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Salidroside attenuates oxygen and glucose deprivation-induced neuronal injury by inhibiting ferroptosis
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作者 Ying-Zhi Li Ai-Ping Wu +2 位作者 Dan-Dan Wang Pan-Pan Yang Bin Sheng 《Asian Pacific Journal of Tropical Biomedicine》 SCIE CAS 2023年第2期70-79,共10页
Objective: To evaluate the effect of salidroside on oxygen and glucose deprivation(OGD)-treated NT2 cells and its underlying mechanisms of action.Methods: Retinoic acid was used to induce the differentiation of NT2 ce... Objective: To evaluate the effect of salidroside on oxygen and glucose deprivation(OGD)-treated NT2 cells and its underlying mechanisms of action.Methods: Retinoic acid was used to induce the differentiation of NT2 cells into neurons. The effects of salidroside on survival, apoptosis, inflammatory response, and oxidative stress of neurons undergoing OGD were evaluated. Using precursor cells as controls, the effect of salidroside on the differentiation progression of OGDtreated cells was evaluated. In addition, the effect of erastin, a ferroptosis inducer, on NT2 cells was examined to investigate the underlying mechanisms of neuroprotective action of salidroside.Results: Salidroside alleviated the effects of OGD on neuronal survival, apoptosis, inflammation, and oxidative stress, and promoted NT2 cell differentiation. Moreover, salidroside prevented ferroptosis of OGD-treated cells, which was abolished following erastin treatment, indicating that ferroptosis mediated the regulatory pathway of salidroside.Conclusions: Salidroside attenuates OGD-induced neuronal injury by inhibiting ferroptosis and promotes neuronal differentiation. 展开更多
关键词 SALIDROSIDE Rhodiola rosea Ferroptosis oxygen and glucose deprivation Neuronal differentiation Ischemic stroke
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Establishment of oxygen glucose deprivation reperfusion model of senescent SH-SY5Y cells
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作者 ZHANG Qiao-tian JIANG Chang-yue +3 位作者 ZHU GE Xiang-zhen LI De-li HU Wan-Xiang XIE Lu 《Journal of Hainan Medical University》 CAS 2023年第6期1-7,共7页
Obejective:To explore the establishment of an oxygen glucose deprivation/reperfusion model of senescent SH-SY5Y cells.Methods:SH-SY5Y cells were randomly divided into control(D-galactose 0 mmol/L group),D-galactose(25... Obejective:To explore the establishment of an oxygen glucose deprivation/reperfusion model of senescent SH-SY5Y cells.Methods:SH-SY5Y cells were randomly divided into control(D-galactose 0 mmol/L group),D-galactose(25 mmol/L,50 mmol/L,100 mmol/L,200 mmol/L,400 mmol/L)groups,and treated with corresponding concentrations of D-galactose for 48 h.The changes of cell morphology,β-galactosidase,the cell morphology,β-galactosidase activity by microscopic observation,cell proliferation rate by EdU kit and cell survival rate by CCK-8 assay were used to determine the decaying concentration of D-galactose and to establish the senescence model.The senescent SH-SY5Y cells were randomly divided into control group(oxygen glucose deprivation without treatment group),oxygen glucose deprivation treatment(0.5 h,1 h,1.5 h,2 h)group,followed by re-glucose reoxygenation for 24 h,and CCK-8 assay for the survival rate of senescent SH-SY5Y cells.Results:There were no significant changes in cell morphology and β-gal activity in the 25 mmol/L and 50 mmol/L groups compared with the control group(P>0.05),cytosolic hypertrophy was seen in the cells of the 100 mmol/L group,chromatin fixation in the cells of the 200 mmol/L group,and massive vacuolization in the cells of the 400 mmol/L group;the positive rate ofβ-galactosidase staining in the cells of the(100-400 mmol/L)group was significantly higher compared with the control group(P<0.05),with little difference between the 100 mmol/L and 200 mmol/L groups(P>0.05);the cell proliferation ability of the(100-400 mmol/L)group was significantly decreased in a concentration-dependent manner(P<0.05);the cell survival rate was decreased in a concentration-dependent manner(P<0.05),with IC_(50) between 100 mmol/L and 200 mmol/L.The survival of senescent SH-SY5Y cells showed a time-dependent decrease in oxygen-glucose deprivation(P<0.05),with an IC_(50) close to 1 h.Conclusion:D-gal concentration of 100 mmoL/L and 48 h of cell action could establish a survival rate of about 50%of senescent SH-SY5Y cells,and oxygen glucose deprivation of senescent SH-SY5Y cells for 1 h and reperfusion for 24 h could establish an oxygen glucose deprivation/reperfusion model of senescent SH-SY5Y cells with a survival rate close to 50%. 展开更多
关键词 Cerebral ischemia-reperfusion injury oxygen glucose deprivation reperfusion AGING D-GALACTOSE SH-SY5Y cell
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姜酮通过激活Nrf2/HO-1信号通路减轻OGD/R后氧化应激损伤对HT22细胞凋亡的抑制作用 被引量:2
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作者 侯玮琛 张桂美 张舒石 《吉林大学学报(医学版)》 CAS CSCD 北大核心 2024年第1期97-105,共9页
