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肝脏疾病的发病率逐年上升,由于肝脏疾病发病诱因复杂和发病机制尚未阐明,治愈率不够理想,迫切需要明确其作用机制以找到更有效的治疗靶点与药物。长链非编码RNA( long non-coding RNA,lncRNA)作为一种长度超过200 nt的非编码RNA,是近年来肝脏疾病的研究热点。本文以肝脏疾病中主要的信号转导通路为主线,对近年来lncRNA调控肝脏疾病相关信号通路的最新研究进展进行归纳总结,详细阐述lncRNA通过调节肝脏疾病中关键的信号通路,参与细胞增殖、凋亡、侵袭、迁移等多种生理过程,从而促进肝脏疾病的发生发展,为肝脏疾病的机制研究提供新的思路,为寻找治疗肝脏疾病的新靶点及生物标志物提供新的研究方向。 相似文献
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目的 研究雷公藤甲素对正常人肝细胞株L-02细胞凋亡和活性氧生成的影响.方法 体外培养L-02细胞,MTT法检测雷公藤甲素对L-02细胞的毒性作用,H2DCFH-DA探针流式细胞仪检测细胞中ROS生成量,并测定细胞SOD活性、MDA含量及LDH释放量的变化.结果 雷公藤甲素诱导L-02细胞中ROS生成,且随时间的延长而增多,至12h时达峰值(P<0.01);同时,雷公藤甲素也能诱导细胞中MDA含量及LDH释放量的增加,诱导SOD活性的降低.结论 雷公藤甲素体外诱导人正常肝细胞L-02细胞凋亡可能与其促进活性氧生成有关. 相似文献
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何首乌作为中国的名贵中药材之一被用于治疗多种疾病,如脱发、白发、心血管疾病及皮肤疾病等,但近年来其诱发的肝损伤引起广泛关注。本文在已有临床病例报道和临床前毒理学相关研究的基础上对何首乌肝损伤特征和肝损伤部位及成分加以总结,并为何首乌临床合理用药提供相关建议。 相似文献
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Objective: To observe the impairing effects of triptolide on liver mitochondria in isolated rat-liver mitochondria and human normal liver HL7702 cell line. Methods: Rat-liver mitochondria were isolated from adult female Sprague–Dawley (SD) rats. Liver mitochondria were incubated with 0, 1.25, 2.5, 5 and 10 μmol/L triptolide for detecting mitochondrial swelling and with 0, 2.5, 5 and 10 μmol/L triptolide for mitochondrial permeability transition pore (MPTP) activity. Mitochondrial swelling was estimated by measuring the apparent absorbance change during 600 s in the mitochondrial suspensions at 520 nm with a mitochondrial swelling examining kit. The effect of triptolide on MPTP was determined with a fluorescence detection kit by detecting the fluorescence intensity at an excitation wavelength of 488 nm emitted at 527 nm. Human normal liver HL7702 cells were treated without or with 0.02, 0.1 and 0.5 μmol/L triptolide for 24 h for analyzing mitochondrial transmembrane potential (△Ψm) and reactive oxygen species (ROS). △Ψm was measured using the fluorescent probe 5,5'',6,6''-tetrachloro-1,1'',3,3''-tetraethylbenzimidazolylcarbocyanine iodide (JC-1). ROS was measured using fluorescent probe 2'',7''-dichlorofluorescin diacetate (DCFH-DA). The cells were harvested and dyed with JC-1 and DCFH-DA, and analyzed by flow cytometry, respectively. Results: Incubation of isolated mitochondria with triptolide results in swollen mitochondria in a concentration-dependent manner. Moreover, triptolide significantly activated mitochondrial permeability transition at 5 and 10 μmol/L (P<0.05 and P<0.01). When HL7702 cells were exposed to a various concentration triptolide for 24 h, mitochondrial membrane depolarization and increase of ROS were caused by triptolide in a concentration-dependent manner. Triptolide significantly induced the mitochondrial membrane depolarization at 0.1 and 0.5 μmol/L (P<0.05 and P<0.01) and the increase of ROS at 0.1 and 0.5 μmol/L (P<0.05 and P<0.01). Conclusion: Triptolide could induce mitochondrial impairment, which may be one of the mechanisms by which hepatotoxicity occurs. 相似文献
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目的试图建立一种操作简便、检查限量极低并适合中药注射剂缩合鞣质检查方法。方法将蛋白质包被的PVDF膜片安装在一滤过孔径为2 mm的过滤装置上,将一定体积的中药注射剂溶液通过蛋白质包被PVDF膜,用有机溶剂脱去杂色,根据膜片颜色深浅判断缩合鞣质限量。结果当通过蛋白质包被PVDF膜的样品体积为0.5 mL时检查限量约为0.07 mg/mL,检查限量低于2010年版《中华人民共和国药典(一部)》。本法能直接检测出4种上市中药注射液(清开灵注射液、双黄连注射液、丹参注射液和灯盏细辛注射液)存在微量缩合鞣质。结论本法操作简便并具有较强的抗干扰能力,检测限低,可以用于中药注射剂微量缩合鞣质限量的严格控制。 相似文献
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目的:研究雷公藤甲素对正常人肝细胞株L-02细胞的损伤作用及其对肝CYP3A及CYP2E1蛋白表达量的影响。方法:体外培养L-02细胞,MTT法检测雷公藤甲素对L-02细胞的损伤,试剂盒测定培养基上清液中AST、ALT及AKP活性,Western-blot测定细胞中CYP3A及CYP2E1蛋白的含量。结果:雷公藤甲素对L-02细胞有损伤作用,且随雷公藤甲素浓度的增加或孵育时间的延长,其损伤作用增强,同时,培养基中AST、ALT及AKP的活性增强;雷公藤甲素诱导细胞中CYP3A蛋白表达减弱,CYP2E1蛋白表达增强。结论:雷公藤甲素体外对人正常肝细胞L-02细胞有损伤作用,且能影响肝CYP450酶系的表达。 相似文献
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