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Loss of monopolar spindle-binding protein 3B expression promotes colorectal cancer malignant behaviors by activation of target of rapamycin kinase/autophagy signaling
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作者 Juan Sun Jin-Xiu Zhang +8 位作者 Meng-Shi Li Meng-Bin Qin Ruo-Xi Cheng Qing-Ru Wu Qiu-Ling Chen Dan Yang Cun Liao Shi-Quan Liu Jie-An Huang 《World Journal of Gastroenterology》 SCIE CAS 2024年第26期3229-3246,共18页
BACKGROUND Monopolar spindle-binding protein 3B(MOB3B)functions as a signal transducer and altered MOB3B expression is associated with the development of human cancers.AIM To investigate the role of MOB3B in colorecta... BACKGROUND Monopolar spindle-binding protein 3B(MOB3B)functions as a signal transducer and altered MOB3B expression is associated with the development of human cancers.AIM To investigate the role of MOB3B in colorectal cancer(CRC).METHODS This study collected 102 CRC tissue samples for immunohistochemical detection of MOB3B expression for association with CRC prognosis.After overexpression and knockdown of MOB3B expression were induced in CRC cell lines,changes in cell viability,migration,invasion,and gene expression were assayed.Tumor cell autophagy was detected using transmission electron microscopy,while nude mouse xenograft experiments were performed to confirm the in-vitro results.RESULTS MOB3B expression was reduced in CRC vs normal tissues and loss of MOB3B expression was associated with poor CRC prognosis.Overexpression of MOB3B protein in vitro attenuated the cell viability as well as the migration and invasion capacities of CRC cells,whereas knockdown of MOB3B expression had the opposite effects in CRC cells.At the molecular level,microtubule-associated protein light chain 3 II/I expression was elevated,whereas the expression of matrix metalloproteinase(MMP)2,MMP9,sequestosome 1,and phosphorylated mechanistic target of rapamycin kinase(mTOR)was downregulated in MOB3B-overexpressing RKO cells.In contrast,the opposite results were observed in tumor cells with MOB3B knockdown.The nude mouse data confirmed these in-vitro findings,i.e.,MOB3B expression suppressed CRC cell xenograft growth,whereas knockdown of MOB3B expression promoted the growth of CRC cell xenografts.CONCLUSION Loss of MOB3B expression promotes CRC development and malignant behaviors,suggesting a potential tumor suppressive role of MOB3B in CRC by inhibition of mTOR/autophagy signaling. 展开更多
关键词 Colorectal cancer Monopolar spindle-binding protein 3B Mechanistic target of rapamycin kinase AUTOPHAGY Prognosis
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Casein kinase 2 interacts with and phosphorylates ataxin-3 被引量:3
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作者 陶瑞松 费尔康 +2 位作者 应征 王洪枫 王光辉 《Neuroscience Bulletin》 SCIE CAS CSCD 2008年第5期271-277,共7页
Objective Machado-Joseph disease (MJD)/Spinocerebellar ataxia type 3 (SCA3) is an autosomal dominant neurodegenerative disorder caused by an expansion of polyglutamine tract near the C-terminus of the MJD1 gene pr... Objective Machado-Joseph disease (MJD)/Spinocerebellar ataxia type 3 (SCA3) is an autosomal dominant neurodegenerative disorder caused by an expansion of polyglutamine tract near the C-terminus of the MJD1 gene product, ataxin-3. The precise mechanism of the MJD/SCA3 pathogenesis remains unclear. A growing body of evidence demonstrates that phosphorylation plays an important role in the pathogenesis of many neurodegenerative diseases. However, few kinases are known to phosphorylate ataxin-3. The present study is to explore whether ataxin-3 is a substrate of casein kinase 2 (CK2). Methods The interaction between ataxin-3 and CK2 was identified by glutathione S-transferase (GST) pull-down assay and co-immunoprecipition assay. The phosphorylation of ataxin-3 by CK2 was measured by in vitro phosphorylation assays. Results (1) Both wild type and expanded ataxin-3 interacted with CK2α and CK2β in vitro. (2) In 293 cells, both wild type and expanded ataxin-3 interacted with CK2β, but not CK2α. (3) CK2 phosphorylated wild type and expanded ataxin-3. Conclusion Ataxin-3 is a substrate of protein kinase CK2. 展开更多
关键词 Machado-Joseph disease/spinocerebellar ataxia type 3 ATAXIN-3 casein kinase 2 PHOSPHORYLATION
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血管生成素-1激活tyrosine kinase/PI3K增加血管内皮细胞[Mg^2+]i 被引量:3
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作者 谢同杰 洪炳哲 +5 位作者 李胜范 王丽萍 朴海南 高立建 刘学田 陈毓婷 《中国病理生理杂志》 CAS CSCD 北大核心 2008年第9期1665-1669,共5页
