Dendroaspis natriuretic peptide regulates the cardiac l-type ca channel activity by the phosphorylation of α proteins
Experimental and Molecular Medicine, ISSN: 2092-6413, Vol: 44, Issue: 6, Page: 363-368
2012
- 15Citations
- 16Captures
- 1Mentions
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Metrics Details
- Citations15
- Citation Indexes15
- 15
- CrossRef11
- Captures16
- Readers16
- 16
- Mentions1
- References1
- Wikipedia1
Article Description
Dendroaspis natriuretic peptide (DNP), a new member of the natriuretic peptide family, is structurally similar to atrial, brain, and C-type natriuretic peptides. However, the effects of DNP on the cardiac function are poorly defined. In the present study, we examined the effect of DNP on the cardiac L-type Ca channels in rabbit ventricular myocytes. DNP inhibited the L-type Ca current (I) in a concentration dependent manner with a IC of 25.5 nM, which was blocked by an inhibitor of protein kinase G (PKG), KT5823 (1 μM). DNP did not affect the voltage dependence of activation and inactivation of I. The α1c subunit of cardiac L-type Ca channel proteins was phosphorylated by the treatment of DNP (1 μM), which was completely blocked by KT5823 (1 μM). Finally, DNP also caused the shortening of action potential duration in rabbit ventricular tissue by 22.3 ± 4.2% of the control (n = 6), which was completely blocked by KT5823 (1 μM). These results clearly indicate that DNP inhibits the L-type Ca channel activity by phosphorylating the Ca channel protein via PKG activation. © 2012 by the Korean Society for Biochemistry and Molecular Biology.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84863446601&origin=inward; http://dx.doi.org/10.3858/emm.2012.44.6.041; http://www.ncbi.nlm.nih.gov/pubmed/22366884; https://www.nature.com/doifinder/10.3858/emm.2012.44.6.041; https://dx.doi.org/10.3858/emm.2012.44.6.041; https://www.nature.com/articles/emm201241
Springer Science and Business Media LLC
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