排序方式: 共有36条查询结果,搜索用时 31 毫秒
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目的 探讨尿毒症血液透析患者Treg/Th 17细胞功能是否发生失衡及其对血管钙化因子BMP-2表达的影响.方法 选取66例尿毒症血液透析患者(MHD组)、30例尿毒症未并发心血管疾病且未透析患者(WHD组)和20例健康志愿者,将MHD组患者分为并发心血管疾病(MHD1,n=36)和未并发心血管疾病(MHD2,n=3... 相似文献
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目的 观察p38丝裂原活化的蛋白激酶(MAPK)在高糖诱导的MC3T3-E1成骨细胞凋亡中的作用,并探讨其对凋亡相关信号分子caspase-3、bax及bcl-2表达的影响.方法 构建靶向p38MAPK的shRNA慢病毒载体,将体外培养的MC3T3-E1成骨细胞分为正常对照组(A组)、高糖组(B组)、p38MAPK-shRNA慢病毒转染组(C组)、信号转导阻断剂组(D组)和无关shRNA转染组(E组).RT-PCR检测细胞p38MAPK mRNA的表达,流式细胞术检测细胞凋亡,Western印迹检测p38MAPK、p-p38 MAPK、caspase-3、bax、bcl-2蛋白水平,透射电镜观察细胞超微结构.结果 构建靶向p38MAPK的shRNA慢病毒载体,并成功导入MC3T3-E1成骨细胞.与高糖组和无关转染组相比,p38MAPK-shRNA转染能显著抑制高糖诱导的MC3T3-E1细胞p38MAPK过度活化,明显减少细胞的凋亡(P<0.01);同时,p38MAPK-shRNA转染及p38MAPK阻断剂明显降低MC3T3-E1细胞中p38MAPK、p-p38MAPK、caspase-3及促凋亡基因bax蛋白表达,上调凋亡抑制基因bcl-2,与高糖组和无关转染组相比,差异有统计学意义(P<0.01,P<0.05).结论 慢病毒介导p38MAPK靶向RNA干扰可通过抑制p38MAPK 信号通路的活化,降低p-p38MAPK、caspase-3、bax表达,上调bcl-2表达,最终抑制高糖所诱导的MC3T3-E1成骨细胞的凋亡.Abstract: Objective To examine the role of p38MAPK in high glucose-induced apoptosis of osteoblast MC3T3-E1 cell line, and to investigate its effect on the expressions of apoptosis-related molecules including caspase3, bax, and bcl-2. Methods The lentiviral vector containing short hairpin RNA targeting p38MAPK was constructed. The cultured osteoblast MC3T3-E1 cell were divided into 5 groups:normal control group(A group), high glucose group(B group), p38MAPK-shRNA transfection group(C group), signal transduction inhibitor group(D group), and transfection with negative control siRNA group(E group). RT-PCR was used to determine the p38MAPK mRNA expression levels in MC3T3-E1 cells. Flow cytometry(FCM)was employed to detect the cell apoptotic percentage. The protein levels of apoptosis-related molecules p38MAPK, p-p38MAPK, caspase-3, bax, and bcl-2 were assayed by Western blot. Ultrastructural alternation of MC3T3-E1 cell was observed under transmission electron microscopy(TEM). Results The lentiviral vector containing short hairp in RNA targeting p38MAPK was successfully constructed and transfected into MC3T3-E1 cells. RT-PCR result suggested that the siRNA targeting p38MAPK could effectively reduce the p38MAPK mRNA expression level induced by high