目的:探讨血管生成素-1(Ang-1)对人脐静脉内皮细胞(HUVECs)内游离镁离子浓度([Mg2+]i)的调节机制。方法:我们采用荧光指示剂mag-fura-2,运用PTi阳离子测定系统动态测HUVECs的[Mg2+]i。结果:Ang-1诱导的[Mg2+]i增加与细胞外Mg2+浓度无关... 目的:探讨血管生成素-1(Ang-1)对人脐静脉内皮细胞(HUVECs)内游离镁离子浓度([Mg2+]i)的调节机制。方法:我们采用荧光指示剂mag-fura-2,运用PTi阳离子测定系统动态测HUVECs的[Mg2+]i。结果:Ang-1诱导的[Mg2+]i增加与细胞外Mg2+浓度无关。Ang-1诱导的[Mg2+]i增加与细胞内Ca2+浓度无关。经酪氨酸激酶阻断剂(tyrphostin A23和genistein),磷脂酰3激酶阻断剂(wortmannin和LY294002)预处理,均显著阻断Ang-1诱导的[Mg2+]i增加。但经活化丝裂原激活激酶阻断剂(SB202190和PD98059)预处理,不能阻断Ang-1诱导的[Mg2+]i增加。结论:Ang-1通过酪氨酸激酶/磷脂酰3激酶信号传递途径使细胞内的Mg2+库释放Mg2+,从而增加HUVECs的[Mg2+]i。 展开更多
关键词 血管生成素1 酪氨酸激酶 1-磷脂酰肌醇3-激酶
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PI3 kinase/Akt通路对颌骨代谢的调节 被引量:4
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作者 马攀 刘洪臣 吴霞 《中华老年口腔医学杂志》 2009年第2期110-113,共4页
胰岛素不仅在糖尿病中发挥重要的作用,在骨的代谢中也是关键的调节因子,胰岛素与胰岛素受体结合,促进胰岛素受体底物(IRS)发生酪氨酸磷酸化,进而激活PI3kinase/Akt通路。PI3kinase/Akt通路参与了多种细胞的增殖分化,越来越多的证据证明,... 胰岛素不仅在糖尿病中发挥重要的作用,在骨的代谢中也是关键的调节因子,胰岛素与胰岛素受体结合,促进胰岛素受体底物(IRS)发生酪氨酸磷酸化,进而激活PI3kinase/Akt通路。PI3kinase/Akt通路参与了多种细胞的增殖分化,越来越多的证据证明,PI3kinase/Akt通路在骨细胞的增殖、分化起重要作用。本文就PI3kinase/Akt通路对骨代谢的调节作一综述,希望能为骨代谢疾病患者种植牙的药物选择提供思路。 展开更多
关键词 牙种植 糖尿病 胰岛素 胰岛素受体底物(IRS) PI3 kinase Akt
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基于PI3K/AKT信号通路探讨DJ-1蛋白对抑郁症大鼠海马中神经递质的影响
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作者 李笑然 蔡云峰 +2 位作者 丁兆猛 孙祥生 卢煜晨 《医学分子生物学杂志》 CAS 2025年第1期55-61,75,共8页
目的探讨DJ-1蛋白对抑郁症大鼠神经递质的影响。方法TUNEL(terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling)试剂盒检测细胞凋亡率。酶联免疫吸附法测定血清中肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α... 目的探讨DJ-1蛋白对抑郁症大鼠神经递质的影响。方法TUNEL(terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling)试剂盒检测细胞凋亡率。酶联免疫吸附法测定血清中肿瘤坏死因子-α(tumor necrosis factor-α,TNF-α)和白细胞介素-6(interleukin-6,IL-6)的含量,海马区中5-羟色胺(5-hydroxytryptamine,5-HT)、5-羟吲哚乙酸(5-hydroxyindoleacetic acid,5-HIAA)、多巴胺(dopamine,DA)的水平;蛋白质印迹检测海马区DJ-1、磷脂酰肌醇3激酶(phosphatidylinositol 3 kinase,PI3K)、蛋白激酶B(protein kinase B,AKT)、p-PI3K、p-AKT、Bcl-2和Bcl-2相关X蛋白(Bcl-2 associated X protein,Bax)的表达。结果过表达DJ-1后能明显降低中细胞凋亡率和血清中TNF-α和IL-6的含量,上调海马区5-HT、5-HIAA、DA的水平,上调p-PI3K、p-AKT和Bcl-2的表达,抑制Bax的表达,但PI3K抑制剂LY294002可部分解除过表达DJ-1对神经元细胞的保护作用。结论过表达DJ-1后能明显抑制抑郁症大鼠炎症性应激,降低细胞的凋亡率,上调中5-HT、5-HIAA和DA的含量,这可能与激活PI3K/AKT信号有关。 展开更多
关键词 DJ-1蛋白 抑郁症 神经递质 磷脂酰肌醇3激酶/蛋白激酶B信号
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GSK3/Nrf2调控的生物节律在机体衰老中的规律
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作者 陈伊琳 蒋晓波 +1 位作者 屈红林 刘瑞莲 《中国组织工程研究》 CAS 北大核心 2025年第6期1257-1264,共8页
背景:生物节律(昼夜节律)紊乱是一个典型的与衰老有关的问题,维持生物节律的正常运作可能是一种很有前景的抗衰老策略。核转录因子NF-E2相关因子2的表达具有生物节律;糖原合成酶激酶3系统代表了一个“调节阀”,它控制核转录因子NF-E2相... 背景:生物节律(昼夜节律)紊乱是一个典型的与衰老有关的问题,维持生物节律的正常运作可能是一种很有前景的抗衰老策略。核转录因子NF-E2相关因子2的表达具有生物节律;糖原合成酶激酶3系统代表了一个“调节阀”,它控制核转录因子NF-E2相关因子2水平的细微振荡。抗氧化基因转录水平的昼夜变化可以影响生物体对氧化应激的反应,但是糖原合成酶激酶3/NF-E2相关因子2在调节机体衰老中的具体分子机制仍令人困惑。目的:拟通过对该领域文献的回顾,寻找糖原合成酶激酶3/核转录因子NF-E2相关因子2调控的生物节律在机体衰老中的一般规律。方法:文献资料法通过对有关“糖原合成酶激酶3、核转录因子NF-E2相关因子2、生物节律以及衰老”等相关文献进行检索、查阅和筛选,为全文的分析奠定理论基础。对比分析法通过对所得到文献进行阅读分析,比较文献之间的异同点,为论点提供合理的理论支撑。通过对文献的进一步对比分析,理清相关指标间的关系,为全文的分析明确思路。结果与结论:①糖原合成酶激酶3可通过对节律基因的调节间接调控核转录因子NF-E2相关因子2的表达;②糖原合成酶激酶3和核转录因子NF-E2相关因子2是抗衰老程序的组成部分,且与生物节律相关;③并且糖原合成酶激酶3/核转录因子NF-E2相关因子2参与多种代谢途径,包括与衰老相关疾病(2型糖尿病和癌症)和神经退行性疾病相关的代谢途径。 展开更多
关键词 糖原合成酶激酶3 核转录因子NF-E2相关因子2 生物节律 衰老 神经退行性疾病
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PI3K/AKT signaling and neuroprotection in ischemic stroke:molecular mechanisms and therapeutic perspectives
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作者 Tianlong Liu Xiaolin Li +4 位作者 Xiaowei Zhou Wei Chen Aidong Wen Minna Liu Yi Ding 《Neural Regeneration Research》 SCIE CAS 2025年第10期2758-2775,共18页
It has been reported that the PI3K/AKT signaling pathway plays a key role in the pathogenesis of ischemic stroke.As a result,the development of drugs targeting the PI3K/AKT signaling pathway has attracted increasing a... It has been reported that the PI3K/AKT signaling pathway plays a key role in the pathogenesis of ischemic stroke.As a result,the development of drugs targeting the PI3K/AKT signaling pathway has attracted increasing attention from researchers.This article reviews the pathological mechanisms and advancements in research related to the signaling pathways in ischemic stroke,with a focus on the PI3K/AKT signaling pathway.The key findings include the following:(1)The complex pathological mechanisms of ischemic stroke can be categorized into five major types:excitatory amino acid toxicity,Ca^(2+)overload,inflammatory response,oxidative stress,and apoptosis.(2)The PI3K/AKT-mediated signaling pathway is closely associated with the occurrence and progression of ischemic stroke,which primarily involves the NF-κB,NRF2,BCL-2,mTOR,and endothelial NOS signaling pathways.(3)Natural products,including flavonoids,quinones,alkaloids,phenylpropanoids,phenols,terpenoids,and iridoids,show great potential as candidate substances for the development of innovative anti-stroke medications.(4)Recently,novel therapeutic techniques,such as electroacupuncture and mesenchymal stem cell therapy,have demonstrated the potential to improve stroke outcomes by activating the PI3K/AKT signaling pathway,providing new possibilities for the treatment and rehabilitation of patients with ischemic stroke.Future investigations should focus on the direct regulatory mechanisms of drugs targeting the PI3K/AKT signaling pathway and their clinical translation to develop innovative treatment strategies for ischemic stroke. 展开更多
