目的:探讨磷酸化雷帕霉素哺乳动物靶标(phosphorylate-mammalian target of rapamycin,p-mTOR)在人胆囊癌组织中的表达及其临床意义。方法:应用组织芯片技术和免疫组织化学(EnVision)方法检测来自上海市浦东新区人民医院外科和第二军医...目的:探讨磷酸化雷帕霉素哺乳动物靶标(phosphorylate-mammalian target of rapamycin,p-mTOR)在人胆囊癌组织中的表达及其临床意义。方法:应用组织芯片技术和免疫组织化学(EnVision)方法检测来自上海市浦东新区人民医院外科和第二军医大学长征医院肿瘤科2004-2007年间6例慢性胆囊炎、7例癌旁组织和59例胆囊癌组织中p-mTOR的表达,并分析其与胆囊癌浸润深度、分化、Nevin分期等病理特征之间的相关性。结果:p-mTOR在慢性胆囊炎组织、癌旁组织和癌组织中表达的阳性率分别为0、0和47.5%,表达差异有统计学意义(P<0.01)。p-mTOR在分化高、中和低/未分化的胆囊癌组织中阳性表达率分别为21.4%、48.1%和66.7%(P<0.01);在浸润至黏膜层/肌层、浆膜层和周围组织的胆囊癌组织中, p-mTOR的阳性表达率分别为30.0%、35.7%和71.4%(P<0.01);p-mTOR在Ⅰ/Ⅱ期、Ⅲ/Ⅳ期和Ⅴ期胆囊癌组织中的阳性表达率分别为11.1%、46.4%和66.7%,呈明显上升趋势(P<0.01)。结论:p-mTOR的表达与人胆囊癌的浸润深度、组织分化和Nevin分期密切相关,p-mTOR可能参与人胆囊癌的发生发展过程。展开更多
Defects in autophagy-mediated clearance of α-synuclein may be one of the key factors leading to progressive loss of dopaminergic neurons in the substantia nigra. Moxibustion therapy for Parkinson’s disease has been ...Defects in autophagy-mediated clearance of α-synuclein may be one of the key factors leading to progressive loss of dopaminergic neurons in the substantia nigra. Moxibustion therapy for Parkinson’s disease has been shown to have a positive effect, but the underlying mechanism remains unknown. Based on this, we explored whether moxibustion could protect dopaminergic neurons by promoting autophagy mediated by mammalian target of rapamycin （mTOR）, with subsequent elimination of α-syn. A Parkinson’s disease model was induced in rats by subcutaneous injection of rotenone at the back of their necks, and they received moxibustion at Zusanli （ST36）, Guanyuan （CV4）and Fengfu （GV16）, for 10 minutes at every point, once per day, for 14 consecutive days. Model rats without any treatment were used as a sham control. Compared with the Parkinson’s disease group, the moxibustion group showed significantly greater tyrosine hydroxylase immunoreactivity and expression of light chain 3-II protein in the substantia nigra, and their behavioral score, α-synuclein immunoreactivity,the expression of phosphorylated mTOR and phosphorylated ribosomal protein S6 kinase （p-p70S6K） in the substantia nigra were significantly lower. These results suggest that moxibustion can promote the autophagic clearance of α-syn and improve behavioral performance in Parkinson’s disease model rats. The protective mechanism may be associated with suppression of the mTOR/p70S6K pathway.展开更多
