Dysfunction of myocardial and vascular taurine transport in spontaneously hypertensive rats.
- Author:
Yan-Rong SHI
1
;
Yong-Fen QI
;
Ding-Fang BU
;
Lin GAO
;
Dong-Yan WANG
;
Hong-Feng JIANG
;
Yong-Zheng PANG
;
Chao-Shu TANG
Author Information
1. Institute of Cardiovascular Disease Research, The First Hospital of Peking University, Beijing, China.
- Publication Type:Journal Article
- MeSH:
Animals;
Blood Vessels;
metabolism;
physiopathology;
Carrier Proteins;
metabolism;
Heart;
physiopathology;
In Vitro Techniques;
Male;
Myocardium;
metabolism;
Rats;
Rats, Inbred SHR;
Rats, Inbred WKY;
Taurine;
metabolism
- From:
Acta Physiologica Sinica
2002;54(5):359-364
- CountryChina
- Language:English
-
Abstract:
The alterations of taurine transport and the expression of taurine transporter (TAUT) mRNA in myocardium and aortic wall were investigated in spontaneously hypertensive rats (SHR) and Wistar-Kyoto (WKY) rats. It was demonstrated that plasma taurine concentration and taurine release from myocardium and aortic wall in SHR were higher than those in WKY rats, whereas taurine content, taurine uptake and TAUT mRNA in myocardium and aortic wall of SHR were lower than those of WKY rats. In SHR, the maximal velocity (V(max)) of taurine transportation in myocardium and aortic wall was lower by 24% (P<0.05) and 35% (P<0.05) than that in WKY, their michaelis constants (Km) values were higher by 16% (P<0.05) and 39% (P<0.05), respectively. The results suggest that there is dysfunction of taurine transport in myocardium and aortic wall in SHR, which may be partly resulted from the decrease of TAUT activity and affinity, and down-regulation of TAUT gene expression.
