Effects of oxymatrine on sympathoexcitatory reflex induced by myocardial ischemic signaling mediated by P2X3 receptors in rat SCG and DRG

被引：45
|
作者：
Li, Guilin [1 ]
Liu, Shuangmei [1 ]
Yang, Yang [2 ]
Xie, Jinyan [1 ]
Liu, Jun [1 ]
Kong, Fanjun [1 ]
Tu, Guihua [1 ]
Wu, Raoping [1 ]
Li, Guodong [1 ]
Liang, Shangdong [1 ]
机构：
[1] Nanchang Univ, Coll Med, Dept Physiol, Nanchang 330006, Jiangxi, Peoples R China
[2] Nanchang Univ, Coll Med, Dept Clin Med 1, Nanchang 330006, Jiangxi, Peoples R China
来源：
BRAIN RESEARCH BULLETIN | 2011年 / 84卷 / 06期
基金：
中国国家自然科学基金;
关键词：
P2X(3) receptor; Oxymatrine; SCG; DRG; Myocardial ischemic injury; CARDIAC SYMPATHETIC AFFERENTS; P2X(2/3) RECEPTOR; P2; RECEPTORS; ADENOSINE 5'-TRIPHOSPHATE; GANGLION NEURONS; PAIN; ATP; RELEASE; INVOLVEMENT; ACTIVATION;
D O I：
10.1016/j.brainresbull.2011.01.011
中图分类号：
Q189 [神经科学];
学科分类号：
071006 ;
摘要：
Sympathoexcitatory reflex is characterized by an increase in blood pressure and sympathetic nerve activity. P2X(3) receptors in SCG neurons are involved in increasing sympathoexcitatory reflex after myocardial ischemic (MI) injury. The present study is aimed to explore the effects of oxymatrine (Oxy) on the transmission of myocardial ischemic signaling mediated by P2X(3) receptors in rat superior cervical ganglia (SCG) and cervical dorsal root ganglia (DRG) in the sympathoexcitatory reflex after myocardial ischemic injury. In this study, the expression levels of P2X(3) immunoreactivity, mRNA and protein were analyzed in SCG and DRG neurons by immunohistochemistry, in situ hybridization and Western blotting. The results show that the myocardial ischemic injury induce:; the increase of the systolic blood pressure and heart rate and upregulates the expression of P2X(3) receptors in SCG and DRG neurons. Upregulated expression of P2X(3) receptors in SCG and DRG neurons subsequently leads to the aggravated sympathoexcitatory reflex. Oxymatrine reduces the systolic blood pressure and heart rate in myocardial ischemic rats. After myocardial ischemic rats are treated with oxymatrine, the expression levels of P2X(3) immunoreactivity, mRNA and protein are lower than those in myocardial ischemic rats. Oxymatrine may decrease the expression of P2X(3) receptor and depress the aggravated sympathoexcitatory reflex induced by the nociceptive transmission of myocardial ischemic injury via P2X(3) receptors of rat SCG and DRG neurons. (C) 2011 Elsevier Inc. All rights reserved.
引用
收藏
页码：419 / 424
页数：6
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