A non-cardiomyocyte autonomous mechanism of cardioprotection involving the SLO1 BK channel.

A non-cardiomyocyte autonomous mechanism of cardioprotection involving the SLO1 BK channel.
复制标题

DOI:
10.7717/peerj.48
复制
发表时间:
2013
期刊:
影响因子:
2.7
通讯作者:
Brookes PS
Brookes PS
中科院分区:
生物学3区
文献类型:
--
作者:
Wojtovich AP;Nadtochiy SM;Urciuoli WR;Smith CO;Grunnet M;Nehrke K;Brookes PS

文献摘要

参考文献

被引文献

相似文献

BK 型 Ca2+ 激活的 K+ 通道的开放可保护心脏免受缺血再灌注 (IR) 损伤。然而,负责心脏保护的 BK 通道的位置存在争议。在此,我们证实 SLO1 BK 通道的开放剂 NS1619 和 NS11021 在小鼠灌注心脏 IR 损伤模型中具有保护作用。正如预期的那样,Slo1 基因的删除阻断了这种保护。然而,在 IR 损伤的分离心肌细胞模型中,NS1619 和 NS11021 的保护对 Slo1 缺失不敏感。这些数据表明,完整心脏的保护是通过非心肌细胞自主、SLO1 依赖性机制发生的。在这方面,对内在心脏神经元功能(对尼古丁的心动过速反应)的原位测定表明,NS1619 在 IR 损伤后保留了心脏神经元。此外,六甲铵对突触传递的阻断抑制了 NS1619 在完整心脏中的心脏保护作用。这些结果表明,打开 SLO1 可通过涉及内在心脏神经元的机制在 IR 损伤期间保护心脏。心脏神经元离子通道可能是引发心脏保护作用的有用治疗靶点。
Opening of BK-type Ca2+ activated K+ channels protects the heart against ischemia-reperfusion (IR) injury. However, the location of BK channels responsible for cardioprotection is debated. Herein we confirmed that openers of the SLO1 BK channel, NS1619 and NS11021, were protective in a mouse perfused heart model of IR injury. As anticipated, deletion of the Slo1 gene blocked this protection. However, in an isolated cardiomyocyte model of IR injury, protection by NS1619 and NS11021 was insensitive to Slo1 deletion. These data suggest that protection in intact hearts occurs by a non-cardiomyocyte autonomous, SLO1-dependent, mechanism. In this regard, an in-situ assay of intrinsic cardiac neuronal function (tachycardic response to nicotine) revealed that NS1619 preserved cardiac neurons following IR injury. Furthermore, blockade of synaptic transmission by hexamethonium suppressed cardioprotection by NS1619 in intact hearts. These results suggest that opening SLO1 protects the heart during IR injury, via a mechanism that involves intrinsic cardiac neurons. Cardiac neuronal ion channels may be useful therapeutic targets for eliciting cardioprotection.
DOI: 10.1016/s0006-2952(03)00180-1
发表时间: 2003-06-01
影响因子: 5.8
作者:
Debska, G;Kicinska, A;Szewczyk, A
通讯作者: Szewczyk, A
DOI: 10.1124/jpet.104.074476
发表时间: 2005-02-01
影响因子: 3.5
作者:
Cao, CM;Xia, Q;Wong, TM
通讯作者: Wong, TM
DOI: 10.1152/ajpcell.00215.2006
发表时间: 2007-01-01
影响因子: 5.5
作者:
Heinen, Andre;Camara, Amadou K. S.;Stowe, David F.
通讯作者: Stowe, David F.
DOI: 10.1152/ajpcell.00468.2009
发表时间: 2010-03-01
影响因子: 5.5
作者:
Aldakkak, Mohammed;Stowe, David F.;Camara, Amadou K. S.
通讯作者: Camara, Amadou K. S.
DOI: 10.1074/jbc.m413955200
发表时间: 2005-06-03
影响因子: 4.8
作者:
Chen, LN;Cagniard, B;Zhuang, XX
通讯作者: Zhuang, XX