glucose in MC3T3-E1 cell line. FCM showed siRNA significantly decreased high glucose-induced apoptosis percentage of MC3T3-E1 cells(P<0.01). Meanwhile, we also found the siRNA significantly attenuated the proteins levels of p38MAPK, p-p38MAPK, caspase-3, and gene bax induced by high glucose in MC3T3-E1 cells, whereas the protein level of gene bcl-2 was enhanced remarkably when compared with high glucose group and negative control siRNA group(P<0.01, P<0.05).Conclusion The iRNA targeting p38MAPK suppressed high glucose-induced MC3T3-E1 cell apoptosis via inhibiting the activation of p38MAPK signaling pathway, thereby reducing the expressions levels of p-p38MAPK, caspase-3 and gene bax, and up-regulating the level of gene bcl-2. 相似文献
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1临床资料患者男性,32岁,汉族,因右下肢无力1年,加重4月,胸背痛10 d于2012年1月4日入院。患者缘于1年前无明显诱因出现右下肢乏力,无感觉异常,无大小便障碍,无头昏、头痛等,能正常行走及进行日常工作生活,未重视。4月前右下肢无力明显加重,仍无其他伴随症状,在外院行腰椎CT平扫,诊断为"腰椎间盘突出",对症治疗无效。2011年12月 相似文献
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目的 评估阿格列汀联合高压氧舱内运动意念对糖尿病无症状脑梗死(SCI)患者功能损害的疗效。方法 选取60 例新诊断2 型糖尿病SCI 患者为研究对象,将研究对象随机分为阿格列汀治疗组(A 组)和阿格列汀联合高压氧舱内运动意念组(B 组),每组30 例。治疗前后进行神经功能缺损程度和蒙特利尔认知评估量表评估,ELISA 测血清GP Ⅵ和尿11- 脱氢血栓素B2(11-DH-TXB2)水平,Western blot 检测微管相关蛋白2(MAP-2)的表达。结果 与A 组相比,B 组患者神经功能缺损程度、GP Ⅵ、11-DH-TXB2 及MAP-2 表达水平降低(P <0.05),而B 组患者MoCA 评分高于A 组,其中视空间/ 执行能力、注意力与集中评分、综合评分增高(P <0.05),计算、抽象思维、语言能力、记忆力及定向力评分比较,差异无统计学意义(P >0.05),治疗前后两组组内差异呈时间依赖性。结论 阿格列汀联合高压氧舱内运动意念可更好地促进糖尿病SCI 患者血栓溶解吸收和脑损伤恢复,改善神经认知功能。 相似文献
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目的探讨转录活化蛋白-1(activator protein-1,AP-1)在高糖诱导的肾小管上皮细胞表型转化中的作用。方法将体外培养的人肾小管上皮细胞(human kidney proximal tubular epithelial cell,HK2)分为正常对照组、高糖组、AP-1阻断组。光镜、透射电镜观察细胞形态的改变,免疫细胞化学法检测α-平滑肌肌动蛋白(α—SMA)和细胞角蛋白(cytokeratin,CK)的表达,用凝胶电泳迁移率改变分析法(electrophoretic mobility shift assay,EMSA)检测HK2细胞AP-1的改变,RT—PCR法检测CKmRNA的表达,Westernblot检测α-SMA蛋白的表达。结果高糖作用48h后,HK2细胞由椭圆形贴壁生长变为长梭形,胞体拉长,透射电镜下,细胞表面微绒毛明显减少,胞质内粗面内质网丰富,而AP-1阻断组较高糖组明显减轻;EMSA结果分析表明,在高糖刺激下,AP-1结合活力较正常对照组增加79.22%(P〈0.05),而AP-1阻断剂可明显抑制AP—1的活化,较高糖组降低51.19%(P〈0.05);免疫细胞化学和RT—PCR检测显示,高糖组和AP-1阻断组CKmR—NA和蛋白水平明显降低(P〈0.05),而AP—1阻断组显著高于高糖组(P〈0.05);免疫细胞化学和Westernblot检测显示,高糖组和AP-1阻断组α—SMA蛋白表达明显高于正常组(P〈0.05),而AP-1阻断组显著低于高糖组(P〈0.05)。结论高糖能够导致肾小管上皮细胞AP-1活化,诱导其表型转化。 相似文献