脊髓mcp-1调控fractalkine分泌致大鼠骨癌痛神经免疫机制-spinal mcp - 1 regulates the neural immune mechanism of bone cancer pain in rats induced by fractkin secretion..docx
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脊髓mcp-1调控fractalkine分泌致大鼠骨癌痛神经免疫机制-spinal mcp - 1 regulates the neural immune mechanism of bone cancer pain in rats induced by fractkin secretion.
脊髓MCP-1调控Fractalkine分泌致大鼠骨癌痛的神经免疫机制中文摘要morpholinurea-leucinehomophenylalanine-vinylphenylsulfone(LHVS)对骨癌痛大鼠疼痛行为学影响,并通过免疫组化和ELISA方法检测脊髓OX-42、FKN的表达和脑脊液中FKN水平变化。结果建模后10~12d连续鞘内注射LHVS后部分逆转骨癌痛大鼠机械性痛觉过敏反应(P0.01),并且减少脊髓OX-42的表达(P0.01),同时大鼠脑脊液中FKN表达水平下降(P0.01)。结论CatS通过介导FKN分泌参与大鼠骨癌痛的发展。[关键词]CathepsinS;Fractalkine/CX3CR1;骨癌痛;脊髓;小胶质细胞;大鼠第四部分MCP-1通过p38MAPK通路调控神经元Fractalkine分泌致大鼠骨癌痛目的探讨MCP-1是否通过p38MAPK通路调控神经元Fractalkine分泌致大鼠骨癌痛。方法采用雌性SD大鼠,建立胫骨癌痛模型,按照研究目的进行相应的实验分组,并通过疼痛行为学(n=8)、Real-timePCR(n=4)、Western-Blot(n=4)、免疫组织化学(n=4)和ELISA(n=4)方法进行以下研究:1、观察鞘内注射MCP-1中和抗体对骨癌痛大鼠脊髓p38、CX3CR1表达和脑脊液中FKN分泌的影响;2、观察鞘内注射MCP-1对正常大鼠脊髓p38、CX3CR1表达的影响;3、观察鞘内注射p38MAPK抑制剂4-(4-fluorophenyl)-2-(4-methylsulfinylphenyl)-5-(4-pyridyl)-1H-imidazole(SB203580)对骨癌痛大鼠疼痛行为学影响和脊髓CCR2、CX3CR1的表达及脑脊液中FKN分泌的变化。结果1、建模后10~12d鞘内连续注射MCP-1中和抗体显著减少骨癌痛大鼠脊髓p38mRNA和蛋白表达(P0.01),及CX3CR1mRNA和蛋白表达(P0.01);同时明显降低了脑脊液中FKN的水平(P0.01)。2、正常大鼠鞘内给予外源性MCP-1后明显增加p38和CX3CR1的蛋白表达水平(P0.01)。3、骨癌痛大鼠鞘内注射SB203580明显抑制大鼠骨癌痛的产生(P0.01);并可明显减少骨癌痛大鼠CCR2和CX3CR1的表达(P0.01)及脑脊液中FKN的水平(P0.01)。结论MCP-1可能通过激活p38MAPK通路介导神经元FKN分泌,进而作用于小胶质细胞CX3CR1受体参与大鼠骨癌痛。[关键词]p38MAPK;MCP-1/CCR2;Fractalkine/CX3CR1;骨癌痛;脊髓;大鼠作者:胡计嬅指导教师:杨建平教授英文摘要脊髓MCP-1调控Fractalkine分泌致大鼠骨癌痛的神经免疫机制NeuroimmunologicMechanismofSpinalMCP-1ModulatingtheReleaseofFractalkineinRatModelofBoneCancerPainAbstractWehavedescribedourmimicratmodelofbonecancerpain.Basedonthat,wepreviousstudieshavedemonstratedthatfractalkine,anewlydiscoveredchemokine,isimplicatedinspinalcordneuron-to-microgliaactivationsignalingaswellasmediationofbonecancerpainviaitssolereceptorCX3CR1,whichisspecificallyexpressedonmicroglia.Recently,ithasbeendemonstratedthatchemokineMonocytechemoattractantprotein-1(MCP-1,CCL2)/CCR2playsacriticalroleinpathologicalpainvianeuron–gliacommunication,resultingincentralsensitization;andregulatescirculatingmonocytesFractalkine/CX3CR1expressionandfunction.However,whetheritisinvolvedinbonecancerpainwhichisuniqueanddistinctfromneuropathicpain,andtheunderlyingmechanismshavenotbeenelucidated.Therefore,wespeculatedt
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