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Diabetic microvascular complications: possible targets for improved macrovascular outcomes

Authors John A D’Elia, George Bayliss, Bijan Roshan, et al

Published 22 December 2010 Volume 2011:4 Pages 1—15


Review by Single-blind

Peer reviewer comments 3

John A D’Elia1, George Bayliss1,2, Bijan Roshan1, Manish Maski1, Ray E Gleason1, Larry A Weinrauch1
1Renal Unit, Joslin Diabetes Center, Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA; 2Department of Medicine, Rhode Island Hospital, Alpert School of Medicine, Brown University, Providence, RI, USA

Abstract: The results of recent outcome trials challenge hypotheses that tight control of both glycohemoglobin and blood pressure diminishes macrovascular events and survival among type 2 diabetic patients. Relevant questions exist regarding the adequacy of glycohemoglobin alone as a measure of diabetes control. Are we ignoring mechanisms of vasculotoxicity (profibrosis, altered angiogenesis, hypertrophy, hyperplasia, and endothelial injury) inherent in current antihyperglycemic medications? Is the polypharmacy for lowering cholesterol, triglyceride, glucose, and systolic blood pressure producing drug interactions that are too complex to be clinically identified? We review angiotensin–aldosterone mechanisms of tissue injury that magnify microvascular damage caused by hyperglycemia and hypertension. Many studies describe interruption of these mechanisms, without hemodynamic consequence, in the preservation of function in type 1 diabetes. Possible interactions between the renin–angiotensin–aldosterone system and physiologic glycemic control (through pulsatile insulin release) suggest opportunities for further clinical investigation.

Keywords: angiotensin-converting enzyme inhibitor, pulsatile insulin, diabetic nephropathy, cardiac autonomic neuropathy, podocytes, beta cells

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