alexa The involvement of AQP1 in heart oedema induced by global myocardial ischemia.
Pharmaceutical Sciences

Pharmaceutical Sciences

Biochemistry & Pharmacology: Open Access

Author(s): Ding FB, Yan YM, Huang JB, Mei J, Zhu JQ,

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Abstract Aquaporin-1 (AQP1) is a member of aquaporin family that was previously proven to be involved in myocardial dysfunction; however, the role of AQP1 in myocardial stunning is less clear. To determine the change of AQP1 expression level in the heart and its effect on oedema after global myocardial ischemia, 40 adult goats underwent cardiopulmonary bypass (CPB) with an aortic cross-clamp time of 2 h and total bypass time of 6, 12, 24, 48 and 72 h followed by subsequent reperfusion. AQP1 function of eight goats was inhibited by HgCl(2) during the 24 h on CPB. All groups were compared with eight sham bypass control goats. Myocardial water content was measured, and the APQ1 mRNA and protein levels were detected by RT-PCR and immunoblotting, respectively. The results showed that the degree of myocardial oedema increased significantly at 6, 12, 24 and 48 h of reperfusion after CPB as compared with the control and recovered at 72 h of subsequent reperfusion. Expression levels of AQP1 mRNA and protein began to increase at 12 h and peaked at 24 h of CPB following reperfusion. Furthermore, myocardial oedema was reduced in the HgCl(2) group compared with the time-matched CPB and control groups. These data suggested that AQP1 expression increases in CPB and AQP1 plays an important role in myocardial oedema during CPB. Copyright © 2012 John Wiley & Sons, Ltd. This article was published in Cell Biochem Funct and referenced in Biochemistry & Pharmacology: Open Access

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