, but the effect is unlikely to be physiologically important. Thus, our data do not support the hypothesis that the increased concentration of fatty acids in the portal vein is responsible for reduced hepatic insulin uptake and hyperinsulinemia in upper body obesity." @default.
- W2022269558 created "2016-06-24" @default.
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- W2022269558 date "1993-12-01" @default.
- W2022269558 modified "2023-10-17" @default.
- W2022269558 title "Effects of oleate and fatty acids from omental adipocytes on insulin uptake in rat liver cells." @default.
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- W2022269558 doi "https://doi.org/10.1210/endo.133.6.8243313" @default.
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