title: Role of asymmetric dimethylarginine (ADMA) in diabetic vascular complications.
abstract: Nitric oxide (NO) is a well-recognized anti-atherogenic factor; it inhibits the inflammatory-proliferative processes in atherosclerosis. Indeed, endothelial dysfunction due to reduced synthesis and/or bioavailability of NO is thought to be an early step in the course of atherosclerotic cardiovascular disease (CVD). NO is synthesized from L-arginine via the action of NO synthase (NOS), which is known to be blocked by endogenous L-arginine analogues such as asymmetric dimethylarginine (ADMA), a naturally occurring amino acid found in plasma and various types of tissues. Recently, it has been demonstrated that plasma levels of ADMA are elevated in patients with diabetes. These findings suggest that the elevated ADMA in diabetes could contribute to acceleration atherosclerosis in this population. Further, since ADMA is mainly metabolized by dimethylarginine dimethylaminohydrolase (DDAH), it is conceivable that the inhibition of ADMA via up-regulation of DDAH may be a novel therapeutic target for the prevention of CVD in patients with diabetes. In this paper, we review the pathophysiological role of ADMA and DDAH system for accelerated atherosclerosis in diabetes and the therapeutic utility of ADMA suppression in CVD in diabetes.
authors.affiliation: Department of Pathophysiology and Therapeutics of Diabetic Vascular Complications, Kurume University School of Medicine, Kurume 830-0011, Japan. shoichi@med.kurume-u.ac.jp
authors.forename: Sho-ichi
authors.initials: S
authors.lastname: Yamagishi
authors.forename: Seiji
authors.initials: S
authors.lastname: Ueda
authors.forename: Kazuo
authors.initials: K
authors.lastname: Nakamura
authors.forename: Takanori
authors.initials: T
authors.lastname: Matsui
authors.forename: Seiya
authors.initials: S
authors.lastname: Okuda
mesh_terms: D000581:Amidohydrolases / Q000378:metabolism / Q000502:physiology; D000818:Animals; D001120:Arginine / Q000031:analogs & derivatives* / Q000037:antagonists & inhibitors / Q000378:metabolism / Q000502:physiology; D003925:Diabetic Angiopathies / Q000188:drug therapy / Q000201:enzymology / Q000378:metabolism* / Q000503:physiopathology; D006801:Humans; D019001:Nitric Oxide Synthase / Q000037:antagonists & inhibitors / Q000378:metabolism; D012307:Risk Factors
chemical_list: C018524:N,N-dimethylarginine; D001120:Arginine; D019001:Nitric Oxide Synthase; D000581:Amidohydrolases; C059999:dimethylargininase