摘要
应用大鼠鞘内预先注入对抗前强啡肽原表达的反义寡聚核苷酸技术 ,观察了此处理对动物后脚掌注射福尔马林 ( 5 %,1 0 0μl)诱发的行为痛反应的影响 ,同时在行为检查的 1 h后立即用免疫组化技术检测了大鼠腰髓背角 c-Fos蛋白和强啡肽 A( 1 -8)的表达。结果显示 ,上述反义寡聚核苷酸预处理可明显减弱注射福尔马林引起的行为痛反应 ,而且背角中强啡肽 A( 1 -8)表达下降 ,福尔马林引起背角 Fos蛋白合成不受影响。前已证明 ,鞘内注射对抗 c-fos的反义寡聚核苷酸 ,可以减弱福尔马林引起的痛反应 ,同时背角 Fos蛋白和强啡肽 A( 1 -8)表达量减小 ;因而本实验的结果表明 :( 1 )伤害性刺激诱导背角 Fos蛋白和强啡肽合成参与伤害性信息在脊髓的传递过程 ,Fos蛋白的合成先于强啡肽的合成。 ( 2 )在脊髓痛过敏状态的调制中 ,强啡肽是作为一种致痛因子而不是抗痛因子起作用。
By using intrathecal administration of antisense oligodeoxynucleotide (AS-ODN) against preprodynorphin mRNA in rats, we observed that this treatment could block both the formalin-induced behavioral nociceptive responses and the increased expression of dynorphin A (1-8) in the dorsal horn, with the increased expression of c-Fos protein being unchanged. For we have reported that intrathecal administration of AS-ODN against c-fos mRNA blocks the nociceptive responses and both the increased Fos protein and dynorphin A (1-8), the results of the present study suggest that: (1) Nociceptively induced spinal expression of dyorphin and Fos protein is involved in the transmission of nociceptive information at the spinal level and the expression of Fos protein is the up-stream event. (2) dynorphin may act as a pronociceptive, not an antinociceptive, factor in the modulation of the spinal hyperalgesic state.
出处
《神经解剖学杂志》
CAS
CSCD
北大核心
2003年第4期351-358,共8页
Chinese Journal of Neuroanatomy
关键词
前强啡肽原
反义寡聚核苷酸
强啡肽A
Fos蛋白
伤害性行为反应
脊髓背角
大鼠
preprodynorphin, antisense oligodeoxynucleotide, dynorphin A, Fos protein, behavioral nociceptive response, spinal dorsal horn, rat
