家兔中脑导水管周围灰质中注射八肽胆囊收缩素(CCK-8)拮抗吗啡镇痛和电针镇痛
曹威, 周仲福, 韩济生
北京医科大学生理教研室
摘要
家兔单侧PAG内注射CCK-8 3ng,能使静脉注射4mg/kg吗啡引起的镇痛作用降低73%或使电针镇痛效果降低67%。在1.5—6.0ng范围内呈量效关系。无硫的CCK-8无此作用。PAG内注射 CCK受体拮抗剂proglumide 4μg可翻转CCK-8的抗吗啡镇痛作用。 说明PAG部位注射外源性CCK-8可通过CCK受体对抗阿片镇痛。PAG内注射CCK-8抗血清可显著增强静脉注射2mg/kg吗啡的镇痛效果。PAG内注射CCM抗血清本身也能引起痛阈轻度升高。说明PAG内有内源性的CCK-8发挥紧张性的抗阿片镇痛作用。 图7参15
Antagonism of morphine analgesia and electroacupuncture analgesia by cholecystokinin octapeptide (CCK-8) administered in periaqueductal gray (PAG) of the rabbits
Cao Wei, Zhou Zhongfu, Han Jisheng
Dept. Physiol., Beiijng Med. Univ.
Abstract
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引用本文:
曹威, 周仲福, 韩济生. 家兔中脑导水管周围灰质中注射八肽胆囊收缩素(CCK-8)拮抗吗啡镇痛和电针镇痛[J]. 生理学报 1989; 41 (4): .
Cao Wei, Zhou Zhongfu, Han Jisheng. Antagonism of morphine analgesia and electroacupuncture analgesia by cholecystokinin octapeptide (CCK-8) administered in periaqueductal gray (PAG) of the rabbits. Acta Physiol Sin 1989; 41 (4): (in Chinese with English abstract).