关键词 apoptosis autophagy inflammation ischemic stroke NEUROPROTECTION oxidative stress PATHOGENESIS phosphatidylinositol 3-kinase protein kinase B THERAPEUTICS
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Human neural stem cell-derived extracellular vesicles protect against ischemic stroke by activating the PI3K/AKT/mTOR pathway
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作者 Jiayi Wang Mengke Zhao +5 位作者 Dong Fu Meina Wang Chao Han Zhongyue Lv Liang Wang Jing Liu 《Neural Regeneration Research》 SCIE CAS 2025年第11期3245-3258,共14页
Human neural stem cell-derived extracellular vesicles exhibit analogous functions to their parental cells,and can thus be used as substitutes for stem cells in stem cell therapy,thereby mitigating the risks of stem ce... Human neural stem cell-derived extracellular vesicles exhibit analogous functions to their parental cells,and can thus be used as substitutes for stem cells in stem cell therapy,thereby mitigating the risks of stem cell therapy and advancing the frontiers of stem cell-derived treatments.This lays a foundation for the development of potentially potent new treatment modalities for ischemic stroke.However,the precise mechanisms underlying the efficacy and safety of human neural stem cell-derived extracellular vesicles remain unclear,presenting challenges for clinical translation.To promote the translation of therapy based on human neural stem cell-derived extracellular vesicles from the bench to the bedside,we conducted a comprehensive preclinical study to evaluate the efficacy and safety of human neural stem cell-derived extracellular vesicles in the treatment of ischemic stroke.We found that administration of human neural stem cell-derived extracellular vesicles to an ischemic stroke rat model reduced the volume of cerebral infarction and promoted functional recovery by alleviating neuronal apoptosis.The human neural stem cell-derived extracellular vesicles reduced neuronal apoptosis by enhancing phosphorylation of phosphoinositide 3-kinase,mammalian target of rapamycin,and protein kinase B,and these effects were reversed by treatment with a phosphoinositide 3-kinase inhibitor.These findings suggest that human neural stem cell-derived extracellular vesicles play a neuroprotective role in ischemic stroke through activation of phosphoinositide 3-kinase/protein kinase B/mammalian target of rapamycin signaling pathway.Finally,we showed that human neural stem cell-derived extracellular vesicles have a good in vivo safety profile.Therefore,human neural stem cell-derived extracellular vesicles are a promising potential agent for the treatment of ischemic stroke. 展开更多
关键词 behavior EXOSOME extracellular vesicles ischemic stroke mammalian target of rapamycin(mTOR) middle cerebral artery occlusion neural stem cells neuronal apoptosis phosphoinositide 3-kinase(PI3K) protein kinase B(AKT)
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血清PKM2、Gal-3、CitH3水平升高可预测机械通气并发肺部感染
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作者 黄航栋 厉丹瑜 朱晓锋 《基础医学与临床》 CAS 2025年第1期86-90,共5页
目的探讨血清丙酮酸激酶M2(PKM2)、乳糖凝集素-3(Gal-3)、瓜氨酸化组蛋白H3(CitH3)水平与机械通气(MV)患者并发肺部感染的关系及预后评估价值。方法将2022年10月至2024年3月于金华市中心医院收治的120例行MV的患者纳入研究,根据是否并... 目的探讨血清丙酮酸激酶M2(PKM2)、乳糖凝集素-3(Gal-3)、瓜氨酸化组蛋白H3(CitH3)水平与机械通气(MV)患者并发肺部感染的关系及预后评估价值。方法将2022年10月至2024年3月于金华市中心医院收治的120例行MV的患者纳入研究,根据是否并发肺部感染分为肺部感染组(n=50)和非肺部感染组(n=70),ELISA检测血清PKM2、Gal-3、CitH3水平;收集临床资料;预后随访并分为预后良好组(n=79)和预后不良组(n=41);多因素Logistic回归分析影响MV患者发生预后不良的因素;受试者工作特征(ROC)曲线分析血清PKM2、Gal-3、CitH3对MV患者发生预后不良的预测价值。结果与非肺部感染组相比,肺部感染组血清PKM2、Gal-3、CitH3水平均升高(P<0.05);与预后良好组相比,预后不良组血清PKM2、Gal-3、CitH3水平均升高(P<0.05);预后不良组较预后良好组临床肺部感染评分(CPIS)升高(P<0.05);PKM2、Gal-3、CitH3皆为MV患者发生预后不良的危险因素(P<0.05);PKM2、Gal-3、CitH3及联合预测患者发生预后不良的曲线下面积(AUC)分别为0.712、0.839、0.779、0.925,3者联合诊断的AUC优于各自单独检测(Z=4.261、2.521、3.676,P<0.001、0.05、0.001)。结论MV并发肺部感染患者血清PKM2、Gal-3、CitH3水平均较未发生肺部感染患者升高,三者对MV患者发生预后不良有一定的预测价值。 展开更多
关键词 机械通气 肺部感染 丙酮酸激酶M2(PKM2) 乳糖凝集素-3(Gal-3) 瓜氨酸化组蛋白H3(CitH3) 预后
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miR-212-3p靶向MAPK3调控骨髓间充质干细胞的衰老
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作者 钟丽颖 李顺东 王聪 《中国组织工程研究》 CAS 北大核心 2025年第13期2690-2697,共8页
