Abstract:
:Using the patch-clamp recording technique, we observed that endothelin-1 (ET-1; 0.8-16 nM) enhanced a voltage-activated outward current (Iout) and induced periodic oscillations of inward current in smooth muscle cells isolated from small pulmonary arteries (200-400 microns in diameter). Anion substitution experiments revealed that the ET-1-induced inward current was carried by Cl- ions. Application of bosentan (10 microM; and ETA and ETB receptor antagonist) and FR 139317 (1-10 microM; a selective ETA receptor antagonist) prevented initiation of inward currents or enhancement of Iout by ET-1. The ETB receptor agonist tetra-Ala-endothelin-1 (1-20 nM) failed to evoke these responses. Caffeine (10 mM) induced a single transient inward current and prevented any further activation of inward current, or enhancement of Iout, by subsequent application of 16 nM ET-1, suggesting that these currents were mediated by Ca2+ release from internal stores. Rapid intracellular release of Ca2+ by photolysis of nitr-5 activated an inward Cl- current and increased the magnitude of Iout. These results demonstrate the existence of Ca(2+)-activated Cl- and K+ channels in pulmonary arterial smooth muscle. The physiological role of these channels is at present uncertain, although their activation may be involved in the contractile responses of pulmonary arterial smooth muscle to ET-1.
journal_name
Exp Physioljournal_title
Experimental physiologyauthors
Salter KJ,Turner JL,Albarwani S,Clapp LH,Kozlowski RZdoi
10.1113/expphysiol.1995.sp003889subject
Has Abstractpub_date
1995-09-01 00:00:00pages
815-24issue
5eissn
0958-0670issn
1469-445Xjournal_volume
80pub_type
杂志文章abstract::It is debatable whether differences in mitochondrial function exist across skeletal muscle types and whether mouse skeletal muscle mitochondrial function can serve as a valid model for human skeletal muscle mitochondrial function. The aims of this study were to compare and contrast three different mouse skeletal muscl...
journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2012.070037
更新日期:2013-04-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
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journal_title:Experimental physiology
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journal_title:Experimental physiology
pub_type: 杂志文章
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更新日期:1993-05-01 00:00:00
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更新日期:1992-05-01 00:00:00
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pub_type: 杂志文章,评审
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journal_title:Experimental physiology
pub_type: 杂志文章
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更新日期:1990-07-01 00:00:00
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doi:10.1113/EP089053
更新日期:2020-11-23 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1991.sp003475
更新日期:1991-01-01 00:00:00
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journal_title:Experimental physiology
pub_type: 临床试验,杂志文章
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更新日期:1990-05-01 00:00:00
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更新日期:2005-01-01 00:00:00
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更新日期:2021-01-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章,评审
doi:10.1113/EP086846
更新日期:2018-08-01 00:00:00
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journal_title:Experimental physiology
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1995.sp003879
更新日期:1995-09-01 00:00:00
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pub_type: 杂志文章,评审
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更新日期:2007-03-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
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更新日期:2016-03-01 00:00:00
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pub_type: 杂志文章
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更新日期:2018-05-01 00:00:00
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pub_type: 杂志文章
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pub_type: 杂志文章,随机对照试验
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更新日期:2012-12-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1998.sp004124
更新日期:1998-05-01 00:00:00
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journal_title:Experimental physiology
pub_type: 临床试验,杂志文章
doi:
更新日期:2000-01-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.2006.034868
更新日期:2006-11-01 00:00:00
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journal_title:Experimental physiology
pub_type: 杂志文章
doi:10.1113/expphysiol.1998.sp004151
更新日期:1998-09-01 00:00:00