title: Changes of asymmetric dimethylarginine, nitric oxide, tetrahydrobiopterin, and oxidative stress in patients with acute myocardial infarction by medical treatments.
abstract: The relationship among the nitric oxide synthase (NOS) inhibitor [asymmetric dimethylarginine (ADMA)], NOS cofactor [tetrahydrobiopterin (BH(4))], and superoxide anion in the patients with acute myocardial infarction (AMI) is still unknown. This study sought to assess the NOS inhibitor and cofactor with oxidative stress in AMI patients (n=9) during initial administration and 4 weeks after medical treatments. We measured plasma NOS inhibitor and cofactor (ADMA and BH(4)) by HPLC and plasma oxidized-LDL by ELISA. Blood samples from age-matched healthy volunteers (n=9) were taken for comparison. In AMI, plasma ADMA, oxidized-BH(4) (BH(2)+biopterin) and oxidized-LDL significantly increased (P<0.0001, P<0.01 and P<0.05 vs. healthy volunteers) and plasma BH(4), plasma nitrate and L-arginine/ADMA significantly decreased compared with healthy volunteers (P<0.0001, P<0.05 and P<0.005 vs. healthy volunteers). Medical treatments improved plasma ADMA, nitrate, BH(4) and oxidized-LDL. In conclusion, ADMA increased, and NO and BH(4) decreased with oxidative stress in AMI, and these mediators improved in AMI patients with medical treatments. These findings indicated that inhibition of NOS with oxidative stress plays a crucial role in endothelial dysfunction in patients with AMI.
authors.affiliation: Department of Medical Engineering and Systems Cardiology, Kawasaki Medical School, Kurashiki, Japan. yada@me.kawasaki-m.ac.jp
authors.forename: Toyotaka
authors.initials: T
authors.lastname: Yada
authors.forename: Shuichiro
authors.initials: S
authors.lastname: Kaji
authors.forename: Takashi
authors.initials: T
authors.lastname: Akasaka
authors.forename: Seiichi
authors.initials: S
authors.lastname: Mochizuki
authors.forename: Yasuo
authors.initials: Y
authors.lastname: Ogasawara
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tanemoto
authors.forename: Kiyoshi
authors.initials: K
authors.lastname: Yoshida
authors.forename: Fumihiko
authors.initials: F
authors.lastname: Kajiya
mesh_terms: D000328:Adult; D000368:Aged; D001120:Arginine / Q000031:analogs & derivatives* / Q000097:blood; D001708:Biopterins / Q000031:analogs & derivatives* / Q000097:blood; D016022:Case-Control Studies; D004358:Drug Therapy; D004730:Endothelium, Vascular / Q000503:physiopathology; D005260:Female; D006801:Humans; D008077:Lipoproteins, LDL / Q000097:blood; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000188:drug therapy / Q000378:metabolism* / Q000473:pathology; D009569:Nitric Oxide / Q000097:blood*; D018384:Oxidative Stress / Q000187:drug effects*; D013481:Superoxides / Q000097:blood
chemical_list: D008077:Lipoproteins, LDL; C099252:oxidized low density lipoprotein; D013481:Superoxides; D001708:Biopterins; D009569:Nitric Oxide; C018524:N,N-dimethylarginine; D001120:Arginine; C003402:sapropterin