背景:骨质疏松症患者的骨髓间充质干细胞表现出明显衰老状态,并且细胞活性及成骨分化水平显著降低。miR-212-3p能够抑制人骨髓间充质干细胞的成骨分化,但其对骨髓间充质干细胞衰老调控的作用及机制尚不明确。目的:研究miR-212-3p通过靶... 背景:骨质疏松症患者的骨髓间充质干细胞表现出明显衰老状态,并且细胞活性及成骨分化水平显著降低。miR-212-3p能够抑制人骨髓间充质干细胞的成骨分化,但其对骨髓间充质干细胞衰老调控的作用及机制尚不明确。目的:研究miR-212-3p通过靶向丝裂原活化蛋白激酶3(mitogen-activated protein kinase 3,MAPK3)对骨髓间充质干细胞衰老的影响及其机制。方法:体外分离培养大鼠骨髓间充质干细胞,收集第3代进行以下实验:①分2组培养:对照组加入完全培养基,造模组加入含H_(2)O_(2)的完全培养基培养,培养72 h后,检测细胞中β-半乳糖苷酶活性、miR-212-3p和MAPK3 mRNA表达,以及MAPK3、p16和p21蛋白表达。②分3组培养:对照组、抑制物对照组、miR-212-3p抑制物组,转染24 h后,检测细胞中miR-212-3p、MAPK3 mRNA表达及MAPK3蛋白表达。③采用双荧光素酶报告基因联合qRT-PCR和Western blot验证miR-212-3p与MAPK3靶向调控作用。④分组培养:分为对照抑制物组、miR-212-3p抑制物组、miR-212-3p抑制物+干扰对照组、miR-212-3p抑制物+MAPK3干扰组,转染24 h后,检测细胞中MAPK蛋白与mRNA表达。分为对照组、H_(2)O_(2)组、H_(2)O_(2)+对照抑制物组、H_(2)O_(2)+miR-212-3p抑制物组、H_(2)O_(2)+miR-212-3p抑制物+干扰对照组、H_(2)O_(2)+miR-212-3p抑制物+MAPK3干扰组,细胞转染24 h后再加入H_(2)O_(2)培养72 h,检测细胞中衰老相关β-半乳糖苷酶活性、p16和p21蛋白表达。结果与结论:①与对照组比较,造模组β-半乳糖苷酶活性、miR-212-3p mRNA表达及p16、p21蛋白表达升高(P<0.05),MAPK3 mRNA和蛋白表达降低(P<0.05)。②与对照组比较,miR-212-3p抑制物组细胞中miR-212-3p mRNA表达降低(P<0.05),MAPK3 mRNA与蛋白表达升高(P<0.05)。③双荧光素酶报告基因实验证实,MAPK3是miR-212-3p下游靶基因。④与对照抑制物组比较,miR-212-3p抑制物组细胞中MAPK3 mRNA和蛋白表达升高(P<0.05);与miR-212-3p抑制物组比较,miR-212-3p抑制物+MAPK3干扰组细胞中MAPK3 mRNA和蛋白表达降低(P<0.05)。与H_(2)O_(2)+对照抑制物组比较,H_(2)O_(2)+miR-212-3p抑制物组β-半乳糖苷酶活性降低(P<0.05);与H_(2)O_(2)+miR-212-3p抑制物组比较,H_(2)O_(2)+miR-212-3p抑制物+MAPK3干扰组β-半乳糖苷酶活性升高(P<0.05)。与H_(2)O_(2)+对照抑制物组比较,H_(2)O_(2)+miR-212-3p抑制物组细胞中p16和p21蛋白表达降低(P<0.05);与H_(2)O_(2)+miR-212-3p抑制物组比较,H_(2)O_(2)+miR-212-3p抑制物+MAPK3干扰组细胞中p16和p21蛋白表达升高(P<0.05)。⑤结果表明,下调miR-212-3p可抑制大鼠骨髓间充质干细胞衰老,其作用机制可能是通过靶向上调MAPK3表达实现的。 展开更多
关键词 骨髓间充质干细胞 细胞衰老 miR-212-3p 丝裂原活化蛋白激酶3 Β-半乳糖苷酶
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山奈酚在H_(2)O_(2)诱导的人晶状体上皮细胞氧化损伤及凋亡中的作用与机制研究
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作者 李亚楠 孙朝晖 +3 位作者 王海燕 左建霞 赵娴 刘明琦 《眼科新进展》 CAS 北大核心 2025年第1期22-26,共5页
目的探究山奈酚在过氧化氢(H_(2)O_(2))诱导的人晶状上皮细胞氧化损伤、凋亡中的作用,以及对Janus蛋白酪氨酸激酶2/信号转导与激活因子3(JAK2/STAT3)信号通路的调控作用。方法体外培养人晶状上皮细胞HLE-B3并分为:空白组(不做干预处理)... 目的探究山奈酚在过氧化氢(H_(2)O_(2))诱导的人晶状上皮细胞氧化损伤、凋亡中的作用,以及对Janus蛋白酪氨酸激酶2/信号转导与激活因子3(JAK2/STAT3)信号通路的调控作用。方法体外培养人晶状上皮细胞HLE-B3并分为:空白组(不做干预处理)、模型组(400μmol·L^(-1) H_(2)O_(2))、山奈酚组(400μmol·L^(-1) H_(2)O_(2)+40μmol·L^(-1)山奈酚)、AG490组(400μmol·L^(-1) H_(2)O_(2)+50μmol·L^(-1) JAK2/STAT3信号通路抑制剂AG490)、抑制剂组(400μmol·L^(-1) H_(2)O_(2)+40μmol·L^(-1)山奈酚+50μmol·L^(-1) AG490)和激活剂组(400μmol·L^(-1) H_(2)O_(2)+40μmol·L^(-1)山奈酚+0.5μmol·L^(-1) JAK2/STAT3信号通路激活剂C-A1)。干预24 h后,采用Hoechst 33258染色法测定细胞凋亡率;丙二醛(MDA)和超氧化物歧化酶(SOD)试剂盒检测MDA、SOD水平;Western blot测定半胱氨酸天冬氨酸蛋白酶-3(Caspase-3)、B淋巴细胞瘤-2(Bcl-2)、JAK2、STAT3、磷酸化JAK2(p-JAK2)和磷酸化STAT3(p-STAT3)蛋白表达水平。结果与空白组相比,模型组细胞凋亡率、MDA、Caspase-3及p-JAK2、p-STAT3蛋白表达水平均升高(均为P<0.05),SOD和Bcl-2蛋白表达水平均降低(均为P<0.05)。与模型组相比,山奈酚组和AG490组细胞凋亡率、MDA、Caspase-3及p-JAK2、p-STAT3蛋白表达水平均降低(均为P<0.05),SOD和Bcl-2蛋白表达水平均升高(均为P<0.05)。与山奈酚组相比,抑制剂组细胞凋亡率、MDA、Caspase-3及p-JAK2、p-STAT3蛋白表达水平均降低,SOD和Bcl-2蛋白表达水平均升高(均为P<0.05);激活剂组细胞凋亡率、MDA、Caspase-3及p-JAK2、p-STAT3蛋白表达水平均升高,SOD和Bcl-2蛋白表达水平均降低(均为P<0.05)。结论山奈酚能够通过抑制JAK2/STAT3信号通路发挥减轻H_(2)O_(2)诱导的HLE-B3细胞氧化损伤的作用,并抑制细胞凋亡。 展开更多
关键词 白内障 晶状体上皮细胞 山奈酚 过氧化氢 JAK2/STAT3通路 氧化损伤 凋亡
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香菇C_(91-3)转录本Unigene14872基因Pkinase结构域的克隆表达及其生物信息学分析 被引量:2
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作者 杜忠娟 钟民涛 +7 位作者 伦永志 刘奔 张伟 王晓丽 李星云 曹靖 宁安红 黄敏 《微生物学杂志》 CAS CSCD 2014年第1期22-27,共6页
旨在克隆香菇C91-3转录本Unigene 14872基因中的Pkinase结构域,并对其进行生物信息学分析。提取香菇C91-3菌丝体中总RNA,根据转录组测序结果,用3'-Full RACE、5'-Full RACE方法获得Unigene 14872基因全长。用NCBI对其进行生物... 旨在克隆香菇C91-3转录本Unigene 14872基因中的Pkinase结构域,并对其进行生物信息学分析。提取香菇C91-3菌丝体中总RNA,根据转录组测序结果,用3'-Full RACE、5'-Full RACE方法获得Unigene 14872基因全长。用NCBI对其进行生物信息学分析,预测其具有丝氨酸/苏氨酸蛋白激酶(Pkinase)结构域。设计引物PCR扩增Pkinase结构域,然后克隆至pET32a(+)载体,再热转化至JM109中保存并进行质粒测序。重组质粒pET32a(+)-Pkinase构建成功,并成功诱导表达重组蛋白,初步鉴定该蛋白具有抗肿瘤活性,为进一步研究重组蛋白的活性及作用机制奠定基础。 展开更多
关键词 香菇C91-3 克隆 生物信息学 蛋白激酶
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Mismatched effects of receptor interacting protein kinase-3 on hepatic steatosis and inflammation in nonalcoholic fatty liver disease 被引量:7
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作者 Waqar Khalid Saeed Dae Won Jun +5 位作者 Kiseok Jang Sang Bong Ahn Ju Hee Oh Yeon Ji Chae Jai Sun Lee Hyeon Tae Kang 《World Journal of Gastroenterology》 SCIE CAS 2018年第48期5477-5490,共14页
AIM To validate the effects of receptor interacting protein kinase-3(RIP3) deletion in non-alcoholic fatty liver disease(NAFLD) and to clarify the mechanism of action.METHODS Wild-type(WT) and RIP3 knockout(KO) mice w... AIM To validate the effects of receptor interacting protein kinase-3(RIP3) deletion in non-alcoholic fatty liver disease(NAFLD) and to clarify the mechanism of action.METHODS Wild-type(WT) and RIP3 knockout(KO) mice werefed normal chow and high fat(HF) diets for 12 wk. The body weight was assessed once weekly. After 12 wk, the liver and serum samples were extracted. The liver tissue expression levels of RIP3, microsomal triglyceride transfer protein, protein disulfide isomerase, apolipoprotein-B, X-box binding protein-1, sterol regulatory element-binding protein-1c, fatty acid synthase, cluster of differentiation-36, diglyceride