机构地区:[1]蚌埠医学院麻醉系,安徽省蚌埠市233030 [2]嘉兴学院附属第一医院麻醉与疼痛医学中心
出 处:《中华医学杂志》2018年第4期289-293,共5页National Medical Journal of China
基 金:国家自然科学基金(81341035,81471136);浙江省自然科学基金(LY16H090016,LY17H090019);浙江省医药卫生省部培育计划(2015PYA010);浙江省卫生高层次创新人才培养项目(2012-RC-22);浙北麻醉学区域专病中心项目;浙江省中西医结合疼痛医学重点学科建设项目(2012-XKA31);嘉兴市科技计划项目(2017AY33008)
摘 要:目的探讨骨癌痛大鼠脊髓趋化因子受体2(CCR2)与P38丝裂原活化蛋白激酶(P38MAPK)信号通路的关系,进一步明确骨癌痛的发生机制。方法健康雌性SD大鼠共92只,其中60只利用纤毛机械刺激针方法用于行为学试验,采用随机数字表法分为以下6组(n=10);假手术组(S组)、骨癌痛组(B组)、假手术+二甲亚砜(DMSO)溶剂组(SD组)、骨癌痛+DMSO组(BD组)、假手术+RS102895 CCR2抑制剂组(SR组)、骨癌痛+RS102895 CCR2抑制剂组(BR组)。另外32只SD大鼠采用随机数字表法分为以下8组(n=4);假手术组(S组)、骨癌痛5d组(B5组)、骨癌痛9d组(B9组)、骨癌痛14d组(B14组)、骨癌痛+DMSO溶剂组(BD组)、骨癌痛+RS102895 CCR2抑制剂后0.5h组(BR0.5h组)、骨癌痛+RS102895 CCR2抑制剂后4h组(BR4h组)、骨癌痛+RS102895 CCR2抑制剂后12h组(BR12h组),通过蛋白质印迹法(Western Blot)检测大鼠脊髓P38蛋白、磷酸化的P38(p-P38)和CCR2的表达水平。结果S组造模后5、7、9、14、21d的机械缩足反应阈值分别为(30.9±1.5)、(31.9±1.2)、(32.0±1.1)、(31.6±1.5)、(32.2±1.4)g,B组分别为(26.4±0.7)、(24.4±0.8)、(21.4±0.8)、(13.5±0.4)、(9.9±0.2)g,与S组比较,B组造模后5、7、9、14、21d时机械痛阈值降低,差异均有统计学意义(t=-13.177、-16.660、-23.778、-35.574、-48.401,均P〈0.01)。造模后第9天,SD组、BD组、SR组和BR组给药后4h机械缩足反应阈值分别为(32.4±1.7)、(19.4±1.1)、(32.1±1.3)、(26.3±1.0)g,差异有统计学意义(F=224.681,P〈0.01);与SD组比较,BD组机械痛阈值降低;与BD组比较,BR组机械痛阈值升高。S组、B5组、B9组、B14组大鼠脊髓P—P38表达水平分别为(0.08±0,03)、(0.20±0,05)、(0.Objective To investigate the relationship between C-C chemokine receptor type 2 (CCR2) and P38 mitogen-activated protein kinase (P38MAPK) signaling pathway in the spinal cord of rats and further clarify the mechanism of bone cancer pain (BCP). Methods A total of 92 healthy female SD rats, of which 60 were subjected to behavioral tests using a ciliary mechanical stimulation needle. SD rats were randomly divided into six groups:sham operation group (group S), bone cancer pain group (group B ), sham operation + DMSO solvent group (group SD ), bone cancer pain + DMSO solvent group (group BD) , sham operation + RS102895 CCR2 inhibitor group ( group SR) , bone cancer pain + RS102895 CCR2 inhibitor group (group BR), and Van Frey was used in the behavioral test. Another 32 SD rats were randomly divided into the following 8 groups ( n = 4) : sham operation group ( group S), bone cancer pain 5 d group ( group B5 ), bone cancer pain 9 d group ( group B9 ), bone cancer pain 14 d group ( group B14 ), bone cancer pain + DMSO solvent group ( group BD ) , bone cancer pain + RS102895 CCR2 inhibitor 0. 5 h group (group BR0. 5 h), bone cancer pain + RS102895 CCR2 inhibitor 4 h group (group BR4 h), bone cancer pain + RS102895 CCR2 inhibitor 12 h group (group BR12 h). Western blot was used to detect the expression of P38, p-P38 and CCR2 in spinal cord of rats. Results At day 5,7,9, 14,21 post-injection,mechanical withdrawal thresholds of group S were(30. 9 ± 1.5), (31.9± 1.2), (32. 0 ± 1.1 ), (31.6 ± 1.5), (32. 2 ± 1.4)g respectively, the mechanical withdrawal thresholds of group B were( 26.4 ±0. 7 ), ( 24.4±0. 8 ), ( 21.4 ± 0. 8 ), ( 13. 5 ±0. 4 ), ( 9. 9 ± 0. 2 ) g respectively, the mechanical withdrawal thresholds in group B decreased obviously versus group S, and the differences were statistically significant (t = - 13. 177, - 16. 660, - 23. 778, - 35. 574, - 48.401, all P 〈 0. 01 ).
关 键 词:受体 趋化因子 P38丝裂原活化蛋白激酶 疼痛
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