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期刊论文
NITRIC OXIDE IN vPAG MEDIATES TIlE DEPRESSOR RESPONSE TO ACUPUNCTURE IN STRESS-INDUCED HYPERTENSIVE RATS
ACUPUNCTURE & ELECTRO-THERAPEUTICS RES., INF. J., Vol.26, pp. 165-170, 2001,-0001,():
The hypertensive rat model was made by chro'nic stress of electric foot-shocks and noises. On such hypertensive rats. when anesthetized with urethane and chloralose, the electroacupuncture (EA) to bilateral "Zusanli (st.36)" acupolnts for 20min, could resuh in a depressor (including both systolic and diastolic pressure) and bradycardiac response as well as an attenuation in the maximum of left ventficular pressure, end diastolic pressure and ±dp/dt. fit power spectrum analysis of heart rate variability aspect, EA could increase all total variance, very low frequency component, low frequency component and the ratio of low frequency component and high frequency component, When EA with microinjection of Nω-Nitro-L-Arginine, a blocker of the formation of nitric oxide, into the ventral periaqueductal gray matter (vPAG), the above effects of EA were abolished or reduced significantly. The results suggest that the depressor effect of EA on stress-induced hypertensive rats might be mediated by nitric oxide in the vPAG due to activation of sympathegc inhibitory system and by attenuated cardiac activities.
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