目的:探讨姜酮对氧糖剥夺/复糖复氧(OGD/R)后小鼠海马神经元HT22细胞的保护作用,阐明其相关作用机制。方法:培养HT22细胞,设置不同OGD/R时间梯度,建立OGD/R细胞损伤模型。HT22细胞分为对照组、OGD/R组、OGD/R+1μmol·L^(-1)姜酮组... 目的:探讨姜酮对氧糖剥夺/复糖复氧(OGD/R)后小鼠海马神经元HT22细胞的保护作用,阐明其相关作用机制。方法:培养HT22细胞,设置不同OGD/R时间梯度,建立OGD/R细胞损伤模型。HT22细胞分为对照组、OGD/R组、OGD/R+1μmol·L^(-1)姜酮组、OGD/R+10μmol·L^(-1)姜酮、OGD/R+100μmol·L^(-1)姜酮组和OGD/R+0.2%二甲亚枫(DMSO)组,CCK-8法检测各组细胞活性并计算各组细胞存活率,确定姜酮最适药物浓度。细胞分为对照组、OGD/R组、OGD/R+姜酮组和OGD/R+姜酮+核因子E2相关因子2(Nrf2)抑制剂(ML385)组,OGD/R+姜酮组细胞经姜酮给药处理4 h后予以OGD 8 h和复糖复氧8 h处理,OGD/R+姜酮+ML385组细胞在姜酮给药前予以10μmol·L^(-1)ML385预处理6 h,CCK-8法检测各组细胞活性,Western blotting法检测各组细胞中Nrf2、血红素加氧酶1(HO-1)、B细胞淋巴瘤2(Bcl-2)和Bcl-2相关X蛋白(Bax)蛋白表达水平,酶联免疫吸附试验(ELISA)法检测各组细胞培养上清中超氧化物歧化酶(SOD)活性和丙二醛(MDA)水平。结果:与对照组比较,HT22细胞经OGD 8 h和复糖复糖8 h处理后细胞存活率低于50%,以OGD 8 h和复糖复糖8 h建立HT22细胞OGD/R模型。与OGD/R组比较,OGD/R+不同剂量姜酮组细胞存活率均不同程度升高,其中OGD/R+100μmol·L^(-1)姜酮组细胞存活率升高最明显(P<0.01),故选用100μmol·L^(-1)姜酮用于后续实验。与对照组比较,OGD/R组细胞活性明显降低(P<0.01),细胞中Nrf2、HO-1和Bax蛋白表达水平明显升高(P<0.01),Bcl-2蛋白表达水平明显降低(P<0.05),细胞培养上清中SOD活性明显降低(P<0.01),MDA水平明显升高(P<0.01);与OGD/R组比较,OGD/R+姜酮组细胞活性明显升高(P<0.01),细胞中Nrf2、HO-1和Bcl-2蛋白表达水平明显升高(P<0.05或P<0.01),Bax蛋白表达水平明显降低(P<0.05),细胞培养上清中SOD活性明显升高(P<0.01),MDA水平明显降低(P<0.01);与OGD/R+姜酮组比较,OGD/R+姜酮+ML385组细胞活性明显降低(P<0.01),细胞中Nrf2、HO-1和Bcl-2蛋白表达水平明显降低(P<0.01),Bax蛋白表达水平明显升高(P<0.01),细胞培养上清中SOD活性明显降低(P<0.01),MDA水平明显升高(P<0.05)。结论:姜酮可通过激活Nrf2/HO-1信号通路减轻OGD/R后氧化应激损伤对HT22细胞凋亡的抑制作用。 展开更多
关键词 姜酮 糖氧剥夺 HT22神经元 核因子E2相关因子2 血红素加氧酶1 氧化应激 细胞凋亡
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柚皮素激活SHH-GLI1信号通路对OGD/R诱导的神经元损伤的影响
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作者 单萍 张继龙 《中国老年学杂志》 CAS 北大核心 2024年第4期861-866,共6页
目的探究柚皮素(NAR)对氧糖剥夺/复氧复糖(OGD/R)诱导神经元损伤的改善作用及机制。方法将大鼠皮层神经元分为正常组、OGD/R组、NAR组和NAR+环巴胺组,给予相应处理。CCK-8法测定神经元活性;试剂盒测定神经元活性氧(ROS)、8-羟脱氧鸟苷(O... 目的探究柚皮素(NAR)对氧糖剥夺/复氧复糖(OGD/R)诱导神经元损伤的改善作用及机制。方法将大鼠皮层神经元分为正常组、OGD/R组、NAR组和NAR+环巴胺组,给予相应处理。CCK-8法测定神经元活性;试剂盒测定神经元活性氧(ROS)、8-羟脱氧鸟苷(OHdG)、丙二醛(MDA)水平;TUNEL染色观察神经元凋亡;Western印迹检测声波刺猬(SHH)-胶质瘤相关癌基因同源物(GLI)1通路及脑源性神经营养因子(BDNF)、c-AMP反应元件结合蛋白(CREB)水平;免疫荧光染色观察GLI1的核移位。结果CCK-8法分析显示,40 mg/L NAR为最佳作用浓度。相较于正常组,OGD/R组神经元ROS相对荧光强度、8-OHdG、MDA水平、TUNEL+神经元数量、SHH、GLI1、Ptch1、BDNF、CREB蛋白及核/质GLI1水平明显增加(P<0.05);相较于OGD/R组,NAR组神经元ROS相对荧光强度、8-OHdG、MDA水平、TUNEL+神经元数量明显降低(P<0.05),SHH、GLI1、Ptch1、BDNF、CREB蛋白及核/质GLI1水平明显增加(P<0.05);相较于NAR组,NAR+环巴胺组神经元ROS相对荧光强度、8-OHdG、MDA水平、TUNEL+神经元数量明显增加(P<0.05),BDNF、CREB蛋白及核/质GLI1水平明显降低(P<0.05),SHH、GLI1、Ptch1蛋白无明显变化(P>0.05)。结论NAR可以减轻OGD/R诱导的神经元氧化损伤,其作用机制与激活SHH-GLI1通路有关。 展开更多
关键词 柚皮素 糖氧剥夺/复氧复糖 神经元 声波刺猬(SHH)-胶质瘤相关癌基因同源物(GLI)1通路 凋亡
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瑞马唑仑调节HIF-1α/BNIP3信号通路对OGD/R诱导神经细胞自噬和凋亡的影响
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作者 王效德 后晓超 +3 位作者 李青青 司玉婷 周小平 徐桂萍 《河北医药》 CAS 2024年第8期1138-1141,1146,共5页
目的探讨瑞马唑仑对OGD/R诱导的神经细胞自噬和凋亡的影响及作用机制。方法体外培养小鼠海马神经元细胞(HT22)并进行神经细胞氧糖剥夺/再复氧(OGD/R),筛选实验用瑞马唑仑浓度;将HT22细胞分为对照组、OGD/R组、瑞马唑仑组、2-ME2组、瑞... 目的探讨瑞马唑仑对OGD/R诱导的神经细胞自噬和凋亡的影响及作用机制。方法体外培养小鼠海马神经元细胞(HT22)并进行神经细胞氧糖剥夺/再复氧(OGD/R),筛选实验用瑞马唑仑浓度;将HT22细胞分为对照组、OGD/R组、瑞马唑仑组、2-ME2组、瑞马唑仑+2-ME2组;CCK8法检测5组HT22细胞活力;流式细胞术检测5组HT22细胞凋亡率;透射电子显微镜观察5组HT22细胞自噬小体的形成;Western blot检测5组HT22细胞HIF-1α、BNIP3、LC3-Ⅱ/LC3-Ⅰ的表达。结果确定实验用瑞马唑仑浓度为50μg/mL;与对照组比较,OGD/R组HT22细胞OD450值、HIF-1α、BNIP3、LC3-Ⅱ/LC3-Ⅰ蛋白水平下调,凋亡率上调(P<0.05);与OGD/R组比较,瑞马唑仑组HT22细胞自噬小体增加,OD450值、HIF-1α、BNIP3、LC3-Ⅱ/LC3-Ⅰ蛋白水平上调,凋亡率下调(P<0.05);2-ME2组HT22细胞OD450值、HIF-1α、BNIP3、LC3-Ⅱ/LC3-Ⅰ蛋白水平下调,凋亡率上调(P<0.05)。与瑞马唑仑组比较,瑞马唑仑+2-ME2组HT22细胞自噬小体数量减少,OD450值、HIF-1α、BNIP3、LC3-Ⅱ/LC3-Ⅰ蛋白水平下调,凋亡率上调(P<0.05);与2-ME2组比较,瑞马唑仑+2-ME2组HT22细胞OD450值、HIF-1α、BNIP3、LC3-Ⅱ/LC3-Ⅰ蛋白水平上调,凋亡率下调(P<0.05)。结论瑞马唑仑可通过激活HIF-1α/BNIP3信号通路促进OGD/R诱导的神经细胞自噬,抑制细胞凋亡,从而减轻OGD/R诱导的神经细胞损伤。 展开更多
关键词 瑞马唑仑 HIF-1α/BNIP3信号通路 ogd/R诱导的神经细胞 自噬 凋亡
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Hyodeoxycholic acid protects the neurovascular unit against oxygen-glucose deprivation and reoxygenation-induced injury in vitro 被引量:15
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作者 Chang-Xiang Li Xue-Qian Wang +3 位作者 Fa-Feng Cheng Xin Yan Juan Luo Qing-Guo Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第11期1941-1949,共9页
Calculus bovis is commonly used for the treatment of stroke in traditional Chinese medicine. Hyodeoxycholic acid(HDCA) is a bioactive compound extracted from calculus bovis. When combined with cholic acid, baicalin an... Calculus bovis is commonly used for the treatment of stroke in traditional Chinese medicine. Hyodeoxycholic acid(HDCA) is a bioactive compound extracted from calculus bovis. When combined with cholic acid, baicalin and jas-minoidin, HDCA prevents hypoxia-reoxygenation-induced brain injury by suppressing endoplasmic reticulum stress-mediated apoptotic signaling. However, the effects of HDCA in ischemic stroke injury have not yet been studied. Neurovascular unit(NVU) dysfunction occurs in ischemic stroke. Therefore, in this study, we investigated the effects of HDCA on the NVU under ischemic conditions in vitro. We co-cultured primary brain microvascular endothelial cells, neurons and astrocytes using a transwell chamber co-culture system. The NVU was pre-treated with 10.16 or 2.54 μg/mL HDCA for 24 hours before exposure to oxygen-glucose deprivation for 1 hour. The cell counting kit-8 assay was used to detect cell activity. Flow cytometry and terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling were used to assess apoptosis. Enzyme-linked immunosorbent assay was used to measure the expression levels of inflammatory cytokines, including interleukin-1β, interleukin-6 and tumor necrosis factor-α, and neurotrophic factors, including brain-derived neurotrophic factor and glial cell line-derived neurotrophic factor. Oxidative stress-related factors, such as superoxide dismutase, nitric oxide, malondialdehyde and γ-glutamyltransferase, were measured using kits. Pretreatment with HDCA significantly decreased blood-brain barrier permeability and neuronal apoptosis, significantly increased transendothelial electrical resistance and γ-glutamyltransferase activity, attenuated oxidative stress damage and the release of inflammatory cytokines, and increased brain-derived neurotrophic factor and glial cell line-derived neurotrophic factor expression. Our findings suggest that HDCA maintains NVU morphological integrity and function by modulating inflammation, oxidation stress, apoptosis, and the expression of neurotrophic factors. Therefore, HDCA may have therapeutic potential in the clinical management of ischemic stroke. This study was approved by the Ethics Committee of Experimental Animals of Beijing University of Chinese Medicine(approval No. BUCM-3-2016040201-2003) in April 2016. 展开更多
