Effects of Rho-kinase inhibitor on vasopressin-induced chronic myocardial damage in rats
| Autor: | T. Asano, Shin ichi Satoh, Hiroaki Shimokawa, Yoshinori Toshima, Atsushi Watanabe, Ichiro Ikegaki |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Male
Vasopressin medicine.medical_specialty Arginine Vasopressins Protein Serine-Threonine Kinases General Biochemistry Genetics and Molecular Biology Angina Electrocardiography Fibrosis 1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine Internal medicine medicine Animals Enzyme Inhibitors General Pharmacology Toxicology and Pharmaceutics Depression (differential diagnoses) rho-Associated Kinases business.industry Intracellular Signaling Peptides and Proteins Fasudil General Medicine medicine.disease Rats Disease Models Animal Kinetics Endocrinology Rho kinase inhibitor Chronic Disease Disease Progression Myocardial fibrosis Cardiomyopathies business |
| Zdroj: | Life Sciences. 72:103-112 |
| ISSN: | 0024-3205 |
| DOI: | 10.1016/s0024-3205(02)02178-1 |
| Popis: | The aim of this study was to develop a new model of vasopressin-induced chronic myocardial damage based on sustained ST-segment depression in electrocardiogram (ECG) with progression of myocardial fibrosis in rats. Furthermore, using this model, we examined the prophylactic potential of fasudil, a Rho-kinase inhibitor, against myocardial damage induced by vasopressin. In 10-week old male Donryu rats, intravenous administration of arginine vasopressin (0.5 iu/kg) induced significant ST-segment depression. Two days and one week after the administration of vasopressin, ST-segment depression was -0.19 +/- 0.02 and -0.14 +/- 0.02 mV, respectively. Fasudil (10 and 30 mg/kg, p.o.) significantly attenuated the ST-segment depression induced by vasopressin. One week after the administration of vasopressin, the percent area of myocardial fibrosis in control animals (0.42 +/- 0.11%, p0.01) was significantly greater than that in normal animals (0.05 +/- 0.01%). Fasudil (10 and 30 mg/kg) significantly prevented the development of the fibrosis. We present a new model of chronic myocardial damage based on sustained ST-segment depression with progression of myocardial fibrosis in rats, and suggest that this model may be useful to investigate the treatment of chronic angina. Inhibition of Rho-kinase is efficacious in preventing the ECG change and development of fibrosis induced by vasopressin in this model. |
| Databáze: | OpenAIRE |
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