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rdf:type |
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lifeskim:mentions |
umls-concept:C0013117,
umls-concept:C0017337,
umls-concept:C0018787,
umls-concept:C0040649,
umls-concept:C0040715,
umls-concept:C0248868,
umls-concept:C0596235,
umls-concept:C0599718,
umls-concept:C0599813,
umls-concept:C0599893,
umls-concept:C0963772,
umls-concept:C1413057,
umls-concept:C1522702,
umls-concept:C1711351,
umls-concept:C1825644
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pubmed:issue |
Pt 11
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pubmed:dateCreated |
2011-6-2
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pubmed:abstractText |
Recent studies have demonstrated that changes in the activity of calcium-calmodulin-dependent protein kinase II (CaMKII) induce a unique cardiomyocyte phenotype through the regulation of specific genes involved in excitation-contraction (E-C)-coupling. To explain the transcriptional effects of CaMKII we identified a novel CaMKII-dependent pathway for controlling the expression of the pore-forming ?-subunit (Cav1.2) of the L-type calcium channel (LTCC) in cardiac myocytes. We show that overexpression of either cytosolic (?C) or nuclear (?B) CaMKII isoforms selectively downregulate the expression of the Cav1.2. Pharmacological inhibition of CaMKII activity induced measurable changes in LTCC current density and subsequent changes in cardiomyocyte calcium signalling in less than 24 h. The effect of CaMKII on the ?1C-subunit gene (Cacna1c) promoter was abolished by deletion of the downstream regulatory element (DRE), which binds transcriptional repressor DREAM/calsenilin/KChIP3. Imaging DREAM-GFP (green fluorescent protein)-expressing cardiomyocytes showed that CaMKII potentiates the calcium-induced nuclear translocation of DREAM. Thereby CaMKII increases DREAM binding to the DRE consensus sequence of the endogenous Cacna1c gene. By mathematical modelling we demonstrate that the LTCC downregulation through the Ca2+-CaMKII-DREAM cascade constitutes a physiological feedback mechanism enabling cardiomyocytes to adjust the calcium intrusion through LTCCs to the amount of intracellular calcium detected by CaMKII.
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Benzylamines,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium Channels, L-Type,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium-Calmodulin-Dependent...,
http://linkedlifedata.com/resource/pubmed/chemical/Csen protein, mouse,
http://linkedlifedata.com/resource/pubmed/chemical/Csen protein, rat,
http://linkedlifedata.com/resource/pubmed/chemical/DNA,
http://linkedlifedata.com/resource/pubmed/chemical/KN 93,
http://linkedlifedata.com/resource/pubmed/chemical/Kv Channel-Interacting Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/L-type calcium channel alpha(1C),
http://linkedlifedata.com/resource/pubmed/chemical/Natriuretic Peptide, Brain,
http://linkedlifedata.com/resource/pubmed/chemical/Repressor Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Sulfonamides
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pubmed:status |
MEDLINE
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pubmed:month |
Jun
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pubmed:issn |
1469-7793
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pubmed:author |
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pubmed:issnType |
Electronic
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pubmed:day |
1
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pubmed:volume |
589
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
2669-86
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pubmed:meshHeading |
pubmed-meshheading:21486818-Active Transport, Cell Nucleus,
pubmed-meshheading:21486818-Animals,
pubmed-meshheading:21486818-Animals, Newborn,
pubmed-meshheading:21486818-Benzylamines,
pubmed-meshheading:21486818-Binding Sites,
pubmed-meshheading:21486818-Calcium Channels, L-Type,
pubmed-meshheading:21486818-Calcium-Calmodulin-Dependent Protein Kinase Type 2,
pubmed-meshheading:21486818-Cell Line,
pubmed-meshheading:21486818-Cell Line, Tumor,
pubmed-meshheading:21486818-Cells, Cultured,
pubmed-meshheading:21486818-DNA,
pubmed-meshheading:21486818-Down-Regulation,
pubmed-meshheading:21486818-Electrophysiological Phenomena,
pubmed-meshheading:21486818-Excitation Contraction Coupling,
pubmed-meshheading:21486818-Feedback, Physiological,
pubmed-meshheading:21486818-Gene Expression,
pubmed-meshheading:21486818-Gene Expression Regulation,
pubmed-meshheading:21486818-Kv Channel-Interacting Proteins,
pubmed-meshheading:21486818-Mice,
pubmed-meshheading:21486818-Models, Biological,
pubmed-meshheading:21486818-Myocytes, Cardiac,
pubmed-meshheading:21486818-Natriuretic Peptide, Brain,
pubmed-meshheading:21486818-Patch-Clamp Techniques,
pubmed-meshheading:21486818-Point Mutation,
pubmed-meshheading:21486818-Promoter Regions, Genetic,
pubmed-meshheading:21486818-Rats,
pubmed-meshheading:21486818-Rats, Inbred Strains,
pubmed-meshheading:21486818-Repressor Proteins,
pubmed-meshheading:21486818-Sequence Deletion,
pubmed-meshheading:21486818-Sulfonamides,
pubmed-meshheading:21486818-Transfection,
pubmed-meshheading:21486818-Up-Regulation
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pubmed:year |
2011
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pubmed:articleTitle |
Ca2+-calmodulin-dependent protein kinase II represses cardiac transcription of the L-type calcium channel alpha(1C)-subunit gene (Cacna1c) by DREAM translocation.
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pubmed:affiliation |
Department of Biotechnology and Molecular Medicine, A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, PO Box 1627, Neulaniementie 2, FI-70211 Kuopio, Finland.
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pubmed:publicationType |
Journal Article
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