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EFFECTS OF CHRONIC ETHANOL CONSUMPTION ON ADRENERGIC INDUCED CONTRACTIONS AND ENDOTHELIUM DEPENDENT RELAXATIONS IN RAT THORACIC AORTA    
Yazarlar
Engin Şahna
Fırat Üniversitesi, Türkiye
Z Kurcer
F Ozturk
Prof. Dr. Nureddin CENGİZ Prof. Dr. Nureddin CENGİZ
Sakarya Üniversitesi, Türkiye
N Vardı
M Bırıncıoglu
E Olmez
Özet
The effects of chronic oral administration of ethanol (7.2% daily during 24 weeks) on the contractions induced by phenylephrine (Phe) and the endothelium-dependent relaxation responses to acetylcholine (ACh) were studied in rat thoracic aorta. Ethanol pretreatment significantly attenuated the contractile responses to Phe, resulting in parallel shift of the concentration-response curve to the right. EC50 values of Phe were 64.6 +/- 11.2 and 95.5 +/- 8.5 nmol l(-1) in control and ethanol-fed rats, respectively. On the other hand, either calcium-induced contractions or relaxation responses to ACh and sodium nitroprusside were similar in the vessels of the control and ethanol-treated rats. These results suggest that chronic ethanol ingestion significantly attenuates the alpha(1)-adrenergic-induced contractions but does not affect the relaxation responses mediated by nitric oxide in rat aortic rings. (C) 2000 Academic Press.
Anahtar Kelimeler
ethanol | alpha-adrenergic | nitric oxide | rat aorta
Makale Türü Özgün Makale
Makale Alt Türü SSCI, AHCI, SCI, SCI-Exp dergilerinde yayımlanan tam makale
Dergi Adı PHARMACOLOGICAL RESEARCH
Dergi ISSN 1043-6618
Dergi Tarandığı Indeksler SCI-Expanded
Dergi Grubu Q4
Makale Dili İngilizce
Basım Tarihi 06-2000
Cilt No 41
Sayı 6
Sayfalar 629 / 633
Doi Numarası 10.1006/phrs.1999.0629
Makale Linki http://linkinghub.elsevier.com/retrieve/pii/S1043661899906291