关键词 hyodeoxycholic acid oxygen glucose deprivation and REoxygenATION blood-brain barrier permeability anti-oxidative anti-inflammatory ANTI-APOPTOTIC BRAIN-DERIVED NEUROTROPHIC FACTOR glial cell line-derived NEUROTROPHIC FACTOR ischemic stroke in vitro NEUROVASCULAR unit
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线粒体裂变因子对OGD/R诱导的PC12细胞线粒体凋亡通路的影响
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作者 钱旭东 李国芸 +3 位作者 卜一 王红梅 张硕 窦志杰 《华中科技大学学报(医学版)》 CAS CSCD 北大核心 2024年第2期168-174,189,共8页
目的探究线粒体裂变因子(mitochondrial fission factor,MFF)在氧糖剥夺/复氧(oxygen glucose deprivation/re-oxygenation,OGD/R)处理的PC12细胞中的表达及其对线粒体凋亡通路的影响。方法选用PC12细胞系构建体外缺血性神经元损伤模型... 目的探究线粒体裂变因子(mitochondrial fission factor,MFF)在氧糖剥夺/复氧(oxygen glucose deprivation/re-oxygenation,OGD/R)处理的PC12细胞中的表达及其对线粒体凋亡通路的影响。方法选用PC12细胞系构建体外缺血性神经元损伤模型。利用实时荧光定量PCR(qRT-PCR)和蛋白质免疫印迹(Western blot)实验明确MFF mRNA和蛋白在不同处理时间点的表达情况。通过RNA干扰技术沉默MFF基因表达,利用qRT-PCR、Western blot检测MFF mRNA和蛋白的表达情况;CCK-8检测沉默MFF对OGD/R处理的PC12细胞活力的影响;JC-1和试剂盒检测线粒体膜电位、腺苷三磷酸(adenosine triphosphate,ATP)和活性氧(reactive oxygen species,ROS)水平变化;Western blot检测细胞色素C(cytochrome C,Cyt-C)、Bax和Bcl2的表达;酶联免疫吸附法(ELISA)检测Caspase-3和Caspase-9的活性变化。结果MFF在体外OGD/R诱导的PC12细胞中的mRNA和蛋白含量明显升高。MFF沉默增强了OGD/R损伤后PC12细胞的活力,降低了细胞凋亡率,并促进Bcl2和抑制Bax蛋白的表达。敲低MFF明显提高了OGD/R处理后PC12细胞的线粒体膜电位,促进ATP合成,降低ROS含量,抑制线粒体细胞色素C释放和Caspase-3和Caspase-9的活性。结论沉默MFF基因显著提高了OGD/R处理后PC12细胞的存活率,改善了线粒体功能。 展开更多
关键词 线粒体凋亡 氧糖剥夺/复氧模型 PC12细胞 线粒体裂变因子
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Selenocysteine antagonizes oxygen glucose deprivation-induced damage to hippocampal neurons 被引量:3
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作者 Xian-Jun Wang Mei-Hong Wang +5 位作者 Xiao-Ting Fu Ya-Jun Hou Wang Chen Da-Chen Tian Su-Yun Bai Xiao-Yan Fu 《Neural Regeneration Research》 SCIE CAS CSCD 2018年第8期1433-1439,共7页
Designing and/or searching for novel antioxidants against oxygen glucose effective strategy for the treatment of human isdlemic stroke. Selenium is deprivation (OGD)-induced oxidative damage represents an an essenti... Designing and/or searching for novel antioxidants against oxygen glucose effective strategy for the treatment of human isdlemic stroke. Selenium is deprivation (OGD)-induced oxidative damage represents an an essential trace dement, which is beneficial in the chemo- prevention and chemotherapy of cerebral ischemic stroke. The underlying mechanisms for its therapeutic effects, however, are not well documented. Selenocysteine (SeC) is a selenium-containing amino acid with neuroprotective potential. Studies have shown that SeC can reduce irradiation-induced DNA apoptosis by reducing DNA damage. In this study, the in vitro protective potential and mechanism of action of SeC against OGD-induced apoptosis and neurotoxicity were evaluated in HT22 mouse hippocampal neurons. We cultured HT22 cells in a glucose-free medium containing 2 mM Na2S402, which formed an OGD environment, for 90 minutes. Findings from MTT, flow cytometry and TUNEL staining showed obvious cytotoxicity and apoptosis in HT22 cells in the OGD condition. The activation of Caspa se-7 and Caspase-9 further revealed that OGD-induced apoptosis of HT22 cells was mainly achieved by triggering a mitochondrial-medi- ated pathway. Moreover, the OGD condition also induced serious DNA damage through the accumulation of reactive oxygen species and superoxide anions. However, SeC pre-treatment for 6 hours effectively inhibited OGD-induced cytotoxicity and apoptosis in HT22 cells by inhibiting reactive oxygen species-mediated oxidative damage. Our findings provide evidence that SeC has the potential to suppress OGD-induced oxidative damage and apoptosis in hippocampal neurons. 展开更多
关键词 SELENIUM SELENOCYSTEINE ischemic stroke oxygen glucose deprivation hippocampal neuron MITOCHONDRIA reaction oxygen species superoxide anion oxidative damage APOPTOSIS
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Oxygen Glucose Deprivation Post-conditioning Protects Cortical Neurons against Oxygen-glucose Deprivation Injury: Role of HSP70 and Inhibition of Apoptosis 被引量:1
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作者 赵建华 孟宪丽 +3 位作者 张健 李永丽 李月娟 樊哲铭 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2014年第1期18-22,共5页
In the present study, we examined the effect of oxygen glucose deprivation(OGD) post-conditioning(PostC) on neural cell apoptosis in OGD-PostC model and the protective effect on primary cortical neurons against OG... In the present study, we examined the effect of oxygen glucose deprivation(OGD) post-conditioning(PostC) on neural cell apoptosis in OGD-PostC model and the protective effect on primary cortical neurons against OGD injury in vitro. Four-h OGD was induced by OGD by using a specialized and humidified chamber. To initiate OGD, culture medium was replaced with de-oxygenated and glucose-free extracellular solution-Locke's medium. After OGD treatment for 4 h, cells were then allowed to recover for 6 h or 20 h. Then lactate dehydrogenase(LDH) release assay, Western blotting and flow cytometry were used to detect cell death, protein levels and apoptotic cells, respectively. For the PostC treatment, three cycles of 15-min OGD, followed by 15 min normal cultivation, were applied immediately after injurious 4-h OGD. Cells were then allowed to recover for 6 h or 20 h, and cell death was assessed by LDH release assay. Apoptotic cells were flow cytometrically