QualificationsM.D., Harvard University, Genetics, 1992. B.S., Yale University, Electrical Engineering, 1986. Expertise and Research InterestsOur work focuses on the molecular mechanisms by which insulin regulates glucose uptake and utilization in fat and muscle. The GLUT4 glucose transporter is expressed almost exclusively in these tissues, and the number and activity of these transporters at the cell surface controls the rate of glucose uptake. Insulin acts within minutes to redistribute GLUT4 glucose transporters from an intracellular location to the cell surface, thereby enhancing glucose uptake in a highly regulated manner. This action of insulin is defective in individuals with type 2 diabetes or pre-diabetic (insulin-resistant) physiology. Thus, a detailed knowledge of how insulin controls GLUT4 trafficking is essential to a full understanding of the defects underlying type 2 diabetes. Control of GLUT4 trafficking is also of significant interest as a fundamental problem in cell biology. Unlike proteins that recycle constitutively at the plasma membrane, GLUT4 is efficiently retained within cells in the absence of insulin. The mechanisms for this retention are unclear, and GLUT4 appears to be targeted to a post-endosomal compartment that remains poorly defined. The major effect of insulin is to mobilize this pool of retained GLUT4 to the plasma membrane. Similar mechanisms may control other transporters that recycle at the plasma membrane in a homonally regulated manner. We developed a novel and efficient functional strategy to identify proteins through which insulin regulates GLUT4 trafficking. This method relies on flow cytometry to enrich for cells stably expressing particular proteins, within an adipocyte cDNA library, that alter the proportion of GLUT4 at the plasma membrane. Using this technique we identified at least one novel protein, TUG, that controls GLUT4 trafficking, and linking hormonal regulation of GLUT4 to the action of ubiquitin-like proteins. Current work focuses on elucidating the detailed mechanism by which this protein functions. Additional projects will examine the role of this protein in organism-level physiology. Other ExpertiseI wish to be contacted by interested students (medical, graduate, or undergraduate) and postdoctorals as a potential research advisor. KeywordsCOS Keywords:Cell Biology, Confocal Microscopy, Diabetes, Digestive Diseases and Disorders, Digestive System, Electrical Engineering or Electronics, Endocrinology, Flow Cytometry, Fluorescence, Genetics, Higher Education, Insulin, Internal Medicine, Kidney (Renal) Functions, Kidney Disease, Laboratory Animal Science, Medical Education, Membranes, Metabolism, Microscopy, Signal Transduction, Urology.Additional Terms:Adipocyte, Biological Signal Transduction, Cell Membrane, Confocal Scanning Microscopy, Fluorescence Microscopy, Glucose Transporter, Hormone Regulation Control Mechanism, Insulin, Insulin Receptor, Laboratory Mouse, Receptor Binding, Secretion, Vesicle Vacuole.MembershipsAmerican Association for the Advancement of Science American College of Physicians American Diabetes Association American Society for Biochemistry and Molecular Biology American Society for Cell Biology Massachusetts Medical Society Honors and Awards2006, Distinguished Young Scholar in Medical Research,
W. M. Keck Foundation
1993, Research Award for Clinical Trainees,
NIH Office of Education
1992, M.D. degree summa cum laude,
1992, Leon Resnick Memorial Prize for excellence and accomplishment in research,
Harvard Medical School
1986, B.S. degree cum laude,
1986, Jim Clarke Prize for excellence in Electrical Engineering,
Yale College
1986, Sigma Xi
Previous Positions2001-2002, Assistant Professor,
Harvard University,
Medical School,
Medicine,
Diabetes Unit, Massachusetts General Hospital
1998-2001, Instructor,
Harvard University,
Medical School,
Medicine,
Diabetes Unit, Massachusetts General Hospital
1994-1998, Clinical and Research Fellow,
Massachusetts General Hospital,
Harvard Medical School,
Endocrine Division
1992-1994, Intern and Resident,
Massachusetts General Hospital,
Medicine
PatentsFunding Received
Publications
Profile DetailsLast Updated: 4/19/2007 COS Expertise ID #531359 Reference this profile directly: http://myprofile.cos.com/boganj59 Individual Expertise profile of Jonathan S. Bogan, Copyright Jonathan S. Bogan. © COS ExpertiseTM, 2008, ProQuest LLC All rights reserved. |