| LONG-TERM INHIBITION OF Na~ /H~ EXCHANGE ATTENUATES CARDIAC REMODELING AFTER MYOCARDIAL INFARCTION IN RATS |
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| 作者姓名： | XIA Qin-gui\ *L Oliver Chung Heidi Spitznagel Thomas Unger |
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| 作者单位： | Institute of Pharmacology，Christian-Albrechts-University of Kiel，Hospitalstrasse 4，24105 Kiel，Germany |
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| 摘 要： | ＩＮＴＲＯＤＵＣＴＩＯＮＴｈｅＮａ /Ｈ ｅｘｃｈａｎｇｅｒ (ＮＨＥ)ｉｓａｐＨ ｒｅｇｕｌａｔｏｒｙｐｒｏｔｅｉｎｐｒｅｓｅｎｔｉｎｔｈｅｐｌａｓｍａｍｅｍ ｂｒａｎｃｅｏｆｃａｒｄｉｏｍｙｏｃｙｔｅｓａｎｄｏｔｈｅｒｃｅｌｌｔｙｐｅｓ.ＡｌｔｈｏｕｇｈｓｅｖｅｒａｌｉｓｏｆｏｒｍｓｏｆＮＨＥｈａｖｅｂｅｅｎｄｅ ｃｒｉｂｅｄ,ｔｈｅｐｒｅｄｏｍｉｎａｎｔｉｓｏｆｏｒｍｉｎｔｈｅｈｅａｒｔｉｓｔｈｅｕｂｉｑｕｉｔｏｕｓＮＨＥ 1 ,ｗｈｉｃｈｕｎｄｅｒｃｅｎｔａｉｎｐｈｙｓｉｏｌｏｇｉｃａｌｃｏｎｄｉｔｉ…
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LONG-TERM INHIBITION OF Na~ /H~ EXCHANGE ATTENUATES CARDIAC REMODELING AFTER MYOCARDIAL INFARCTION IN RATS |
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| XIA Qin-gui\ *L,Oliver Chung,Heidi Spitznagel,Thomas Unger.LONG-TERM INHIBITION OF Na~ /H~ EXCHANGE ATTENUATES CARDIAC REMODELING AFTER MYOCARDIAL INFARCTION IN RATS[J].Journal of Zhejiang University Science,2001(4). |
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| Authors: | XIA Qin-gui\ L Oliver Chung Heidi Spitznagel Thomas Unger |
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| Institution: | XIA Qin-gui\ *L,Oliver Chung,Heidi Spitznagel,Thomas Unger |
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| Abstract: | Objective: In addition to pH regulation, Na\ /H\ exchanger (NHE) has been shown to facilitate cell growth and proliferation. However, the effects of long-term inhibition of Na\ /H\ exchange on cardiac structural and functional remodeling post myocardial infarction (MI) are still controversial. The present study was therefore carried out to further investigate the effects of long-term treatment with cariporide, a specific inhibitor of NHE-1, on cardiac remodeling after MI in rats; Methods: Male Wistar rats that underwent coronary ligation were randomly selected for cariporide treatment starting 6 h after induction of MI or no treatment.Treatment was continued up to 6 weeks post MI, after which, the arterial, venous and left ventricular catheters were chronically implanted. Twenty-four h later, after hemodynamic signals were recorded in conscious rats, they were sacrificed and hearts were taken out for morphological examinations; Results: Cariporide treatment decreased the heart weight and heart weight to body weight ratio (both \%P\%<0.05), decreased left ventricular end-diastolic pressure (\%P\%<0.001), improved myocardial contractility (d\%P\%/d\%t\%\-\{max\}) (\%P\%<0.05) and tended to increase the survival of treated rats compared to that of untreated infarct rats; Conclusion: The results of the present study indicate that the long-term inhibition of NHE with cariporide can attenuate cardiac structural remodeling and improve left ventricular dysfunction in infarcted rats, and suggest that Na\ /H\ exchange inhibition could be an effective therapeutic strategy for myocardial infarction-induced heart failure. |
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| Keywords: | myocardial infarction Na\ /H\ exchange inhibitor remodeling ventricular function |
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