evaluated after 4-h OGD, followed by re-oxygenation for 20 h(O4/R20). In addition, Western blotting was used to examine the expression of heat-shock protein 70(HSP70), Bcl-2 and Bax. The ratio of Bcl-2 expression was(0.44±0.08)% and(0.76±0.10)%, and that of Bax expression was(0.51±0.05)% and(0.39±0.04)%, and that of HSP70 was(0.42±0.031)% and(0.72±0.045)% respectively in OGD group and PostC group. After O4/R6, the rate of neuron death in PostC group and OGD groups was(28.96±3.03)% and(37.02±4.47)%, respectively. Therefore, the PostC treatment could up-regulate the expression of HSP70 and Bcl-2, but down-regulate Bax expression. As compared with OGD group, OGD-induced neuron death and apoptosis were significantly decreased in PostC group(P0.05). These findings suggest that PostC inhibited OGD-induced neuron death. This neuro-protective effect is likely achieved by anti-apoptotic mechanisms and is associated with over-expression of HSP70. 展开更多
关键词 oxygen glucose deprivation POST-CONDITIONING heat-shock protein APOPTOSIS
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Astragalus injection inhibits c-Jun N terminal kinase mRNA expression following oxygen-glucose deprivation and reintroduction in rat hippocampal neurons 被引量:6
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作者 Dongqing Ye Weijuan Gao +2 位作者 Fengxia Yan Tao Qian Yali Zhang 《Neural Regeneration Research》 SCIE CAS CSCD 2009年第11期879-884,共6页
BACKGROUND: In studies concerning cell injury induced by cerebral ischemia-reperfusion, current experiments have primarily focused on altered protein levels. In addition, the apoptotic proteins Bax and Bcl-2 have bee... BACKGROUND: In studies concerning cell injury induced by cerebral ischemia-reperfusion, current experiments have primarily focused on altered protein levels. In addition, the apoptotic proteins Bax and Bcl-2 have been thoroughly studied with regard to initiating neuronal apoptosis. OBJECTIVE: To establish an in vitro model of oxygen-glucose deprivation and reintroduction in the rat hippocampus to simulate cerebral ischemia-reperfusion injury; to observe c-Jun N-terminal kinase 3 (JNK3) mRNA expression in hippocampal neurons following Astragalus injection; and thus to determine changes in the signaling and downstream pathways of neuronal apoptosis at the cellular and molecular level. DESIGN, TIME AND SETTING: A randomized, controlled, cellular and molecular experiment was performed at the Department of Central Laboratory, Chengde Medical College from February to June 2008. MATERIALS: Astragalus injection, the main ingredient of astragaloside, was purchased from Chengdu Di'ao Jiuhong Pharmaceutical Manufactory, China. JNK3 mRNA probe and in situ hybridization kit were purchased from Tianjin Haoyang Biological Technology, China, and JNK3 RT-PCR primers were designed by Shanghai Bio-engineering, China. METHODS: Primary cultures of hippocampal neurons derived from Sprague Dawley rats, aged 1 2 days, were established. After 8 days, the hippocampal neurons were assigned to the following interventions: model group, Astragalus group, and vehicle control group, cells were subjected to oxygen-glucose reintroduction after oxygen-glucose deprivation for 30 minutes in sugar-free Earle's solution and a hypoxia device, which contained high-purity nitrogen. The normal control group was subjected to primary culture techniques and was not treated using above-mentioned interventions. In addition, the Astragalus and vehicle control groups were treated with Astragalus injection (0.5 g/L raw drug) or sterile, deionized water at 2 hours prior to oxygen-glucose deprivation, respectively. MAIN OUTCOME MEASURES: JNK3 mRNA expression was measured by in situ hybridization and RT-PCR at 0, 0.5, 2, 6, 24, 72, and 120 hours after oxygen-glucose reintroduction. RESULTS: Hippocampal neuronal morphology was normal in the normal control group. Hippocampal neurons exhibited apparent apoptosis-like pathological changes in the model, as well as the vehicle control, groups. The apoptosis-like pathological changes in the hippocampal neurons were less in the Astragalus group. Results from in situ hybridization and RT-PCR showed that JNK3 mRNA expression significantly increased in hippocampal neurons from model group, as well as the vehicle control group, compared with the normal control group (P 〈 0.05). In addition, JNK3 mRNA expression significantly decreased in hippocampal neurons of the Astragalus group, compared with the model group and vehicle control group (P 〈 0.05). CONCLUSION: Astragalus injection inhibited apoptosis-related JNK3 mRNA expression following oxygen-glucose deprivation and reintroduction, and accordingly played a role in inhibiting hippocampal neuronal apoptosis. 展开更多
关键词 oxygen-glucose deprivation and reintroduction Astragalus injection c-jun N-terminalkinase 3 mRNA hippocampal neuron
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Shuxuetong injection protects cerebral microvascular endothelial cells against oxygen-glucose deprivation reperfusion 被引量:14
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作者 Zuo-Yan Sun Fu-Jiang Wang +6 位作者 Hong Guo Lu Chen Li-Juan Chai Rui-Lin Li Li-Min Hu Hong Wang Shao-Xia Wang 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第5期783-793,共11页
