Adenosine A1 receptor activation reduces reactive oxygen species and attenuates stunning in ventricular myocytes.
Adenosine A1 receptor activation reduces reactive oxygen species and attenuates stunning in ventricular myocytes.
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腺苷 A1 受体激活可减少活性氧并减弱心室肌细胞的击晕作用。
DOI:
10.1006/jmcc.2000.1282
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发表时间:
2001
影响因子:
5
通讯作者:
Lasley,RD
中科院分区:
文献类型:
--
作者:
Narayan,P;MentzerJr,RM;Lasley,RD
Reactive oxygen species (ROS) formation following brief periods of ischemia or hypoxia is thought to be the underlying cause of myocardial stunning. Adenosine A1receptor activation prior to ischemia/hypoxia attenuates stunning, although the mechanism for this effect remains unknown. Isolated rat ventricular myocytes loaded with the ROS-sensitive indicator dichlorofluorescin were subjected to 30 min glucose-free hypoxia followed by reoxygenation. Intracellular ROS increased 175% (from pre-hypoxic levels) during reoxygenation while cell shortening decreased 50%. In myocytes pretreated with the adenosine A1agonist 2-chloro- N6-cyclopentlyadenosine (CCPA), reoxygenation-induced ROS formation was attenuated by 40% and stunning was attenuated by 50% (compared to untreated myocytes). The mitochondrial KATPchannel opener diazoxide mimicked the effects of CCPA. Pretreatment with the mitochondrial KATPchannel blocker 5-hydroxydecanoate, or the non-selective KATPchannel blocker glibenclamide, blocked the effects of CCPA. These results suggest that adenosine A1receptor activation attenuates stunning by reducing ROS formation. These effects of A1receptor activation appear to be dependent on the opening of KATPchannels.
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影响因子:
--
作者:
AUCHAMPACH, JA;GROSS, GJ
通讯作者:
GROSS, GJ
影响因子:
5
作者:
VandenHoek, TL;Li, CQ;Becker, LB
通讯作者:
Becker, LB
DOI:
--
发表时间:
1997
期刊:
Biochimica et Biophysica Acta
影响因子:
--
作者:
O. Pisarenko;O. Tskitishvily;I. Studneva;L. Serebryakova;A. Timoshin;E. Ruuge
通讯作者:
E. Ruuge
影响因子:
5
作者:
T. Notsu;Kiyokazu Ohhashi;I. Tanaka;Hiroshi Ishikawa;T. Niho;K. Fukutake;M. Mizota
通讯作者:
M. Mizota
DOI:
10.1152/ajpheart.1997.272.1.h325
发表时间:
1997
期刊:
The American journal of physiology
影响因子:
--
作者:
E. Kim;J. Han;W. Ho;Y. Earm
通讯作者:
Y. Earm