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Elevated concentration of plasma non-esterified fatty acids (NEFA) is now recognized as a key factor in the onset of insulin-resistance and type 2 diabetes mellitus. During fasting, circulating NEFAs arise from white adipose tissue (WAT) as a consequence of lipolysis from stored triacylglycerols. However, a significant part of these FAs (30-70%) is re-esterified within the adipocyte, so that a recycling...
Cytosolic phosphoenolpyruvate carboxykinase (PEPCK-C) is the key enzyme in glyceroneogenesis, an important metabolic pathway in adipocytes for reesterification of fatty acids during fasting. Dysregulation of glyceroneogenesis could play a role in the increase in plasma non-esterified fatty acids that accompanies type 2 diabetes. In rodent adipocyte transcription of the PEPCK-C gene is induced by thiazolidinediones...
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