Shuxuetong injection composed of leech(Hirudo nipponica Whitman) and earthworm(Pheretima aspergillum) has been used for the clinical treatment of acute stroke for many years in China. However, the precise neuroprotect... Shuxuetong injection composed of leech(Hirudo nipponica Whitman) and earthworm(Pheretima aspergillum) has been used for the clinical treatment of acute stroke for many years in China. However, the precise neuroprotective mechanism of Shuxuetong injection remains poorly understood. Here, cerebral microvascular endothelial cells(bEnd.3) were incubated in glucose-free Dulbecco's modified Eagle's medium containing 95% N_2/5% CO_2 for 6 hours, followed by high-glucose medium containing 95% O_2 and 5% CO_2 for 18 hours to establish an oxygen-glucose deprivation/reperfusion model. This in vitro cell model was administered Shuxuetong injection at 1/32, 1/64, and 1/128 concentrations(diluted 32-, 64-, and 128-times). Cell Counting Kit-8 assay was used to evaluate cell viability. A fluorescence method was used to measure lactate dehydrogenase, and a fluorescence microplate reader used to detect intracellular reactive oxygen species. A fluorescent probe was also used to measure mitochondrial superoxide production. A cell resistance meter was used to measure transepithelial resistance and examine integrity of monolayer cells. The fluorescein isothiocyanate-dextran test was performed to examine blood-brain barrier permeability. Real-time reverse transcription polymerase chain reaction was performed to analyze mRNA expression levels of tumor necrosis factor alpha, interleukin-1β, interleukin-6, and inducible nitric oxide synthase. Western blot assay was performed to analyze expression of caspase-3, intercellular adhesion molecule 1, vascular cell adhesion molecule 1, occludin, vascular endothelial growth factor, cleaved caspase-3, B-cell lymphoma 2, phosphorylated extracellular signal-regulated protein kinase, extracellular signal-regulated protein kinase, nuclear factor-κB p65, I kappa B alpha, phosphorylated I kappa B alpha, I kappa B kinase, phosphorylated I kappa B kinase, claudin-5, and zonula occludens-1. Our results show that Shuxuetong injection increases bEnd.3 cell viability and B-cell lymphoma 2 expression, reduces cleaved caspase-3 expression, inhibits production of reactive oxygen species and mitochondrial superoxide, suppresses expression of tumor necrosis factor alpha, interleukin-1β, interleukin-6, inducible nitric oxide synthase mRNA, intercellular adhesion molecule-1, and vascular cell adhesion molecule-1, markedly increases transepithelial resistance, decreases blood-brain barrier permeability, upregulates claudin-5, occludin, and zonula occludens-1 expression, reduces nuclear factor-κB p65 and vascular endothelial growth factor expression, and reduces I kappa B alpha, extracellular signal-regulated protein kinase 1/2, and I kappa B kinase phosphorylation levels. Overall, these findings suggest that Shuxuetong injection has protective effects on brain microvascular endothelial cells after oxygen-glucose deprivation/reperfusion. Moreover, its protective effect is associated with reduction of mitochondrial superoxide production, inhibition of the inflammatory response, and inhibition of vascular endothelial growth factor, extracellular signal-regulated protein kinase 1/2, and the nuclear factor-κB p65 signaling pathway. 展开更多
关键词 nerve REGENERATION SHUXUETONG injection brain MICROVASCULAR endothelial cells oxygen-glucose deprivation/reperfusion tight junction proteins mitochondrial function inflammatory factors blood-brain barrier neuroprotection neural REGENERATION
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Curcumin pretreatment and post-treatment both improve the antioxidative ability of neurons with oxygen-glucose deprivation 被引量:8
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作者 Jing-xian Wu Lu-yu Zhang +3 位作者 Yan-lin Chen Shan-shan Yu Yong Zhao Jing Zhao 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第3期481-489,共9页
Recent studies have shown that induced expression of endogenous antioxidative enzymes thr- ough activation of the antioxidant response element/nuclear factor erythroid 2-related factor 2 (Nrf2) pathway may be a neur... Recent studies have shown that induced expression of endogenous antioxidative enzymes thr- ough activation of the antioxidant response element/nuclear factor erythroid 2-related factor 2 (Nrf2) pathway may be a neuroprotective strategy. In this study, rat cerebral cortical neurons cultured in vitro were pretreated with 10 ktM curcumin or post-treated with 5 pM curcumin, respectively before or after being subjected to oxygen-glucose deprivation and reoxygenation for 24 hours. Both pretreatment and post-treatment resulted in a significant decrease of cell injury as indicated by propidium iodide/Hoechst 33258 staining, a prominent increase of Nrf2 protein expression as indicated by western blot analysis, and a remarkable increase of protein expression and enzyme activity in whole cell lysates of thioredoxin before ischemia, after ischemia, and after reoxygenation. In addition, post-treatment with curcumin inhibited early DNA/RNA oxidation as indicated by immunocytochemistry and increased nuclear Nrf2 protein by inducing nuclear accumulation of Nrf2. These findings suggest that curcumin activates the expression of thi- oredoxin, an antioxidant protein in the Nrf2 pathway, and protects neurons from death caused by oxygen-glucose deprivation in an in vitro model of ischemia/reperfusion. We speculate that pharmacologic stimulation of antioxidant gene expression may be a promising approach to neu- roprotection after cerebral ischemia. 展开更多
关键词 nerve regeneration brain injury CURCUMIN ischemia/reperfusion injury OXIDATIVESTRESS primary cell culture cortical neurons oxygen-glucose deprivation PRETREATMENT POST-TREATMENT NSFC grant neural regeneration
