Effect of Electroacupuncture Stimulation of“Neiguan”(PC 6)on Expression of Alpha-and Beta-subunit Proteins of Voltage-gated Sodium Channels in Rats with Myocardial Ischemia
BIAN Di, CHEN Yi-guo, SUI Yue-jiao, et al. Effect of Electroacupuncture Stimulation of“Neiguan”(PC 6)on Expression of Alpha-and Beta-subunit Proteins of Voltage-gated Sodium Channels in Rats with Myocardial Ischemia[J]. Acupuncture research, 2015, 40(1): 45-49.
BIAN Di, CHEN Yi-guo, SUI Yue-jiao, et al. Effect of Electroacupuncture Stimulation of“Neiguan”(PC 6)on Expression of Alpha-and Beta-subunit Proteins of Voltage-gated Sodium Channels in Rats with Myocardial Ischemia[J]. Acupuncture research, 2015, 40(1): 45-49. DOI: 10.13702/j.1000-0607.2015.01.009.
Objective To observe the effect of electroacupuncture(EA)stimulation of"Neiguan"(PC 6)on expression of sodium(Nav)channelα-subunit 1.5and Navβ-subunitsβ1—β4(the known myocardial sodium channel proteins)in acute myocardial ischemia(AMI)rats so as to explore its mechanisms underlying protection of ischemic myocardium.Methods Sixty SD male rats were randomly divided into normal control
AMI model
Neiguan(PC 6)
Lieque(LU 7)and non-acupoint groups.The AMI model was established by intravenous injection of Isoprenaline(85mg/kg)once daily for 2days.Myocardial Nav1.5and Navβ1
β2
β3
β4protein expression levels were detected by Western blot.Results In comparison with the control group
myocardial Nav 1.5
β1
β2
β3andβ4protein expression levels were significantly down-regulated in the AMI model group(P<0.01).After EA stimulation
compared with the model group
the expression levels of Nav 1.5
Navβ1
β2
β3andβ4protein expression levels were significantly up-regulated in the Neiguang(PC 6)and Lieque(LU 7)groups(P<0.01)rather than in the non-acupoint group(P>0.05).There was no statistical significance between the Neiguan(PC 6)and Lieque(LU 7)groups inβ4protein expression level(P>0.05).Conclusion EA stimulation of both PC 6and LU 7can significantly reverse AMI-induced down-regulation of myocardial Nav 1.5
β1
β2
β3andβ4protein expression levels in AMI rats
which might contribute to its function in improving AMI by reducing calcium overload.