acyltransferase, peroxisome proliferator-activated receptor alpha, tumor necrosis factor-alpha(TNF-α), and interleukin-6 were assessed. Oleic acid treated primary hepatocytes from WT and RIP3 KO mice were stained with Nile red. The expression of inflammatory cytokines, including chemokine(C-X-C motif) ligand(CXCL) 1, CXCL2, and TNF-α, in monocytes was evaluated.RESULTS RIP3 KO HF diet fed mice showed a significant gain in body weight, and liver weight, liver to body weight ratio, and liver triglycerides were increased in HF diet fed RIP3 KO mice compared to HF diet fed WT mice. RIP3 KO primary hepatocytes also had increased intracellular fat droplets compared to WT primary hepatocytes after oleic acid treatment. RIP3 overexpression decreased hepatic fat content. Quantitative real-time polymerase chain reaction analysis showed that the expression of very-low-density lipoproteins secretion markers(microsomal triglyceride transfer protein, protein disulfide isomerase, and apolipoprotein-B) was significantly suppressed in RIP3 KO mice. The overall NAFLD Activity Score was the same between WT and RIP3 KO mice; however, RIP3 KO mice had increased fatty change and decreased lobular inflammation compared to WT mice. Inflammatory signals(CXCL1/2, TNF-α, and interleukin-6) increased after lipopolysaccharide and pancaspase inhibitor(necroptotic condition) treatment in monocytes. Neutrophil chemokines(CXCL1, and CXCL2) were decreased, and TNF-α was increased after RIP3 inhibitor treatment in monocytes.CONCLUSION RIP3 deletion exacerbates steatosis, and partially inhibits inflammation in the HF diet induced NAFLD model. 展开更多
关键词 NECROPTOSIS RECEPTOR interacting PROTEIN kinase-3 Mixed LINEAGE kinase domain-like PROTEIN Non-alcoholic fatty liver disease STEATOSIS
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Fenofibrate Pre-treatment Suppressed Inflammation by Activating Phosphoinositide 3 Kinase/Protein Kinase B(PI3K/Akt) Signaling in Renal Ischemia-Reperfusion Injury 被引量:8
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作者 杨凤杰 何永华 周建华 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2015年第1期58-63,共6页
The aim of this study was to investigate the possible beneficial effects of Fenofibrate on renal ischemia-reperfusion injury(IRI) in mice and its potential mechanism. IRI was induced by bilateral renal ischemia for ... The aim of this study was to investigate the possible beneficial effects of Fenofibrate on renal ischemia-reperfusion injury(IRI) in mice and its potential mechanism. IRI was induced by bilateral renal ischemia for 60 min followed by reperfusion for 24 h. Eighteen male C57BL/6 mice were randomly divided into three groups: sham-operated group(sham), IRI+saline group(IRI group), IRI+Fenofibrate(FEN) group. Normal saline or Fenofibrate(3 mg/kg) was intravenously injected 60 min before renal ischemia in IRI group and FEN group, respectively. Blood samples and renal tissues were collected at the end of reperfusion. The renal function, histopathologic changes, and the expression levels of pro-inflammatory cytokines [interleukin-8(IL-8), tumor necrosis factor alpha(TNF-α) and IL-6] in serum and renal tissue homogenate were assessed. Moreover, the effects of Fenofibrate on activating phosphoinositide 3 kinase/protein kinase B(PI3K/Akt) signaling and peroxisome proliferator-activated receptor-α(PPAR-α) were also measured in renal IRI. The results showed that plasma levels of blood urea nitrogen and creatinine, histopathologic scores and the expression levels of TNF-α, IL-8 and IL-6 were significantly lower in FEN group than in IRI group. Moreover, Fenofibrate pretreatment could further induce PI3K/Akt signal pathway and PPAR-α activation following renal IRI. These findings indicated PPAR-α activation by Fenofibrate exerts protective effects on renal IRI in mice by suppressing inflammation via PI3K/Akt activation. Thus, Fenofibrate could be a novel therapeutic alternative in renal IRI. 展开更多
关键词 FENOFIBRATE renal ischemia/reperfusion injury activating phosphoinositide 3 kinase/protein kinase B INFLAMMATION
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Signal transducer and activator of transcription 3 promotes the Warburg effect possibly by inducing pyruvate kinase M2 phosphorylation in liver precancerous lesions 被引量:8
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作者 Yang-Hui Bi Wen-Qi Han +4 位作者 Ruo-Fei Li Yun-Jiao Wang Zun-Shu Du Xue-Jiang Wang Ying Jiang 《World Journal of Gastroenterology》 SCIE CAS 2019年第16期1936-1949,共14页
