title: Reciprocal regulation of endocytosis and metabolism.
abstract: The cellular uptake of many nutrients and micronutrients governs both their cellular availability and their systemic homeostasis. The cellular rate of nutrient or ion uptake (e.g., glucose, Fe(3+), K(+)) or efflux (e.g., Na(+)) is governed by a complement of membrane transporters and receptors that show dynamic localization at both the plasma membrane and defined intracellular membrane compartments. Regulation of the rate and mechanism of endocytosis controls the amounts of these proteins on the cell surface, which in many cases determines nutrient uptake or secretion. Moreover, the metabolic action of diverse hormones is initiated upon binding to surface receptors that then undergo regulated endocytosis and show distinct signaling patterns once internalized. Here, we examine how the endocytosis of nutrient transporters and carriers as well as signaling receptors governs cellular metabolism and thereby systemic (whole-body) metabolite homeostasis.
authors.affiliation: Department of Chemistry and Biology, Ryerson University, Toronto, Ontario M5B 2K3, Canada.
authors.forename: Costin N
authors.initials: CN
authors.lastname: Antonescu
authors.affiliation: Department of Biochemistry, Weill Medical College of Cornell University, New York, New York 10065.
authors.forename: Timothy E
authors.initials: TE
authors.lastname: McGraw
authors.affiliation: Program in Cell Biology, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada.
authors.forename: Amira
authors.initials: A
authors.lastname: Klip
mesh_terms: D001692:Biological Transport; D004705:Endocytosis / Q000502:physiology*; D005089:Exocytosis; D005947:Glucose / Q000378:metabolism; D051275:Glucose Transporter Type 4 / Q000378:metabolism / Q000502:physiology; D006706:Homeostasis; D026901:Membrane Transport Proteins / Q000378:metabolism / Q000502:physiology; D053858:Metabolic Networks and Pathways; D008954:Models, Biological; D015398:Signal Transduction
chemical_list: D051275:Glucose Transporter Type 4; D026901:Membrane Transport Proteins; D005947:Glucose