Medical Degree
Boston University School of Medicine Boston, Massachusetts
Michael Reese Hospital and Medical Center
Yale University School of Medicine

Areas of Interest

Clinical Interests

Pre-ESRD, ESRD, Dialysis, Hemo, Acid-Base/Electrolytes

Research Interests

His laboratory studies the molecular mechanisms of hypertension in insulin-resistant states. He equips trainees with expertise in insulin signaling and vascular biology. Insulin can inhibit vascular smooth muscle cell migration, and insulin’s failure to do so in insulin-resistant states might contribute to enhanced atherosclerosis. His group is testing the overall hypothesis that insulin acts synergistically with nitric oxide to stimulate cyclic GMP production, which inhibits VSMC migration in-vitro, and testing whether insulin inhibits VSMC migration in-vivo after balloon catheter injury of carotid arteries in normal and insulin resistant obese dogs. The effects of insulin on cultured VSMC aerobic glycolysis, redox potential, cyclic GMP levels, Cai2+, CaM kinase II and MAPK phosphorylation and activities and MKP-1 expression are being assessed. VSMC migration is measured via Boyden Chamber and wound migration assays. The role of MKP-1 and potential cross talk between CaM kinase II and MAPK is being studied using antisense oligonucleotides and/or transfections with dominant negative or constitutively active mutants. Migration of VSMCs following balloon injury of dog carotid artery is being assessed by measuring the progression of BrdU, smooth muscle ?-actin and iNOS labeled VSMCs from the media to the neointima. These studies will determine the mechanism for insulin’s inhibition of VSMC migration and may help explain the link between enhanced atherosclerosis/restenosis and insulin resistance.

Board Certifications

  • American Board of Internal Medicine
  • Subspecialty of Nephrology