目的研究核糖体S6蛋白磷酸化(ribosomal S6 protein phosphorylation,P-S6)和细胞周期蛋白D1(CyclinD1)在翼状胬肉中的表达及相关性,探讨哺乳动物雷帕霉素靶蛋白复合物1(mammalian target of rapamycin complex 1,mTORC1)信号通路在翼...目的研究核糖体S6蛋白磷酸化(ribosomal S6 protein phosphorylation,P-S6)和细胞周期蛋白D1(CyclinD1)在翼状胬肉中的表达及相关性,探讨哺乳动物雷帕霉素靶蛋白复合物1(mammalian target of rapamycin complex 1,mTORC1)信号通路在翼状胬肉发病机制中的作用。方法收集翼状胬肉组织31例,正常结膜组织17例,利用免疫组织化学和Western blot进行P-S6和CyclinD1的检测及比较。结果 Western blot检测6例翼状胬肉组织中P-S6蛋白/S6蛋白表达(1.196±0.101)显著高于正常结膜组织(0.295±0.056),差异有统计学意义(P<0.05)。免疫组织化学染色结果显示:翼状胬肉中P-S6、CyclinD1的阳性表达率均为100%(25/25),正常结膜组织中P-S6阳性表达率为18.2%(2/11)、CyclinD1阳性表达率为9.1%(1/11),正常结膜组织与翼状胬肉组织中P-S6与CyclinD1表达差异均有统计学意义(均为P<.05)。翼状胬肉组织中P-S6与CyclinD1的表达呈正相关(r=0.752,P<0.05)。结论 mTORC1信号通路在翼状胬肉发病过程中起重要作用,并可能通过调控CyclinD1的表达来实现。展开更多
哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)调节细胞存活、增殖和代谢。阿尔茨海默病(Alzheimer's disease,AD)是一种常见的神经系统退行性疾病,发病机理复杂,与衰老密切相关。研究发现,AD的病理发展过程中经常...哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin,mTOR)调节细胞存活、增殖和代谢。阿尔茨海默病(Alzheimer's disease,AD)是一种常见的神经系统退行性疾病,发病机理复杂,与衰老密切相关。研究发现,AD的病理发展过程中经常伴随着mTOR活性的变化,但尚不清楚mTOR在AD发病机制中的作用。本文首先介绍了mTOR的复合物及其信号通路,重点综述了mTOR信号通路对突触可塑性和记忆功能、自噬作用、β-淀粉样蛋白(amyloid-β,Aβ)、Tau蛋白和脑胰岛素抵抗等AD病理特征的影响,其次阐述了m TOR两种信号通路在抗衰老和延长寿命方面的调控作用,最后介绍了mTOR抑制剂在AD病理研究中的应用,为延缓和改善AD提供新的思路。展开更多
目的:探究富含亮氨酸重复序列蛋白1(leucine-rich repeat protein 1,LRR1)在乳腺癌细胞中的表达及对其生物学功能的影响。方法:培养人乳腺癌MDA-MB-231、HCC70细胞株和正常乳腺上皮MCF-10A细胞;采用蛋白免疫印迹法检测LRR1表达。将人乳...目的:探究富含亮氨酸重复序列蛋白1(leucine-rich repeat protein 1,LRR1)在乳腺癌细胞中的表达及对其生物学功能的影响。方法:培养人乳腺癌MDA-MB-231、HCC70细胞株和正常乳腺上皮MCF-10A细胞;采用蛋白免疫印迹法检测LRR1表达。将人乳腺癌MDA-MB-231、HCC70细胞株分为干扰对照组、LRR1干扰组、LRR1过表达组和空载体对照组,分别转染LRR1对照、干扰、过表达、空载体序列;采用Transwell实验检测乳腺癌细胞迁移和侵袭能力;采用蛋白免疫印迹法检测细胞中哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin,m-TOR)表达。结果:与正常人乳腺上皮MCF-10A细胞相比,乳腺癌MDA-MB-231和HCC70细胞中LRR1表达水平显著增加(P均<0.01)。在人乳腺癌MDA-MB-231、HCC70细胞中,与干扰对照组相比,LRR1干扰组细胞迁移和侵袭数显著降低(P均<0.01),m-TOR表达水平明显降低(P<0.01);与空载体对照组相比,过表达LRR1组细胞迁移和侵袭数显著增加(P均<0.01),m-TOR蛋白表达水平明显增加(P均<0.01)。结论:LRR1在乳腺癌细胞中呈高表达,并可促进其迁移和侵袭。展开更多
文摘目的:探讨磷酸化雷帕霉素哺乳动物靶标(phosphorylate-mammalian target of rapamycin,p-mTOR)在人胆囊癌组织中的表达及其临床意义。方法:应用组织芯片技术和免疫组织化学(EnVision)方法检测来自上海市浦东新区人民医院外科和第二军医大学长征医院肿瘤科2004-2007年间6例慢性胆囊炎、7例癌旁组织和59例胆囊癌组织中p-mTOR的表达,并分析其与胆囊癌浸润深度、分化、Nevin分期等病理特征之间的相关性。结果:p-mTOR在慢性胆囊炎组织、癌旁组织和癌组织中表达的阳性率分别为0、0和47.5%,表达差异有统计学意义(P<0.01)。p-mTOR在分化高、中和低/未分化的胆囊癌组织中阳性表达率分别为21.4%、48.1%和66.7%(P<0.01);在浸润至黏膜层/肌层、浆膜层和周围组织的胆囊癌组织中, p-mTOR的阳性表达率分别为30.0%、35.7%和71.4%(P<0.01);p-mTOR在Ⅰ/Ⅱ期、Ⅲ/Ⅳ期和Ⅴ期胆囊癌组织中的阳性表达率分别为11.1%、46.4%和66.7%,呈明显上升趋势(P<0.01)。结论:p-mTOR的表达与人胆囊癌的浸润深度、组织分化和Nevin分期密切相关,p-mTOR可能参与人胆囊癌的发生发展过程。
基金supported by the National Natural Science Foundation of China,No.81403456,81473788a grant from the Hubei Provincial Collaborative Innovation Center of Preventive Treatment by Acupuncture and Moxibustion,No.HBPCIC-2016-003