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Proliferation and Differentiation of Neural Stem Cells Co-Cultured with Cerebral Microvascular Endothelial Cells after Oxygen-glucose Deprivation 被引量:3
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作者 熊永洁 尹波 +4 位作者 肖连臣 王倩 甘莉 张逸驰 张苏明 《Journal of Huazhong University of Science and Technology(Medical Sciences)》 SCIE CAS 2013年第1期63-68,共6页
Various stem cells, including neural stem cells (NSCs), have been extensively studied in stroke models, but how to increase neuronal differentiation rate of NSCs remains unresolved, particu- larly in a damaged envir... Various stem cells, including neural stem cells (NSCs), have been extensively studied in stroke models, but how to increase neuronal differentiation rate of NSCs remains unresolved, particu- larly in a damaged environment. The purpose of this study was to investigate the effects of cerebral mi- crovascular endothelial cells (CMECs) on the neurogenesis of NSCs with or without oxygen-glucose deprivation (OGD). The NSCs acquired from primary culture were immunostained to prove cell purity. Survival and proliferation of NSCs were determined after the co-culture with CMECs for 7 days. After removing the CMECs, NSCs were randomly divided into two groups as follows: OGD and non-OGD groups. Both groups were maintained in differentiation culture for 4 days to evaluate the differentiation rate. Mouse embryo fibroblast (MEF) cells co-cultured with NSCs served as control group. NSCs co-cultured with CMECs had an increase in size (on the 7th day: 89.80±26.12 μm vs. 73.08±15.01μm, P〈0.001) (n=12) and number [on the 7th day: 6.33±5.61/high power objective (HP) vs. 2.23±1.61/HP, P〈0.001] (n=12) as compared with those co-cultured with MEF cells. After further differentiation cul- ture for 4 days, NSCs co-cultured with CMECs had an increase in neuronal differentiation rate in OGD and non-OGD groups, but not in the control group (15.16% and 16.07% vs. 8.81%; both P〈0.001) (n=6) This study provided evidence that OGD could not alter the effects of CMECs in promoting the neuronal differentiation potential of NSCs. These findings may have important implications for the development of new cell therapies for cerebral vascular diseases. 展开更多
关键词 cerebral microvascular endothelial cells cell therapy neural stem cells oxygen-glucose deprivation TRANSPLANTATION
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Activin A prevents neuron-like PC12 cell apoptosis after oxygen-glucose deprivation 被引量:5
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作者 Guihua Xu Jinting He +7 位作者 Hongliang Guo Chunli Mei Jiaoqi Wang Zhongshu Li Han Chen Jing Mang Hong Yang Zhongxin Xu 《Neural Regeneration Research》 SCIE CAS CSCD 2013年第11期1016-1024,共9页
In this study, PC12 cells were induced to differentiate into neuron-like cells using nerve growth factor, and were subjected to oxygen-glucose deprivation. Cells were treated with 0, 10, 20, 30, 50, 100 ng/mL exogenou... In this study, PC12 cells were induced to differentiate into neuron-like cells using nerve growth factor, and were subjected to oxygen-glucose deprivation. Cells were treated with 0, 10, 20, 30, 50, 100 ng/mL exogenous Activin A. The 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl tetrazolium bromide assay and Hoechst 33324 staining showed that the survival percentage of PC12 cells significantly decreased and the rate of apoptosis significantly increased after oxygen-glucose deprivation. Exogenous Activin A significantly increased the survival percentage of PC12 cells in a dose-dependent manner. Reverse transcription-PCR results revealed a significant increase in Activin receptor IIA, Smad3 and Smad4 mRNA levels, which are key sites in the Activin A/Smads signaling pathway, in neuron-like cells subjected to oxygen-glucose deprivation, while mRNA expression of the apoptosis-regulation gene caspase-3 decreased. Our experimental findings indicate that exogenous Activin A plays an anti-apoptotic role and protects neurons by means of activating the Activin A/Smads signaling pathway. 展开更多
关键词 neural regeneration brain injury biological factor oxygen-glucose deprivation Activin A ActivinA/Smads signaling pathway caspase-3 apoptosis grants-supported paper NEUROREGENERATION
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Proprotein convertase 1/3-mediated down-regulation of brain-derived neurotrophic factor in cortical neurons induced by oxygen-glucose deprivation 被引量:3
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作者 Xiang-Yang Zhang Feng Liu +2 位作者 Yan Chen Wei-Chun Guo Zhao-Hui Zhang 《Neural Regeneration Research》 SCIE CAS CSCD 2020年第6期1066-1070,共5页
Brain-derived neurotrophic factor(BDNF)has robust effects on synaptogenesis,neuronal differentiation and synaptic transmission and plasticity.The maturation of BDNF is a complex process.Proprotein convertase 1/3(PC1/3... Brain-derived neurotrophic factor(BDNF)has robust effects on synaptogenesis,neuronal differentiation and synaptic transmission and plasticity.The maturation of BDNF is a complex process.Proprotein convertase 1/3(PC1/3)has a key role in the cleavage of protein precursors that are directed to regulated secretory pathways;however,it is not clear whether PC1/3 mediates the change in BDNF levels caused by ischemia.To clarify the role of PC1/3 in BDNF maturation in ischemic cortical neurons,primary cortical neurons from fetal rats were cultured in a humidified environment of 95%N_2 and 5%CO_2 in a glucose-free Dulbecco's modified Eagle's medium at 37℃for3 hours.Enzyme-linked immunosorbent assays and western blotting showed that after oxygen-glucose deprivation,the secreted and intracellular levels of BDNF were significantly reduced and the intracellular level of PC1/3 was decreased.Transient transfection of cortical neurons with a PC1/3 overexpression plasmid followed by oxygen-glucose deprivation resulted in increased PC1/3 levels and increased BDNF levels.When levels of the BDNF precursor protein were reduced,the concentration of BDNF in the culture medium was increased.These results indicate that PC 1/3 cleavage of BDNF is critical for the conversion of pro-BDNF in rat cortical neurons during ischemia.The study was approved by the Animal Ethics Committee of Wuhan University School of Basic Medical Sciences. 展开更多
