Effect of carvedilol and perindopril on Ca(2+) pump activity and Ca(2+)-release channel density in myocardial sarcoplasmic reticulum in rats with chronic heart failure following myocardial infarction / 南方医科大学学报
Journal of Southern Medical University
; (12): 1461-1464, 2009.
Article
en Zh
| WPRIM
| ID: wpr-282670
Biblioteca responsable:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To study the effects of carvedilol combined with perindopril on Ca(2+) pump activity and the density of Ca(2+)-release channel ryanodine receptor (RyR2) in the myocardial sarcoplasmic reticulum (SR) in rats with chronic heart failure caused by myocardial infarction.</p><p><b>METHODS</b>Rat models of chronic heart failure established by left coronary artery ligation were divided into different groups and treated with carvedilol (6 mg.kg(-1).d(-1)), perindopril (4 mg.kg(-1).d(-1)), terazosin (2 mg.kg(-1).d(-1)), or the combination of carvedilol (6 mg.kg(-1).d(-1)) and perindopril (4 mg.kg(-1).d(-1)) for 9 weeks. Another 12 rats with sham operation served as the sham-operated group. The hemodynamic parameters, activity of SR Ca(2+) pump, and RyR2 density were determined.</p><p><b>RESULTS</b>Compared with shame-operated group, the rats with chronic heart failure showed significantly increased left ventricular end-diastolic pressure (LVEDP) (P<0.01) and decreased +dP/dtmax, -dp/dtmax, activity of SR Ca(2+) pump and density of RyR2 (P<0.01). Both monotherapies with carvedilol and perindopril attenuated the increment of LVEDP, and significantly increased +dp/dtmax, -dp/dtmax, activity of SR Ca(2+) pump and density of RyR2 (P<0.01). Combined treatment even further enhanced the therapeutic effects, whereas terazosin produced no obvious effect. The activity of SR Ca(2+) pump was strongly correlated to +dp/dtmax and -dp/dtmax (r=0.596 and 0.684, respectively, P<0.01).</p><p><b>CONCLUSION</b>Prolonged treatment with beta-blocker carvedilol in combination with ACE inhibitor perindopril may improve the hemodynamic parameters, enhance Ca(2+) pump activity and increase the density of RyR2 of myocardial SR more effectively than either monotherapy in preventing and treating chronic heart failure following myocardial infarction.</p>
Texto completo:
1
Índice:
WPRIM
Asunto principal:
Farmacología
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Propanolaminas
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Retículo Sarcoplasmático
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Carbazoles
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Calcio
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Ratas Wistar
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Canal Liberador de Calcio Receptor de Rianodina
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Perindopril
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Usos Terapéuticos
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Quimioterapia
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
Zh
Revista:
Journal of Southern Medical University
Año:
2009
Tipo del documento:
Article