目的:探讨温针灸对类风湿性关节炎(RA)大鼠关节滑膜组织沉默信息调节因子2相关酶1(SIRT 1)表达的影响,以及对核转录因子-κB(NF-κB)的调节作用,分析温针灸改善RA的机制。方法:SD大鼠50只(雌雄各半),随机分为正常组、模型组、抑制剂组...目的:探讨温针灸对类风湿性关节炎(RA)大鼠关节滑膜组织沉默信息调节因子2相关酶1(SIRT 1)表达的影响,以及对核转录因子-κB(NF-κB)的调节作用,分析温针灸改善RA的机制。方法:SD大鼠50只(雌雄各半),随机分为正常组、模型组、抑制剂组、温针灸组、抑制剂+温针灸组,每组10只,采用皮内注射牛Ⅱ型胶原接种诱发制备大鼠RA模型,共21d。温针灸组于造模第1天取"足三里""肾俞"和"悬钟"温针灸治疗,刺激量以大鼠耐受为度,1次/d,共21d。抑制剂组于造模第1、7、14、21天腹腔内注射SIRT 1抑制剂尼克酰胺溶液。抑制剂+温针灸组于造模同时给予SIRT 1抑制剂,温针灸治疗同温针灸组。所有大鼠采用排水法测肿胀关节部体积,放射免疫法检测血清炎性因子IL-1β、IL-6和IL-8含量,免疫印迹法检测膝关节滑膜组织SIRT 1和NF-κB p 65蛋白的表达。结果:与正常组相比,模型组大鼠关节肿胀明显,血清中炎性因子IL-1β、IL-6和IL-8含量较高,膝关节滑膜组织SIRT 1蛋白表达减少,NF-κB p 65蛋白表达增加(P<0.01)。与模型组相比,温针灸组大鼠关节肿胀改善明显,炎性因子IL-1β、IL-6和IL-8含量减少,SIRT 1蛋白表达升高,NF-κB p 65蛋白表达降低(P<0.05)。与温针灸组相比,抑制剂+温针灸组大鼠关节肿胀改善程度较差(P>0.05);血清中炎性因子IL-1β、IL-6和IL-8含量较高,膝关节滑膜组织SIRT 1蛋白表达减少,NF-κB p 65蛋白表达增加(P<0.05)。结论:温针灸能有效降低RA大鼠血清炎性因子,调节关节滑膜组织SIRT 1和NF-κB p 65表达,这可能是温针灸改善RA关节炎性损伤的机制之一。展开更多
The tissue destruction characteristic of syphilis infection may be caused by inflammation due to Treponema pallidum and the ensuing immune responses to the pathogen.T.pallidum membrane proteins are thought to be poten...The tissue destruction characteristic of syphilis infection may be caused by inflammation due to Treponema pallidum and the ensuing immune responses to the pathogen.T.pallidum membrane proteins are thought to be potent inducers of inflammation during the early stages of infection.However,the actual membrane proteins that induce inflammatory cytokine production are not known,nor are the molecular mechanisms responsible for triggering and sustaining the inflammatory cascades.In the present study,Tp0751 recombinant protein from T.pallidum was found to induce the production of proinflammatory cytokines,including TNF-α,IL-1βand IL-6,in a THP-1 human monocyte cell line.The signal transduction pathways involved in the production of these cytokines were then further investigated.No inhibition of TNF-a,IL-1β,or IL-6 production was observed following treatment with the SAPK/JNK specific inhibitor SP600125 or with an ERK inhibitor PD98059.By contrast,anti-TLR2 mAb,anti-CD14 mAb,and the p38 inhibitor SB203580 significantly inhibited the production of all three cytokines.In addition,pyrrolidine dithiocarbamate (PDTC),a specific inhibitor of NF-κB,profoundly inhibited the production of these cytokines.Tp0751 treatment strongly activated NF-κB,as revealed by Western blotting.However,NF-κB translocation was significantly inhibited by treatment with PDTC.These results indicated that TLR2,CD14,MAPKs/p38,and NF-κB might be implicated in the inflammatory reaction caused by T.pallidum infection.展开更多
