Postprandial control of fatty acid transport proteins' subcellular location is not dependent on insulin.
Fatty acid transport proteins rapidly translocate to the plasma membrane in response to various stimuli, including insulin, influencing lipid uptake into muscle. However, our understanding of the mechanisms regulating postprandial fatty acid transporter subcellular location remains limited. We demonstrate that the response of fatty acid transporters to insulin stimulation is extremely brief and not temporally matched in the postprandial state. We further show that high-fat diet-induced accumulation of fatty acid transporters on the plasma membrane can occur in the absence of insulin. Altogether, these data suggest that insulin is not the primary signal regulating fatty acid transporter relocation in vivo.
Department of Human Health and Nutritional Sciences, University of Guelph, Canada.
Laelie A
LA
Snook
Department of Human Health and Nutritional Sciences, University of Guelph, Canada.
David C
DC
Wright
Department of Human Health and Nutritional Sciences, University of Guelph, Canada.
Graham P
GP
Holloway
D000818:Animals; D002462:Cell Membrane / Q000378:metabolism / Q000648:ultrastructure; D003921:Diabetes Mellitus, Experimental / Q000378:metabolism* / Q000473:pathology; D059305:Diet, High-Fat; D050612:Fatty Acid Transport Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D007328:Insulin / Q000008:administration & dosage* / Q000378:metabolism; D009132:Muscles / Q000378:metabolism* / Q000473:pathology; D019518:Postprandial Period; D051381:Rats; D015398:Signal Transduction / Q000187:drug effects
D050612:Fatty Acid Transport Proteins; D007328:Insulin
fatty acid transporters; free fatty acids; insulin; streptozotocin