关键词 cortical neuron ischemia NEUROTROPHIN oxygen-glucose deprivation precursor protein of BRAIN-DERIVED NEUROTROPHIC factor PROPROTEIN CONVERTASE PROPROTEIN CONVERTASE 1/3
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Silencing Huwe1 reduces apoptosis of cortical neurons exposed to oxygen-glucose deprivation and reperfusion 被引量:6
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作者 Guo-Qian He Wen-Ming Xu +3 位作者 Hui-Juan Liao Chuan Jiang Chang-Qing Li Wei Zhang 《Neural Regeneration Research》 SCIE CAS CSCD 2019年第11期1977-1985,共9页
HECT, UBA and WWE domain-containing 1(Huwe1), an E3 ubiquitin ligase involved in the ubiquitin-proteasome system, is widely expressed in brain tissue. Huwe1 is involved in the turnover of numerous substrates, includin... HECT, UBA and WWE domain-containing 1(Huwe1), an E3 ubiquitin ligase involved in the ubiquitin-proteasome system, is widely expressed in brain tissue. Huwe1 is involved in the turnover of numerous substrates, including p53, Mcl-1, Cdc6 and N-myc, thereby playing a critical role in apoptosis and neurogenesis. However, the role of Huwe1 in brain ischemia and reperfusion injury remains unclear. Therefore, in this study, we investigated the role of Huwe1 in an in vitro model of ischemia and reperfusion injury. At 3 days in vitro, primary cortical neurons were transduced with a control or shRNA-Huwe1 lentiviral vector to silence expression of Huwe1. At 7 days in vitro, the cells were exposed to oxygen-glucose deprivation for 3 hours and reperfusion for 24 hours. To examine the role of the c-Jun N-terminal kinase(JNK)/p38 pathway, cortical neurons were pretreated with a JNK inhibitor(SP600125) or a p38 MAPK inhibitor(SB203508) for 30 minutes at 7 days in vitro, followed by ischemia and reperfusion. Neuronal apoptosis was assessed by TUNEL assay. Protein expression levels of JNK and p38 MAPK and of apoptosis-related proteins(p53, Gadd45 a, cleaved caspase-3, Bax and Bcl-2) were measured by western blot assay. Immunofluorescence labeling for cleaved caspase-3 was performed. We observed a significant increase in neuronal apoptosis and Huwe1 expression after ischemia and reperfusion. Treatment with the shRNA-Huwe1 lentiviral vector markedly decreased Huwe1 levels, and significantly decreased the number of TUNEL-positive cells after ischemia and reperfusion. The silencing vector also downregulated the pro-apoptotic proteins Bax and cleaved caspase-3, and upregulated the anti-apoptotic proteins Gadd45 a and Bcl-2. Silencing Huwe1 also significantly reduced p-JNK levels and increased p-p38 levels. Our findings show that downregulating Huwe1 affects the JNK and p38 MAPK signaling pathways as well as the expression of apoptosis-related genes to provide neuroprotection during ischemia and reperfusion. All animal experiments and procedures were approved by the Animal Ethics Committee of Sichuan University, China in January 2018(approval No. 2018013). 展开更多
关键词 nerve REGENERATION ischemic stroke oxygen-glucose deprivation and REPERFUSION ischemia/reperfusion cortical neuron ubiquitin proteasome system Huwe1 APOPTOSIS therapeutic targets CELL culture CELL death neural REGENERATION
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Protective mechanisms of micro RNA-27a against oxygen-glucose deprivation-induced injuries in hippocampal neurons 被引量:7
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作者 Qun Cai Ting Wang +1 位作者 Wen-jie Yang Xing Fen 《Neural Regeneration Research》 SCIE CAS CSCD 2016年第8期1285-1292,共8页
Hypoxic injuries during fetal distress have been shown to cause reduced expression of micro RNA-27a(mi R-27a),which regulates sensitivity of cortical neurons to apoptosis.We hypothesized that miR-27 a overexpression... Hypoxic injuries during fetal distress have been shown to cause reduced expression of micro RNA-27a(mi R-27a),which regulates sensitivity of cortical neurons to apoptosis.We hypothesized that miR-27 a overexpression attenuates hypoxia- and ischemia-induced neuronal apoptosis by regulating FOXO1,an important transcription factor for regulating the oxidative stress response.miR-27 a mimic was transfected into hippocampal neurons to overexpress miR-27 a.Results showed increased hippocampal neuronal viability and decreased caspase-3 expression.The luciferase reporter gene system demonstrated that mi R-27 a directly binded to FOXO1 3′UTR in hippocampal neurons and inhibited FOXO1 expression,suggesting that FOXO1 was the target gene for mi R-27 a.These findings confirm that mi R-27 a protects hippocampal neurons against oxygen-glucose deprivation-induced injuries.The mechanism might be mediated by modulation of FOXO1 and apoptosis-related gene caspase-3 expression. 展开更多
关键词 nerve regeneration brain injury miR-27a hypoxic-ischemic hippocampal neurons oxygen-glucose deprivation cell survival apoptosis caspase 3 FOX01 luciferase reporter gene system NEUROPROTECTION neural regeneration
