摘要
本研究用多管微电极细胞外记录和离子微电泳方法,以Wistar大鼠为实验对象,观察了P物质(SP)对脊髓背角神经元自发放电和慢性伤害性痛放电的影响以及与5-羟色胺(5-HT)和生长抑素(SOM)的关系。结果表明:(1)电泳SP可使脊髓背角神经元单位放电增多。(2)电泳SP又可抑制福尔马林(Formalin)引起的神经元慢性伤害性痛放电。(3)电泳5-HT和SOM可抑制SP及慢痛诱发的脊髓背角神经元放电。上述结果提示:在痛觉调制过程中,脊髓内SP起着传递痛觉信息和镇痛的双重作用,5-HT和SOM可通过抑制SP的效应,参与痛觉调制。
The effects of SP on the electric activities of neurons of spinal dorsal horn and the influence of 5-HT, somatostat in (SOM ) on the effects of SP were observed in anesthet ized rats with multimicropipeteand iontophoresis techniques. It was found that. (1 ) The m icroiontop horetically administrating of SPcould increase spinal dorsal horn unit discharge. (2) The noxious electrical activity of neurons inducedby formalin could be inhibited by microiontophoretically applied SP. (3 ) The mi croiontophoretically ad -ministrating of 5-HT and SOM could inhibit the SP and formalin evoked unit discharge of neurons inspinal dorsal horn. It was suggested that SP took a double-effect part in modulation of pain transmissionand analgesia in spinal cord, 5-HT and SOM inhibited the effect of SP and participated in pain modula-tion of SP.
出处
《针刺研究》
CAS
CSCD
1996年第3期27-31,共5页
Acupuncture Research
基金
全军"八五"攻关课题青年基金