ArticleExperimental & molecular medicine2012
Dendroaspis natriuretic peptide regulates the cardiac L-type Ca2+ channel activity by the phosphorylation of α1c proteins.
Article in Experimental & molecular medicine, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 16 citations in OpenAlex.
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Authors and funding
6 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
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(2+) channels in rabbit ventricular myocytes. DNP inhibited the L-type Ca(2+) current (I(Ca,L)) in a concentration dependent manner with a IC(50) 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(Ca,L). The α(1c) subunit of cardiac L-type Ca(2+) 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(2+) channel activity by phosphorylating the Ca(2+) channel protein via PKG activation.
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