Abstract | BACKGROUND: METHODS: MI was induced by ligation of the coronary artery. The rats in the carvedilol group received 5.0mg/kg carvedilol twice a day. Eight weeks after MI, monophasic action potential duration (MAPD), effective refractory period (ERP) and the inducibility of ventricular arrhythmia at the peri- infarct zones were evaluated and compared with MI rats. After these studies, the expression of growth associated protein 43 (GAP43) and tyrosinehydroxylase (TH) at the peri- infarct zones were examined by western blot and RT-PCR analysis. RESULTS: Eight weeks after surgery, carvedilol shortened the duration of the MAPD determined as 20% (MAPD(20)) and 90% (MAPD(90)) repolarization time (33 ± 9 ms and 110 ± 18 ms vs 21 ± 6 ms and 76 ± 13 ms, both P<0.05) and ERP (76 ± 15 ms vs 62 ± 12 ms, P<0.05), respectively. Carvedilol decreased the inducibility of ventricular arrhythmia after MI (76% vs 32%, P<0.05). The expression of GAP43 and TH were suppressed by carvedilol after MI. CONCLUSION:
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Authors | Huazhi Wen, Hong Jiang, Zhibing Lu, Xiaorong Hu, Bo He, Qizhu Tang, Congxin Huang |
Journal | Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie
(Biomed Pharmacother)
Vol. 64
Issue 7
Pg. 446-50
(Sep 2010)
ISSN: 1950-6007 [Electronic] France |
PMID | 20359859
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | 2010 Elsevier Masson SAS. All rights reserved. |
Chemical References |
- Adrenergic beta-Antagonists
- Carbazoles
- GAP-43 Protein
- Propanolamines
- RNA, Messenger
- Carvedilol
- Tyrosine 3-Monooxygenase
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Topics |
- Action Potentials
- Adrenergic beta-Antagonists
(pharmacology)
- Animals
- Arrhythmias, Cardiac
(metabolism, physiopathology)
- Autonomic Pathways
(metabolism, physiopathology)
- Carbazoles
(pharmacology)
- Carvedilol
- GAP-43 Protein
(metabolism)
- Heart
(innervation, physiopathology)
- Male
- Myocardial Infarction
(drug therapy, metabolism, physiopathology)
- Propanolamines
(pharmacology)
- RNA, Messenger
(metabolism)
- Random Allocation
- Rats
- Rats, Wistar
- Sympathetic Nervous System
(drug effects, physiopathology)
- Tyrosine 3-Monooxygenase
(metabolism)
- Ventricular Remodeling
(drug effects)
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