BACKGROUND Study shows that signal transducer and activator of transcription 3(STAT3) can increase the Warburg effect by stimulating hexokinase 2 in breast cancer and upregulate lactate dehydrogenase A and pyruvate de... BACKGROUND Study shows that signal transducer and activator of transcription 3(STAT3) can increase the Warburg effect by stimulating hexokinase 2 in breast cancer and upregulate lactate dehydrogenase A and pyruvate dehydrogenase kinase 1 in myeloma. STAT3 and pyruvate kinase M2(PKM2) can also be activated and enhance the Warburg effect in hepatocellular carcinoma. Precancerous lesions are critical to human and rodent hepatocarcinogenesis. However, the underlying molecular mechanism for the development of liver precancerous lesions remains unknown. We hypothesized that STAT3 promotes the Warburg effect possibly by upregulating p-PKM2 in liver precancerous lesions in rats.AIM To investigate the mechanism of the Warburg effect in liver precancerous lesions in rats.METHODS A model of liver precancerous lesions was established by a modified Solt-Farber method. The liver pathological changes were observed by HE staining and immunohistochemistry. The transformation of WB-F344 cells induced with Nmethyl-N'-nitro-N-nitrosoguanidine and hydrogen peroxide was evaluated by the soft agar assay and aneuploidy. The levels of glucose and lactate in the tissue and culture medium were detected with a spectrophotometer. The protein levels of glutathione S-transferase-π, proliferating cell nuclear antigen(PCNA), STAT3,and PKM2 were examined by Western blot and immunofluorescence.RESULTS We found that the Warburg effect was increased in liver precancerous lesions in rats. PKM2 and p-STAT3 were upregulated in activated oval cells in liverprecancerous lesions in rats. The Warburg effect, p-PKM2, and p-STAT3 expression were also increased in transformed WB-F344 cells. STAT3 activation promoted the clonal formation rate, aneuploidy, alpha-fetoprotein expression,PCNA expression, G1/S phase transition, the Warburg effect, PKM2 phosphorylation, and nuclear translocation in transformed WB-F344 cells.Moreover, the Warburg effect was inhibited by stattic, a specific inhibitor of STAT3, and further reduced in transformed WB-F344 cells after the intervention for PKM2.CONCLUSION The Warburg effect is initiated in liver precancerous lesions in rats. STAT3 activation promotes the Warburg effect by enhancing the phosphorylation of PKM2 in transformed WB-F344 cells. 展开更多
关键词 WARBURG effect Hepatic PROGENITOR cell Signal transducer and activator of transcription 3 PYRUVATE kinase M2 LIVER PRECANCEROUS lesion
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Neuroprotective mechanisms of rutin for spinal cord injury through anti-oxidation and anti-inflammation and inhibition of p38 mitogen activated protein kinase pathway 被引量:10
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作者 Hong-liang Song Xiang Zhang +5 位作者 Wen-zhao Wang Rong-han Liu Kai Zhao Ming-yuan Liu Wei-ming Gong Bin Ning 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第1期128-134,共7页
Rutin has anti-inflammatory, antioxidant, anti-viral, anti-tumor and immune regulatory effects. However, the neuroprotective effects of rutin in spinal cord injury are unknown. The p38 mitogen activated protein kinase... Rutin has anti-inflammatory, antioxidant, anti-viral, anti-tumor and immune regulatory effects. However, the neuroprotective effects of rutin in spinal cord injury are unknown. The p38 mitogen activated protein kinase (p38 MAPK) pathway is the most important member of the MAPK family that controls inflammation. We assumed that the mechanism of rutin in the repair of spinal cord injury is associated with the inhibition of p38 MAPK pathway. Allen’s method was used to establish a rat model of spinal cord injury. The rat model was intraperitoneally injected with rutin (30 mg/kg) for 3 days. After treatment with rutin, Basso, Beattie and Bresnahan locomotor function scores increased. Water content, tumor necrosis factor alpha, interleukin 1 beta, and interleukin 6 levels, p38 MAPK protein expression and caspase-3 and -9 activities in T8–9 spinal cord decreased. Oxidative stress related markers superoxide dismutase and glutathione peroxidase levels increased in peripheral blood. Rutin exerts neuroprotective effect through anti-oxidation, anti-inflammation, anti-apoptosis and inhibition of p38 MAPK pathway. 展开更多
关键词 nerve regeneration spinal cord injury RUTIN oxidative stress antioxidant ANTI-INFLAMMATION p38 mitogen activated protein kinase pathway ANTI-APOPTOSIS caspase-3 caspase-9 neural regeneration
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Expression of phosphatidylinositol-3 kinase and effects of inhibitor Wortmannin on expression of tumor necrosis factor-α in severe acute pancreatitis associated with acute lung injury 被引量:19
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作者 Ming Wei Yan-jie Gong +3 位作者 Ling Tu Jia Li Ying-hong Liang Yi-hua Zhang 《World Journal of Emergency Medicine》 CAS 2015年第4期299-304,共6页