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Protective effect of luteolin-7-O-β-D-glucuronide against oxygenglucose deprivation-induced H9C2 cardiomyocytes injury 被引量:1
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作者 Hai-feng ZHANG Lu LI +5 位作者 Sheng-qun HOU Li-hui LU Xian-chu HAN Zhen-zhen SONG Ying SUN Fang WANG 《中国药理学与毒理学杂志》 CAS CSCD 北大核心 2018年第4期332-333,共2页
OBJECTIVE To investigate the protective effect and mechanisms of luteolin-7-O-β-dglucuronide(LGU) on oxygen glucose deprivation(OGD)-induced H9C2 cardiomyocytes injury.METH.ODS The protective effect of LGU on OGD-ind... OBJECTIVE To investigate the protective effect and mechanisms of luteolin-7-O-β-dglucuronide(LGU) on oxygen glucose deprivation(OGD)-induced H9C2 cardiomyocytes injury.METH.ODS The protective effect of LGU on OGD-induced H9C2 cardiomyocytes death were investigated by MTT assay.The microfilament change of H9C2 cardiomyocytes was detected by phalloidin staining and the lactate dehydrogenase(LDH) leakage rate was also detected by LDH kit.In order to explore the possible mechanisms of LGU,ATP content,intracellular Ca^(2+) fluorescent intensity and concentra.tion,mitochondrial membrane potential(MMP)and the expressions of apoptosis-related proteins were detected by ATP kit,CLSM(Fluo-3/AM probe),Ca^(2+) kit,CLSM(JC-1 probe) and western blotting meth.od,respectively.RESULTS The inhibition of H9C2 cardiomyocyte survival rate inducedby OGD was improvedby pretreated with LGU in a concentrationdependent manner.The microfilaments injury as well as the increase of LDH leakage rate were also improvedby pretreated with LGU.The ATP content was significantly decreased,intracellular Ca^(2+) fluorescent intensity and concentration were significantly increased and the MMP was significantly decreased 4 hafter OGD.LGU significantly reversed the de.crease of intracellular ATP content,the increase of Ca^(2+) fluorescent intensity and concentration and the decrease of MMP.The release of cytochrome C,the expressionsof caspase-9 and caspase-3 in H9C2 cardiomyocytes were increased 16 h after OGD.LGUsignificantly inhibited the changes of these apop.tosis-related proteins.CONCLUSION LGU has a significant protective effect against OGD-induced H9C2 cardiomyocytes injury through inhibiting calcium overload,increasing ATP content,improving mi.tochondrial function and inhibiting apoptosis. 展开更多
关键词 心肌细胞 保护作用 治疗方法 肿瘤
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基于JAK2/STAT3通路探讨活血荣络方对OGD/R后BMEC的干预作用及机制
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作者 龚翠兰 马强 +2 位作者 杨仁义 王智槟 周德生 《湖南中医药大学学报》 CAS 2024年第3期350-356,共7页
目的探讨活血荣络方激活Janus酪氨酸激酶2/信号转导和转录激活剂3(Janus kinase 2/signal transducer and activator of transcription 3,JAK2/STAT3)通路对氧糖剥夺/复氧(oxygen-glucose deprivation/reperfusion,OGD/R)后脑微血管内... 目的探讨活血荣络方激活Janus酪氨酸激酶2/信号转导和转录激活剂3(Janus kinase 2/signal transducer and activator of transcription 3,JAK2/STAT3)通路对氧糖剥夺/复氧(oxygen-glucose deprivation/reperfusion,OGD/R)后脑微血管内皮细胞(brain microvascular endothelial cell,BMEC)的干预作用和机制。方法培养大鼠BMEC(bEnd.3细胞),建立OGD/R模型;将细胞随机分为正常组(10%空白血清)、模型组(10%空白血清)、活血荣络方组(10%活血荣络方含药血清)、丁苯酞组(10%丁苯酞含药血清)、Stattic组(10%空白血清+10μmol/mL Stattic)、联用组(10%活血荣络方含药血清+10μmol/mL Stattic),并分别给予相应的药物干预24 h。采用CCK-8法检测活血荣络方对OGD/R后bEnd.3细胞活性的影响;采用划痕实验和Transwell迁移实验分别检测活血荣络方对OGD/R后bEnd.3细胞划痕愈合和细胞迁移的影响;采用Western blot法检测bEnd.3细胞中JAK2、p-JAK2、STAT3、p-STAT3、血管内皮细胞生长因子A(vascular endothelial growth factor A,VEGFA)蛋白表达水平。结果与正常组比较,模型组bEnd.3细胞存活率、细胞划痕愈合率、细胞迁移数显著降低(P<0.01),JAK2、p-JAK2、STAT3、p-STAT3、VEGFA的表达量升高(P<0.05或P<0.01);与模型组比较,活血荣络方组bEnd.3细胞的存活率、细胞划痕愈合率、细胞迁移数显著升高(P<0.01),JAK2、p-JAK2、p-STAT3、STAT3、VEGFA的表达量升高(P<0.05或P<0.01);与Stattic组比较,联用组bEnd.3细胞的存活率、细胞划痕愈合率、细胞迁移数显著升高(P<0.05或P<0.01),STAT3、VEGFA的表达量升高(P<0.05)。结论活血荣络方可能激活JAK2/STAT3信号通路并诱导内皮细胞的增殖、迁移和存活,激活VEGFA表达并减轻脑缺血再灌注损伤,具有神经保护作用。 展开更多
关键词 缺血性脑卒中 活血荣络方 JAK2/STAT3通路 氧糖剥夺/复氧 脑微血管内皮细胞
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Oxygen-glucose deprivation regulates BACE1 expression through induction of autophagy in Neuro-2a/APP695 cells 被引量:3
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作者 Rong-fu Chen Ting Zhang +7 位作者 Yin-yi Sun Ya-meng Sun Wen-qi Chen Nan Shi Fang Shen Yan Zhang Kang-yong Liu Xiao-jiang Sun 《Neural Regeneration Research》 SCIE CAS CSCD 2015年第9期1433-1440,共8页
Our previous findings have demonstrated that autophagy regulation can alleviate the decline of learning and memory by eliminating deposition of extracellular beta-amyloid peptide (Aβ) in the brain after stroke, but... Our previous findings have demonstrated that autophagy regulation can alleviate the decline of learning and memory by eliminating deposition of extracellular beta-amyloid peptide (Aβ) in the brain after stroke, but the exact mechanism is unclear. It is presumed that the regulation of beta-site APP-deaving enzyme 1 (BACE1), the rate-limiting enzyme in metabolism of Aβ, would be a key site. Neuro-2a/amyloid precursor protein 695 (APP695) cell models of cerebral isch- emia were established by oxygen-glucose deprivation to investigate the effects of Rapamycin (an autophagy inducer) or 3-methyladenine (an autophagy inhibitor) on the expression of BACE1. Either oxygen-glucose deprivation or Rapamycin down-regulated the expression of BACE1 while 3-methyladenine up-regulated BACE1 expression. These results confirm that oxygen-glucose deprivation down-regulates BACE1 expression in Neuro-2a/APP695 cells through the introduction of autophagy. 展开更多
关键词 nerve regeneration brain lnjury oxygen-glucose deprivation cerebral ischemia stroke AUTOPHAGY beta-site APP-cleaving enzyme 1 (BACE1) beta-amyloid peptide 3-methyladenine (3-MA) RAPAMYCIN neural regeneration
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