微电泳不同递质受体阻断剂对下丘脑室旁核痛单位诱发反应的效应  

Effects of Microiontophoretically Applied Some Different Transmitter Receptor Antagonists on the Evoked Response of “Pain” Units of Hypothalamic Paraventricular Nucleus

作　　者：王春安[1] 李太志[2] 叶阿莉[1] 陈宜张[1] 

机构地区：[1]第二军医大学训练部生理学教研室神经科学实验室,200433 [2]徐州医学院生理学教研室,221002

出　　处：《第二军医大学学报》1992年第2期137-141,共5页Academic Journal of Second Military Medical University

摘　　要：本文报道微电泳不同递质阻断剂对下丘脑室旁核(PVN)痛单位诱发反应的效应。结果表明:(1)PVN痛单位中,阿托品可阻断38个中的7个;六烃季胺阻断27个中的5个,普奈洛尔阻断25个中的4个;酚妥拉明阻断31个中的6个;赛庚啶对52个中的17个有影响,其中14个压抑诱发反应,3个加强其诱发反应。(2)两种受体阻断剂可阻断同一PVN痛单位的诱发反应;阿托品和赛庚啶阻断27个中的2个;六烃季胺和赛庚啶阻断20个中的3个;普奈洛尔和赛庚啶阻断25个中的2个。结果表明:(1)躯体痛信息到下丘脑PVN传入的递质受体机制的多样性。(2)同一PVN痛单位可能接受不同递质系统的传入。Effects of microiontophoretically applied transmitter receptor antagonists on the evoked response of “pain” units of PVN in rats by sciatic stimulation were observed. The results showed: (l)The evoked response of 7 out of 38 PVN “pain” units could be blocked by atropine (7/38); 5 out of 27 by hexamethonium; 6 out of 31 by phentolamine (6/31); and 4 out of 25 by propranolol (4/25). Seventeen out of 52 were blocked by cyproheptadine (17/52), but 3 out of 52 were augmented by cyproheptadine (3/52). (2) The evoked response of the same “pain” unit could be blocked by two antagonists: the evoked response of 2 out of 27 PVN “pain” units could be blocked by atropine and cyprohepadine; 3 out of 20 by hexamethonium and cyproheptadine; 2 out of 25 by prepamolol and cyproheptadine. These results suggest that the noxious somatic input to PVN involves 5-HT, cholinergic and adrenergic transmitter receptor mechanisms and that the convergence of various transmitter systems on PVN “pain” unit is indicated.

关 键 词：微电泳 阻断剂 坐骨神经 大鼠 PVN 

分 类 号：R338.3[医药卫生—人体生理学]