BACKGROUND: Acute lung injury(ALI) is a common and serious complication of severe acute pancreatitis(SAP). The study aimed to investigate the protective effect and mechanism of phosphatidylinositol-3 kinase(PI3K) inhi... BACKGROUND: Acute lung injury(ALI) is a common and serious complication of severe acute pancreatitis(SAP). The study aimed to investigate the protective effect and mechanism of phosphatidylinositol-3 kinase(PI3K) inhibitor Wortmannin in SAP associated with ALI.METHODS: Ninety rats were randomly divided into three groups: sham operation(SO) group(n=30), SAP group(n=30), and SAP+Wortmannin(SAP+W) group(n=30). SAP model was induced by retrograde injection of 4% sodium taurocholate into the biliopancreatic duct of rats. The rate of lung water content, myeloperoxidase(MPO), matrix metalloproteinase 9(MMP-9), protein kinase B(PKB), abdphosphorylation of protein kinase B(P-PKB) activity in the lung tissue were evaluated.RESULTS: In the SAP group, the p-PKB expression in the lung tissue began to rise at 3 hours after modeling, and peaked at 12 hours(P<0.05); the rate of lung water content, MPO and TNF-α activity were also gradually increased, and the degree of lung lesion gradually increased(P<0.05). In the SAP+Wortmannin group, the p-PKB expression in the lung tissue began to rise at 3 hours after modeling, and peaked at 12 hours; it was higher than that in the SO group(P<0.05), but significantly lower than that in the SAP group(P<0.05). The rest indicators in the SAP+Wortmannin group were also significantly decreased as compared with the SAP group(P<0.05).CONCLUSIONS: The expression of phosphatidylinositol-3 kinase/protein kinase B was elevated in severe pancreatitis rats with lung injury. This suggested that PI3 K signal transduction pathway is involved in the control and release of proinfl ammatory cytokines TNF-α, which may play an important role in the pathogenesis of severe acute pancreatitis associated with lung injury. This finding indicated that Wortmannin can block the PI3 K signal transduction pathway, and inhibit the release of infl ammatory factor TNF-α. 展开更多
关键词 WORTMANNIN Phosphatidylinositol-3 kinase/protein kinase B Severe acute pancreatitis Acute lung injury
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Protective effects of panax notoginseng saponin on dextran sulfate sodium-induced colitis in rats through phosphoinositide-3-kinase protein kinase B signaling pathway inhibition 被引量:5
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作者 Qing-Ge Lu Li Zeng +4 位作者 Xiao-Hai Li Yu Liu Xue-Feng Du Guo-Min Bai Xin Yan 《World Journal of Gastroenterology》 SCIE CAS 2020年第11期1156-1171,共16页
BACKGROUND Intestinal inflammation is a common digestive tract disease, which is usually treated with hormone medicines. Hormone medicines are effective to some extent, but long-term use of them may bring about many c... BACKGROUND Intestinal inflammation is a common digestive tract disease, which is usually treated with hormone medicines. Hormone medicines are effective to some extent, but long-term use of them may bring about many complications.AIM To explore the protective effects of panax notoginseng saponin(PNS) against dextran sulfate sodium(DSS)-induced intestinal inflammatory injury through phosphoinositide-3-kinase protein kinase B(PI3K/AKT) signaling pathway inhibition in rats.METHODS Colitis rat models were generated via DSS induction, and rats were divided into control(no modeling), DSS, DSS + PNS 50 mg/k, and DSS + PNS 100 mg/kg groups. Then, the intestinal injury, oxidative stress parameters, inflammatory indices, tight junction proteins, apoptosis, macrophage polarization, and TLR4/AKT signaling pathway in colon tissues from rats in each of the groups were detected. The PI3 K/AKT signaling pathway in the colon tissue of rats was blocked using the PI3K/AKT signaling pathway inhibitor, LY294002.RESULTS Compared with rats in the control group, rats in the DSS group showed significantly shortened colon lengths, and significantly increased disease activity indices, oxidative stress reactions and inflammatory indices, as well as significantly decreased expression of tight junction-associated proteins. In addition, the DSS group showed significantly increased apoptotic cell numbers,and showed significantly increased M1 macrophages in spleen and colon tissues.They also showed significantly decreased M2 macrophages in colon tissues, as well as activation of the PI3K/AKT signaling pathway(all P < 0.05). Compared with rats in the DSS group, rats in the DSS + PNS group showed significantly lengthened colon lengths, decreased disease activity indices, and significantly alleviated oxidative stress reactions and inflammatory responses. In addition, this group showed significantly increased