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Mechanosensitive nonselective cation channel facilitation by endothelin-1 is regulated by protein kinase C in arterial myocytes
DC Field | Value | Language |
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dc.contributor.author | Lee, Hyang Ae | - |
dc.contributor.author | Baek, Eun Bok | - |
dc.contributor.author | Park, Kyung Sun | - |
dc.contributor.author | Jung, Hoi Jong | - |
dc.contributor.author | Kim, Jae Il | - |
dc.contributor.author | Kim, Sung Joon | - |
dc.contributor.author | Earm, Yung E | - |
dc.date.accessioned | 2010-07-07T23:45:15Z | - |
dc.date.available | 2010-07-07T23:45:15Z | - |
dc.date.issued | 2007-07-31 | - |
dc.identifier.citation | Cardiovasc Res. 2007;76(2):224-235 | en |
dc.identifier.issn | 0008-6363 (Print) | - |
dc.identifier.uri | http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=17658500 | - |
dc.identifier.uri | https://hdl.handle.net/10371/68478 | - |
dc.description.abstract | OBJECTIVE: The mechanosensitive nonselective cation channel (NSC(MS)) and endothelin-1 (ET-1) play critical roles in the regulation of vascular tone. This study was undertaken to investigate the effect of ET-1 on NSC(MS) and on the myogenic response of arteries. METHODS: Cell-attached patch-clamp techniques were applied to rabbit pulmonary and cerebral arterial smooth muscle cells using a 140 mM CsCl pipette and bath solutions (Ca(2+)-free, 1 mM EGTA). Myogenic responses were determined by video analysis of pressurized arteries. RESULTS: The application of negative pressures through the pipette activated NSC(MS), and this was augmented by bath application of ET-1 (1 pM-30 nM). ET-1 lowered the lowest pressure required for NSC(MS) activation. NSC(MS) facilitation by ET-1 was prevented by BQ-123 (1 microM, an ET(A) antagonist) but not by BQ-788 (1 microM, an ET(B) antagonist). Phorbol 12-myristate 13-acetate (PMA, 100 nM), a protein kinase C activator, also increased the activity of NSC(MS). ET-1- or PMA-induced facilitation of NSC(MS) was abolished by GF109203X (10 microM), a protein kinase C inhibitor. Video analysis of pressurized cerebral artery showed inhibition of the myogenic response by the NSC(MS) channel blockers GsMTx-4 (5 microM) and DIDS (3-100 microM). Treatment with ET-1 (10 pM) augmented the myogenic response and this was inhibited by DIDS (30 microM). CONCLUSION: Stimulation of ET-1 receptor (ET(A)) facilitates NSC(MS) via a protein kinase C-dependent signaling pathway in rabbit arterial myocytes. Our findings suggest that NSC(MS) play a role in the myogenic response and its augmentation by ET-1. | en |
dc.description.sponsorship | This work was supported by the Korea Research Foundation
funded by theKoreanGovernment (MOEHRD, Basic Research Promotion Fund, KRF-2006-E00021). | en |
dc.language.iso | en | en |
dc.publisher | Elsevier | en |
dc.subject | Animals | en |
dc.subject | Calcium/metabolism | en |
dc.subject | Endothelin-1/*pharmacology | en |
dc.subject | Female | en |
dc.subject | Humans | en |
dc.subject | Male | en |
dc.subject | Muscle, Smooth, Vascular/cytology/*drug effects/physiology | en |
dc.subject | Myocytes, Smooth Muscle/*drug effects/physiology | en |
dc.subject | Peptides/pharmacology | en |
dc.subject | Protein Kinase C/*physiology | en |
dc.subject | Pulmonary Artery/cytology/drug effects/physiology | en |
dc.subject | Rabbits | en |
dc.subject | Spider Venoms/pharmacology | en |
dc.subject | Stress, Mechanical | en |
dc.subject | TRPC Cation Channels/drug effects/physiology | en |
dc.subject | TRPM Cation Channels/drug effects/physiology | en |
dc.subject | Transient Receptor Potential Channels/*drug effects/physiology | en |
dc.title | Mechanosensitive nonselective cation channel facilitation by endothelin-1 is regulated by protein kinase C in arterial myocytes | en |
dc.type | Article | en |
dc.contributor.AlternativeAuthor | 이향애 | - |
dc.contributor.AlternativeAuthor | 백은복 | - |
dc.contributor.AlternativeAuthor | 박경선 | - |
dc.contributor.AlternativeAuthor | 정회종 | - |
dc.contributor.AlternativeAuthor | 김재일 | - |
dc.contributor.AlternativeAuthor | 김성준 | - |
dc.contributor.AlternativeAuthor | 엄융의 | - |
dc.identifier.doi | 10.1016/j.cardiores.2007.06.021 | - |
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