title: beta1 antagonist and beta2 agonist, celiprolol, restores the impaired endothelial dependent and independent responses and decreased TNFalpha in rat with type II diabetes.
abstract: The effect of beta antagonists in the diabetic vascular lesion is controversial. We investigated the effect of celiprolol hydrochloride, a beta1 antagonist and mild beta2 agonist, on the lesions and function in type II male Otsuka Long-Evans Tokushima Fatty (OLETF) diabetic rats. OLETF rats were fed regular chow with or without atenolol (25 mg/kg/day) or celiprolol (100 mg/kg/day) treatment (group DM, no treatment; group DM-a, atenolol treatment; group DM-c, celiprolol treatment), and treatment was continued for 31 days. Separately, normoglycemic control rats, LETO, were prepared as group C. On day 3, endothelial cells of the right internal carotid artery were removed by balloon injury, and the rats were evaluated 4 weeks after balloon injury. The plasma glucose and lipid levels were unchanged throughout the treatment period. Intimal thickening was observed in the right carotid artery in the DM and DM-a groups; however, little thickening was observed in those of DM-c rats. Acetylcholine-induced NO-dependent relaxation in arteries was improved in DM-c rats compared with DM and DM-a rats (maximum relaxation DM 30.8+/-4.5, DM-a 37.4+/-3.9, DM-c 48.8+/-4.6%, *P<0.05 vs. DM for DM-c rats). Tone-related basal NO release and acetylcholine-induced NO-dependent relaxation in the arteries and plasma NO(x) (sum of NO(2)(-) and NO(3)(-)) were greater in DM-c and C groups than in DM and DM-a groups. The serum TNFalpha levels did not increase in DM-c rats compared with those of the DM or DM-a groups, and were comparable with those of group C.
  
  
  CONCLUSIONS
  In conclusion, Celiprolol improves endothelial function in the arteries of OLETF rats, and further restore it 4 weeks after endothelial denudation in the arteries of OLETF rats. NO and O(2)(-) may have a role in the important underlying mechanisms by reducing the TNFalpha levels.
authors.affiliation: Department of Geriatrics, Nagoya University Graduate School of Medicine, Tsuruma-cho, Showa-ku, Nagoya, Japan 466-8550. hayashi@med.nagoya-u.ac.jp
authors.forename: Toshio
authors.initials: T
authors.lastname: Hayashi
authors.forename: Packiasamy A R
authors.initials: PA
authors.lastname: Juliet
authors.forename: Asaka
authors.initials: A
authors.lastname: Miyazaki-Akita
authors.forename: Jun
authors.initials: J
authors.lastname: Funami
authors.forename: Hisako
authors.initials: H
authors.lastname: Matsui-Hirai
authors.forename: Akiko
authors.initials: A
authors.lastname: Fukatsu
authors.forename: Akihisa
authors.initials: A
authors.lastname: Iguchi
mesh_terms: D058671:Adrenergic beta-1 Receptor Antagonists; D058666:Adrenergic beta-2 Receptor Agonists; D000818:Animals; D001012:Aorta, Abdominal / Q000378:metabolism; D050197:Atherosclerosis / Q000378:metabolism / Q000517:prevention & control; D001794:Blood Pressure / Q000187:drug effects; D001835:Body Weight / Q000187:drug effects; D017272:Celiprolol / Q000494:pharmacology / Q000627:therapeutic use*; D003921:Diabetes Mellitus, Experimental / Q000150:complications* / Q000378:metabolism; D003924:Diabetes Mellitus, Type 2 / Q000150:complications* / Q000378:metabolism; D003925:Diabetic Angiopathies / Q000378:metabolism / Q000517:prevention & control; D004730:Endothelium, Vascular / Q000378:metabolism*; D008297:Male; D009566:Nitrates / Q000097:blood; D009569:Nitric Oxide / Q000378:metabolism; D009573:Nitrites / Q000097:blood; D051381:Rats; D020318:Rats, Long-Evans; D013481:Superoxides / Q000378:metabolism; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*
chemical_list: D058671:Adrenergic beta-1 Receptor Antagonists; D058666:Adrenergic beta-2 Receptor Agonists; D009566:Nitrates; D009573:Nitrites; D014409:Tumor Necrosis Factor-alpha; D013481:Superoxides; D009569:Nitric Oxide; D017272:Celiprolol