摘要
目的:探讨切口痛-瑞芬太尼痛觉过敏大鼠背根神经节及海马Delta阿片受体mRNA表达水平的变化。方法:健康雄性SD大鼠32只,尾静脉置管后随机分为4组,瑞芬太尼组(R组)输注瑞芬太尼1μg·kg-1·min-1,切口痛组(I组)输注等体积生理盐水,甘氨酸组(G组)输注甘氨酸15μg·kg-1·min-1,对照组(C组)输注等体积生理盐水,最后一次痛阈测定后留取大鼠L4-L6背根神经节及海马标本,应用实时定量PCR方法测定Delta阿片受体mRNA的表达水平。结果:R组、I组、G组均发生痛觉过敏,且R组痛觉过敏的程度高于I组和G组;R组海马Delta阿片受体mRNA表达水平(4.359±1.031)显著高于C组、I组(2.373±1.014)和G组(2.411±0.326)(P<0.05);R组背根神经节Delta阿片受体mRNA表达水平(2.108±0.361)显著高于C组、I组(1.409±0.435)和G组(1.413±0.234)(P<0.05)。结论:瑞芬太尼可在切口痛模型大鼠中引发痛觉过敏,其机制可能与背根神经节及海马Delta阿片受体mRNA表达上调有关。
Objective To investigate the changes in the expression of delta-opioid receptor in dorsal root ganglion and hippocampus in rats with incisional pain(IP)-remifentanil-induced hyperalgesia. Methods Thir-ty-two SD male rats(250-280 g) were randomly divided into 4 groups: group R, remifentanil 1 μg·kg-1·min-1 was infused intravenously;group I, the same volume of saline was infused intravenously;group G, glycine 15μg· kg-1·min-1 was infused intravenously; group C, the same volume of saline was infused intravenously. Each animal was sacrificed after the last behavioral measurement. The dorsal root ganglion and hippocampus were removed for the evaluation of the expression of delta-opioid receptor mRNA by quantitative RT-PCR. Results Remi-fentanil-induced hyperalgesia developed in group R, I and G. Comparing with group C, I (2.373 ± 1.014) and G (2.411 ± 0.326), the expression of delta-opioid receptor mRNA in hippocampus was significantly up-regulated in group R (4.359 ± 1.031) (P〈0.05). Comparing with group C, I (1.409 ± 0.435) and G (1.413 ± 0.234), the expres-sion of delta-opioid receptor mRNA in dorsal root ganglion was significantly up-regulated in group R (2.108 ± 0.361) (P〈0.05). Conclusion These data indicate that the increased expression of delta-opioid receptor mRNA in dorsal root ganglion and hippocampus is involved in remifentanil-induced-hyperalgesia.
出处
《中国中西医结合外科杂志》
CAS
2014年第5期507-510,共4页
Chinese Journal of Surgery of Integrated Traditional and Western Medicine
基金
国家自然科学基金(30972847)