http://purl.uniprot.org/citations/19745168 | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://purl.uniprot.org/core/Journal_Citation |
http://purl.uniprot.org/citations/19745168 | http://www.w3.org/1999/02/22-rdf-syntax-ns#type | http://purl.uniprot.org/core/Journal_Citation |
http://purl.uniprot.org/citations/19745168 | http://www.w3.org/2000/01/rdf-schema#comment | "RationaleMutations in glycerol-3-phosphate dehydrogenase 1-like (GPD1-L) protein reduce cardiac Na+ current (I(Na)) and cause Brugada Syndrome (BrS). GPD1-L has >80% amino acid homology with glycerol-3-phosphate dehydrogenase, which is involved in NAD-dependent energy metabolism.ObjectiveTherefore, we tested whether NAD(H) could regulate human cardiac sodium channels (Na(v)1.5).Methods and resultsHEK293 cells stably expressing Na(v)1.5 and rat neonatal cardiomyocytes were used. The influence of NADH/NAD+ on arrhythmic risk was evaluated in wild-type or SCN5A(+/-) mouse heart. A280V GPD1-L caused a 2.48+/-0.17-fold increase in intracellular NADH level (P<0.001). NADH application or cotransfection with A280V GPD1-L resulted in decreased I(Na) (0.48+/-0.09 or 0.19+/-0.04 of control group, respectively; P<0.01), which was reversed by NAD+, chelerythrine, or superoxide dismutase. NAD+ antagonism of the Na+ channel downregulation by A280V GPD1-L or NADH was prevented by a protein kinase (PK)A inhibitor, PKAI(6-22). The effects of NADH and NAD+ were mimicked by a phorbol ester and forskolin, respectively. Increasing intracellular NADH was associated with an increased risk of ventricular tachycardia in wild-type mouse hearts. Extracellular application of NAD+ to SCN5A(+/-) mouse hearts ameliorated the risk of ventricular tachycardia.ConclusionsOur results show that Na(v)1.5 is regulated by pyridine nucleotides, suggesting a link between metabolism and I(Na). This effect required protein kinase C activation and was mediated by oxidative stress. NAD+ could prevent this effect by activating PKA. Mutations of GPD1-L may downregulate Na(v)1.5 by altering the oxidized to reduced NAD(H) balance."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.org/dc/terms/identifier | "doi:10.1161/circresaha.109.197277"xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.org/dc/terms/identifier | "doi:10.1161/circresaha.109.197277"xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Liu M."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Liu M."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Zhu X."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Zhu X."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Gao G."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Gao G."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Sanyal S."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Sanyal S."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Grace A."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Grace A."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "London B."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "London B."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Huang C.L."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Huang C.L."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Dudley S.C. Jr."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Dudley S.C. Jr."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Gaconnet G."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Gaconnet G."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Gurung I.S."xsd:string |
http://purl.uniprot.org/citations/19745168 | http://purl.uniprot.org/core/author | "Gurung I.S."xsd:string |