expression of tight junction-associated proteins, significantly decreased apoptotic cell numbers, and significantly decreased M1 macrophages in spleen and colon tissues. This group further showed significantly increased M2 macrophages in colon tissues, and significantly suppressed activation of the PI3K/AKT signaling pathway, as well as a dose dependency(all P < 0.05). When the PI3K/AKT signaling pathway was inhibited, the apoptosis rate of colon tissue cells in the DSS + LY294002 group was significantly lower than that of the DSS group(P < 0.05).CONCLUSION PNS can protect rats against DSS-induced intestinal inflammatory injury by inhibiting the PI3K/AKT signaling pathway, and therefore may be potentially used in the future as a drug for colitis. 展开更多
关键词 Panax notoginseng SAPONIN Phosphoinositide-3-kinase protein kinase B signaling pathway Dextran sulfate sodium COLITIS Rat intestine Protective effect
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Triptolide (PG-490) induces apoptosis of dendritic cells through sequential p38 MAP kinase phosphorylation and caspase 3 activation 被引量:41
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作者 LiuQ ChenT ChenH ZhangM LiN LuZ MaP CaoX 《第二军医大学学报》 CAS CSCD 北大核心 2004年第9期939-939,共1页
Dendritic cells (DCs) are the most potent antigen-presen ting cells that play crucial roles in the regulation of immune response. Triptol ide, an active component purified from the medicinal plant Tripterygium wilfor ... Dendritic cells (DCs) are the most potent antigen-presen ting cells that play crucial roles in the regulation of immune response. Triptol ide, an active component purified from the medicinal plant Tripterygium wilfor dii Hook F., has been demonstrated to act as a potent immunosuppressive drug c apab le of inhibiting T cell activation and proliferation. However, little is known a bout the effects of triptolide on DCs. The present study shows that triptolide d oes not affect phenotypic differentiation and LPS-induced maturation of murine DCs. But triptolide can dramatically reduce cell recovery by inducing apoptosis of DCs at concentration as low as 10 ng/ml, as demonstrated by phosphatidylserin e exposure, mitochondria potential decrease, and nuclear DNA condensation. Tript olide induces activation of p38 in DCs, which precedes the activation of caspase 3. SB203580, a specific kinase inhibitor for p38, can block the activation of caspase 3 and inhibit the resultant apoptosis of DCs. Our results suggest that t he anti-inflammatory and immunosuppressive activities of triptolide may be due, in part, to its apoptosis-inducing effects on DCs. 展开更多
关键词 PG-490 MAP kinase phosphorylation and caspase 3 activation TRIPTOLIDE
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Neural stem cell transplantation in the hippocampus of rats with cerebral ischemia/reperfusion injury Activation of the phosphatidylinositol-3 kinase/Akt pathway and increased brain-derived neurotrophic factor expression 被引量:4
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作者 Yu Zhao Shengtao Yao Shijun Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2010年第21期1605-1610,共6页
The phosphatidylinositol-3 kinase (PI3K)/Akt pathway and brain-derived neurotrophic factor (BDNF) are involved in neurological functional recovery following cerebral ischemia. Therefore, we hypothesized that mecha... The phosphatidylinositol-3 kinase (PI3K)/Akt pathway and brain-derived neurotrophic factor (BDNF) are involved in neurological functional recovery following cerebral ischemia. Therefore, we hypothesized that mechanisms of neuroprotection by transplantation of neural stem cells (NSCs) on cerebral ischemia contributed to activation of the PI3K/Akt pathway and enhanced BDNF expression. In the present study, Wortmannin (a specific, covalent inhibitor of PI3K) was administered adjacent to ischemic hippocampus by stereotactic transplantation to further confirm the neuroprotective mechanisms of NSC transplantation following cerebral ischemia. Results showed that focal infarct volume was significantly smaller in the NSCs group, but the neurological behavior score in the NSC group was significantly greater than the middle cerebral artery occlusion model group, Wortmannin treatment group, and NSCs + Wortmannin treatment group. Protein expression of BDNF was significantly greater in the NSC group compared with the Wortmannin treatment group and NSCs + Wortmannin treatment group. These results suggest that the neuroprotective role of NSC transplantation in the cerebral ischemia activated the PI3K/Akt pathway and upregulated BDNF expression in lesioned brains. 展开更多
关键词 neural stem cells phosphatidylinositol-3 kinase brain-derived neurotrophic factor cerebral ischemia
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