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Apelin13增强大鼠吗啡镇痛效能及对p38 MAPK和ERK活化的影响

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摘要 目的探讨鞘内注射Apelin13(APL)对大鼠吗啡镇痛效能的影响。方法选取40只雄性健康SD大鼠进行鞘内置管,并随机分为对照组、APL高剂量(APL-H)组、中剂量(APL-M)组及低剂量(APL-L)组(n=10),APL-H、APL-M及APL-L组分别接受鞘内注射10μl含APL 0.05、0.5、5μg的MES缓冲液,对照组鞘内注射等体积的MES缓冲液,1次/d,连续5 d。各组均在鞘内给药前(d0)和给药后第6天(d6)、7(d7)、8(d8)天皮下注射10 mg/kg吗啡,测定各组右后爪的热刺激缩足反应潜伏期(PWTL)及甩尾潜伏期(TFL),并计算最大可能镇痛效应百分比(MPE)。第8天行为学测试结束后处死大鼠,采用Western印迹检测脊髓腰膨大处的磷酸化p38丝裂原活化蛋白激酶(p-p38 MAPK)和磷酸化细胞外调节蛋白激酶(p-ERK)的表达。结果各组d0时基础PWTL和TFL的差异无统计学意义(P>0.05),且对照组和APL-L组d0、d6、d7、d8时PWTL、MPE和TFL的差异无统计学意义(P>0.05);APL-M组和APL-H组d6~d8时的PWTL、MPE和TFL水平均高于d0,且APL-M组和APL-H组d6~d8时的PWTL、MPE和TFL水平均高于对照组(P<0.05);APL-M组和APL-H组的p-p38 MAPK和p-ERK水平均低于对照组和APL-L组,且APL-H组该两种蛋白水平均低于APL-L组和APL-M组(P<0.05)。结论鞘内注射APL可抑制热痛敏并提高吗啡镇痛效能,其机制可能与抑制p38 MAPK和ERK活化有关,在恢复吗啡耐受大鼠的吗啡镇痛效果上有一定价值。
出处 《中国老年学杂志》 CAS 北大核心 2017年第20期4966-4968,共3页 Chinese Journal of Gerontology
基金 青海省重大科技专项(2016-SF-A5)
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