Puerarin alleviates aggravated sympathoexcitatory response induced by myocardial ischemia via regulating P2X3 receptor in rat superior cervical ganglia.

Abstract

Myocardial ischemia elicits a sympathoexcitatory response characterized by increase in blood pressure and sympathetic nerve activity. Puerarin, a major active ingredient extracted from the traditional Chinese plant medicine Ge-gen, has been widely used in treatment of myocardial and cerebral ischemia. However, little is known about the mechanism. Our study was aimed to explore the effect of puerarin on sympathoexcitatory response induced by myocardial ischemic injury and possible relationship with P2X3 receptor. Our results showed that puerarin alleviated systolic blood pressure and heart rate, and decreased the up-regulated of P2X3 mRNA and protein in SCG of myocardial ischemic rats. The amplitude of ATP-activated currents of SCG neurons was much larger in myocardial ischemic group than that in control group. Puerarin reduced ATP-activated currents in myocardial ischemic group and control group, and the inhibiting effects of puerarin in myocardial ischemic group were stronger than those in control group. Puerarin also significantly inhibited ATP-activated currents in HEK293 cells transfected with P2X3 receptor. These results suggest that puerarin can depress up-sympathoexcitatory response induced by myocardial ischemia via acting on P2X3 receptor in rat SCG to protect myocardium.

• Authors: Shuangmei Liu, Shicheng Yu, Changshui Xu, Lichao Peng, Hong Xu, Chunping Zhang, Guilin Li, Yun Gao, Bo Fan, Qicheng Zhu, Chaoran Zheng, Bing Wu, Miaomiao Song, Qin Wu, Shangdong Liang
• Journal: Neurochemistry international (Neurochem Int) Vol. 70 Pg. 39-49 (May 2014) ISSN: 1872-9754 [Electronic] England
• PMID: 24657446 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2014 Elsevier Ltd. All rights reserved.

Chemical References

• Isoflavones
• Receptors, Purinergic P2X3
• Vasodilator Agents
• puerarin

Topics

• Animals
• Blood Pressure (drug effects)
• Cells, Cultured
• Humans
• Isoflavones (pharmacology)
• Myocardial Ischemia (drug therapy, metabolism)
• Neurons (metabolism)
• Rats, Sprague-Dawley
• Receptors, Purinergic P2X3 (metabolism)
• Signal Transduction (drug effects)
• Superior Cervical Ganglion (drug effects, metabolism)
• Sympathetic Nervous System (metabolism)
• Vasodilator Agents (pharmacology)