文摘Defects in autophagy-mediated clearance of α-synuclein may be one of the key factors leading to progressive loss of dopaminergic neurons in the substantia nigra. Moxibustion therapy for Parkinson’s disease has been shown to have a positive effect, but the underlying mechanism remains unknown. Based on this, we explored whether moxibustion could protect dopaminergic neurons by promoting autophagy mediated by mammalian target of rapamycin （mTOR）, with subsequent elimination of α-syn. A Parkinson’s disease model was induced in rats by subcutaneous injection of rotenone at the back of their necks, and they received moxibustion at Zusanli （ST36）, Guanyuan （CV4）and Fengfu （GV16）, for 10 minutes at every point, once per day, for 14 consecutive days. Model rats without any treatment were used as a sham control. Compared with the Parkinson’s disease group, the moxibustion group showed significantly greater tyrosine hydroxylase immunoreactivity and expression of light chain 3-II protein in the substantia nigra, and their behavioral score, α-synuclein immunoreactivity,the expression of phosphorylated mTOR and phosphorylated ribosomal protein S6 kinase （p-p70S6K） in the substantia nigra were significantly lower. These results suggest that moxibustion can promote the autophagic clearance of α-syn and improve behavioral performance in Parkinson’s disease model rats. The protective mechanism may be associated with suppression of the mTOR/p70S6K pathway.
文摘目的研究核糖体S6蛋白磷酸化(ribosomal S6 protein phosphorylation,P-S6)和细胞周期蛋白D1(CyclinD1)在翼状胬肉中的表达及相关性,探讨哺乳动物雷帕霉素靶蛋白复合物1(mammalian target of rapamycin complex 1,mTORC1)信号通路在翼状胬肉发病机制中的作用。方法收集翼状胬肉组织31例,正常结膜组织17例,利用免疫组织化学和Western blot进行P-S6和CyclinD1的检测及比较。结果 Western blot检测6例翼状胬肉组织中P-S6蛋白/S6蛋白表达(1.196±0.101)显著高于正常结膜组织(0.295±0.056),差异有统计学意义(P<0.05)。免疫组织化学染色结果显示:翼状胬肉中P-S6、CyclinD1的阳性表达率均为100%(25/25),正常结膜组织中P-S6阳性表达率为18.2%(2/11)、CyclinD1阳性表达率为9.1%(1/11),正常结膜组织与翼状胬肉组织中P-S6与CyclinD1表达差异均有统计学意义(均为P<.05)。翼状胬肉组织中P-S6与CyclinD1的表达呈正相关(r=0.752,P<0.05)。结论 mTORC1信号通路在翼状胬肉发病过程中起重要作用,并可能通过调控CyclinD1的表达来实现。
文摘目的:探究富含亮氨酸重复序列蛋白1(leucine-rich repeat protein 1,LRR1)在乳腺癌细胞中的表达及对其生物学功能的影响。方法:培养人乳腺癌MDA-MB-231、HCC70细胞株和正常乳腺上皮MCF-10A细胞;采用蛋白免疫印迹法检测LRR1表达。将人乳腺癌MDA-MB-231、HCC70细胞株分为干扰对照组、LRR1干扰组、LRR1过表达组和空载体对照组,分别转染LRR1对照、干扰、过表达、空载体序列;采用Transwell实验检测乳腺癌细胞迁移和侵袭能力;采用蛋白免疫印迹法检测细胞中哺乳动物雷帕霉素靶蛋白(mammalian target of rapamycin,m-TOR)表达。结果:与正常人乳腺上皮MCF-10A细胞相比,乳腺癌MDA-MB-231和HCC70细胞中LRR1表达水平显著增加(P均<0.01)。在人乳腺癌MDA-MB-231、HCC70细胞中,与干扰对照组相比,LRR1干扰组细胞迁移和侵袭数显著降低(P均<0.01),m-TOR表达水平明显降低(P<0.01);与空载体对照组相比,过表达LRR1组细胞迁移和侵袭数显著增加(P均<0.01),m-TOR蛋白表达水平明显增加(P均<0.01)。结论:LRR1在乳腺癌细胞中呈高表达,并可促进其迁移和侵袭。
