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

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          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.

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          Author and article information

          Journal
          Neurochem. Int.
          Neurochemistry international
          Elsevier BV
          1872-9754
          0197-0186
          May 2014
          : 70
          Affiliations
          [1 ] Department of Physiology, Medical School of Nanchang University, Nanchang 330006, PR China.
          [2 ] Department of Physiology, Medical School of Nanchang University, Nanchang 330006, PR China. Electronic address: liangsd@hotmail.com.
          Article
          S0197-0186(14)00051-5
          10.1016/j.neuint.2014.03.004
          24657446
          374118e6-2fa7-4633-9fc3-d1f180eef560
          History

          Puerarin,Superior cervical ganglia,Sympathoexcitatory response,Myocardial ischemia,P2X(3) receptor

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