Role of Ca2+/calmodulin-dependent calcineurin signaling pathway in neuropeptide Y-induced cardiac hypertrophy in rats / 南方医科大学学报
Journal of Southern Medical University
; (12): 2139-2141, 2008.
Article
在 Zh
| WPRIM
| ID: wpr-321746
Responsible library:
WPRO
ABSTRACT
<p><b>OBJECTIVE</b>To investigate the role of Ca(2+)/calmodulin-dependent calcineurin (CaN) signaling pathway in neuropeptide Y (NPY)-induced cardiomyocyte hypertrophy in rat.</p><p><b>METHODS</b>Cardiomyocytes of neonatal Wistar rats were cultured in the presence of 10 and 100 nmol/L NPY, and cyclosporine A (CsA) was applied to inhibit the activity of CaN. The protein synthesis rate, c-jun mRNA expression, CaN protein expression, CaN activity and intracellular Ca(2+) concentration in the cardiomyocytes were assessed.</p><p><b>RESULTS</b>Compared with the control group, (3)H-Leu incorporation and expression of c-jun mRNA in the cardiomyocytes treated with 100 nmol/L NPY increased significantly (P<0.05, P<0.001), and the effect of NPY was blocked by CsA. The activity of CaN (P<0.05), CaN expression (P<0.05), and Ca(2+) concentration in the cytoplasm (P<0.001) and nuclei (P<0.001) of the cells with 100 nmol/L NPY treatment also significantly increased compared with those in the control cells.</p><p><b>CONCLUSION</b>NPY can induce cardiomyocyte hypertrophy in rats, in which process Ca(2+)/calmodulin-dependent CaN signaling pathway plays an important role.</p>
全文:
1
索引:
WPRIM
主要主题:
Pathology
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Pharmacology
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Neuropeptide Y
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RNA, Messenger
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Signal Transduction
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Cells, Cultured
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Proto-Oncogene Proteins c-jun
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Rats, Wistar
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Calcineurin
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Myocytes, Cardiac
限制:
Animals
语言:
Zh
期刊:
Journal of Southern Medical University
年:
2008
类型:
Article