文摘目的:探讨温针灸对类风湿性关节炎(RA)大鼠关节滑膜组织沉默信息调节因子2相关酶1(SIRT 1)表达的影响,以及对核转录因子-κB(NF-κB)的调节作用,分析温针灸改善RA的机制。方法:SD大鼠50只(雌雄各半),随机分为正常组、模型组、抑制剂组、温针灸组、抑制剂+温针灸组,每组10只,采用皮内注射牛Ⅱ型胶原接种诱发制备大鼠RA模型,共21d。温针灸组于造模第1天取"足三里""肾俞"和"悬钟"温针灸治疗,刺激量以大鼠耐受为度,1次/d,共21d。抑制剂组于造模第1、7、14、21天腹腔内注射SIRT 1抑制剂尼克酰胺溶液。抑制剂+温针灸组于造模同时给予SIRT 1抑制剂,温针灸治疗同温针灸组。所有大鼠采用排水法测肿胀关节部体积,放射免疫法检测血清炎性因子IL-1β、IL-6和IL-8含量,免疫印迹法检测膝关节滑膜组织SIRT 1和NF-κB p 65蛋白的表达。结果:与正常组相比,模型组大鼠关节肿胀明显,血清中炎性因子IL-1β、IL-6和IL-8含量较高,膝关节滑膜组织SIRT 1蛋白表达减少,NF-κB p 65蛋白表达增加(P<0.01)。与模型组相比,温针灸组大鼠关节肿胀改善明显,炎性因子IL-1β、IL-6和IL-8含量减少,SIRT 1蛋白表达升高,NF-κB p 65蛋白表达降低(P<0.05)。与温针灸组相比,抑制剂+温针灸组大鼠关节肿胀改善程度较差(P>0.05);血清中炎性因子IL-1β、IL-6和IL-8含量较高,膝关节滑膜组织SIRT 1蛋白表达减少,NF-κB p 65蛋白表达增加(P<0.05)。结论:温针灸能有效降低RA大鼠血清炎性因子,调节关节滑膜组织SIRT 1和NF-κB p 65表达,这可能是温针灸改善RA关节炎性损伤的机制之一。
基金supported by the National Natural Science Foundation of China (Grant No. 30800996)the National Natural Science Foundation of Hunan Province (Grant No. 07ii3028)
文摘The tissue destruction characteristic of syphilis infection may be caused by inflammation due to Treponema pallidum and the ensuing immune responses to the pathogen.T.pallidum membrane proteins are thought to be potent inducers of inflammation during the early stages of infection.However,the actual membrane proteins that induce inflammatory cytokine production are not known,nor are the molecular mechanisms responsible for triggering and sustaining the inflammatory cascades.In the present study,Tp0751 recombinant protein from T.pallidum was found to induce the production of proinflammatory cytokines,including TNF-α,IL-1βand IL-6,in a THP-1 human monocyte cell line.The signal transduction pathways involved in the production of these cytokines were then further investigated.No inhibition of TNF-a,IL-1β,or IL-6 production was observed following treatment with the SAPK/JNK specific inhibitor SP600125 or with an ERK inhibitor PD98059.By contrast,anti-TLR2 mAb,anti-CD14 mAb,and the p38 inhibitor SB203580 significantly inhibited the production of all three cytokines.In addition,pyrrolidine dithiocarbamate (PDTC),a specific inhibitor of NF-κB,profoundly inhibited the production of these cytokines.Tp0751 treatment strongly activated NF-κB,as revealed by Western blotting.However,NF-κB translocation was significantly inhibited by treatment with PDTC.These results indicated that TLR2,CD14,MAPKs/p38,and NF-κB might be implicated in the inflammatory reaction caused by T.pallidum infection.
