期刊
CURRENT OPINION IN LIPIDOLOGY
卷 20, 期 3, 页码 217-226出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/MOL.0b013e32832b3f4c
关键词
Akt; apoB; forkhead transcription factor; FoxO; lipoproteins; microsomal triglyceride transfer protein; very low-density lipoprotein
资金
- American Diabetes Association
- NIH [DK078131, DK066301]
- NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [R01DK078131, R01DK066301] Funding Source: NIH RePORTER
Purpose of review This review summarizes recent research implicating Forkhead box (Fox)01, a key transcription factor in glucose metabolism, in the regulation of hepatic lipid metabolism. Insulin dysregulation leading to hypertriglyceridemia is associated with increased hepatic VLDL secretion. FoxO1 is integrated in action with other regulatory factors in The role of FoxO1 is defined in context of recent controversies. VLDL metabolism. Recent findings FoxO1 regulates transcription of microsomal triglyceride transfer protein and apolipoprotein (apo)CIII involved in hepatic assembly and postsecretory catabolism of VLDL. Insulin activation of AM leads to the phosphorylation of FoxO1 with nuclear exclusion and loss of transcriptional activity. Reduced insulin action increases FoxO1 activity and induces microsomal triglyceride transfer protein favoring VLDL assembly and induces apoCIII reducing peripheral triglyceride catabolism. This new mechanistic link between insulin resistance and VLDL overproduction and hypertriglyceridemia compounds effects of other known VLDL regulatory factors. Summary This review highlights recent advances in research of insulin regulation of hepatic VLDL metabolism. Formation of VLDL requires Ill apoB structural protein, and microsomal triglyceride transfer protein. FoxO1 is a major factor in hepatic microsomal triglyceride transfer protein regulation. A unifying hypothesis is presented linking regulation of the three necessary hepatic components for VLDL assembly with insulin action and insulin resistance.
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