Abstract | AIM: METHODS: A functional fragment of FRNK cDNA was amplified by reverse transcription-polymerase chain reaction and cloned into the vector pcDNA3.1. Hypertrophy in neonatal rat cardiac myocytes was established with angiotensin-II stimulation. The pcDNA3.1-FRNK or pcDNA3.1 was respectively transfected into cardiomyocytes by Lipofectamine 2000. The surface area and mRNA expression of atrial natriuretic peptide ( ANP) of myocytes were employed to detect cardiac hypertrophy. NF-kappaB p65 protein in nuclear extracts, phosphorylation levels of ERK1/2 (p-ERK1/2) and AKT (p-AKT), as well as total ERK1/2, and AKT in variant treated cardiomyocytes were determined by Western blot. RESULTS: Under the stimulation of angiotensin II, the surface area of myocytes and levels of ANP mRNA were significantly increased. But transient transfection with pcDNA3.1-FRNK in advance may reduce the surface area and expression of ANP mRNA of hypertrophic myocytes. The protein levels of NF-kappaB p65 in nuclear extracts and p-ERK1/2, p-AKT in FRNK treated cardiomyocytes were significantly decreased compared with that in angiotensin-II induced cardiomyocytes, while different treatments had little effect on total ERK1/2 and AKT. CONCLUSION: FRNK may inhibit angiotensin-II-induced cardiomyocyte hypertrophy via decreasing phosphorylation levels at ERK1/2 and AKT, consequently downregulating nuclear translocation of NF-kappaB p65.
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Authors | Jin Qin, Zheng-xiang Liu |
Journal | Acta pharmacologica Sinica
(Acta Pharmacol Sin)
Vol. 27
Issue 9
Pg. 1159-64
(Sep 2006)
ISSN: 1671-4083 [Print] United States |
PMID | 16923336
(Publication Type: Journal Article)
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Chemical References |
- DNA, Complementary
- RNA, Messenger
- Transcription Factor RelA
- Angiotensin II
- Atrial Natriuretic Factor
- FAK-related nonkinase
- Protein-Tyrosine Kinases
- Proto-Oncogene Proteins c-akt
- Mitogen-Activated Protein Kinase 1
- Mitogen-Activated Protein Kinase 3
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Topics |
- Angiotensin II
(pharmacology)
- Animals
- Animals, Newborn
- Atrial Natriuretic Factor
(biosynthesis, genetics)
- Cells, Cultured
- DNA, Complementary
(genetics)
- Hypertrophy
- Mitogen-Activated Protein Kinase 1
(metabolism)
- Mitogen-Activated Protein Kinase 3
(metabolism)
- Myocytes, Cardiac
(metabolism)
- Protein-Tyrosine Kinases
(genetics, metabolism)
- Proto-Oncogene Proteins c-akt
(metabolism)
- RNA, Messenger
(biosynthesis, genetics)
- Rats
- Rats, Sprague-Dawley
- Transcription Factor RelA
(metabolism)
- Transfection
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