DOI QR코드

DOI QR Code

Effects of Endothelin A Receptor Antagonist BQ123 on Femoral Artery Pressure and Pulmonary Artery Pressure in Broiler Chickens

Wang, Huiyu;Qiao, Jian;Gao, Mingyu;Yang, Ying;Li, Kai;Wang, Jianlin;Tian, Yong;Xu, Tong

  • 투고 : 2006.10.11
  • 심사 : 2007.04.16
  • 발행 : 2007.10.01

초록

Endothelin-1 (ET-1) is an important factor in regulation of cardiovascular tone in humans and mammals, but the biological function of ET-1 in the avian vascular system has not been determined. The purpose of this study was to characterize the role of endogenous ET-1 in the vascular system of poultry by investigating the effect of endothelin A receptor ($ET_AR$) antagonist BQ123 on the femoral artery pressure (FAP) and the pulmonary artery pressure (PAP) in broiler chickens. First, we found that plasma and lung homogenate ET-1 levels were both increased with age over the seven weeks life cyccle of broiler chickens. Second, 60 min after intravenous injection, BQ123 ($0.4{\mu}g\;kg^{-1}$ and $2.0{\mu}g\;kg^{-1}$, respectively) induced a significant reduction in FAP and PAP (p<0.05). Third, chronic infusion of BQ123 ($2.0{\mu}g\;kg^{-1}$ each time, two times a day) into abdominal cavities led to significant decrease in systolic pressure of the femoral (p<0.05) and pulmonary arteries (p<0.01) in broiler chickens at 7 and 14 days after treatment. Taken together, the $ET_AR$ antagonist BQ123 lead to a significant reduction of FAP and PAP, which suggests that endogenous ET-1 may be involved in the maintenance and regulation of systemic and pulmonary pressure in broiler chickens.

키워드

BQ123;Endothelin-1;Femoral Artery Pressure;Pulmonary Artery Pressure;Broiler Chickens

참고문헌

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과제정보

연구 과제 주관 기관 : China Education Ministry