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Effects of transfected adenovirus-mediated transcription factor X-box binding protein 1 on hippocampal-derived neural stem cell proliferation and apoptosis under hypoxia

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Neural Regeneration Research 2010年第13期5卷 981-986页

作者： Ying Sha Baohua Liu Qun Liu Lei Song jia fan Yong Liu Department of Neurology First Hospital Jilin University Changchun 130021 Jilin Province China Department of Neurology Second Hospital Jilin University Changchun 130021 Jilin Province China National Institute of Neurological Disorders and Stroke P.O. Box 5801 Bethesda MD 20824 USA

BACKGROUND： Neural stem cell （NSC） survival is closely associated with cell apoptosis in ischemic-hypoxic regions following transplantation. Numerous studies have revealed that X-box binding protein 1 （XBP1） is a transcription factor during endoplasmic reticulum unfolded protein response and is essential for cell survival, differentiation, and anti-apoptotic effects. OBJECTIVE： To determine the effects of the XBP1 gene on NSC proliferation and apoptosis under hypoxic conditions following XBP1 gene transfection into rat embryonic hippocampal NSCs using recombinant adenovirus vector. DESIGN, TIME AND SETTING： In vitro experiments were performed at the Laboratory of Cell Biology of Jilin University and Laboratory of Proteomics, Department of Neurology, Jilin University China from September 2008 to November 2009. MATERIALS： Recombinant adenovirus package XBP1 gene and Ad-XBPl-enhanced green fluorescent protein plasmid （Guangzhou Easywin BioMed Technology, China）, rabbit anti-XBP1 and its target gene estrogen receptor degradation-enhancing a-mannosidase-like protein （EDEM） glucose-regulated protein 78 （GRP78）, anti-apoptotic molecule Bcl-2 and proapoptotic molecule Bax polyclonal antibody （Santa Cruz Biotechnology, Inc., Santa Cruz, CA, USA）, and COCI2 （Sigma, St. Louis, MO, USA） were used in the present study. METHODS： Hippocampi from embryonic, Sprague Dawley rats on gestational day 16 were harvested for NSC isolation and cloning, followed by immunofluorescence for Nestin and sub-culturing. The recombinant adenovirus Ad-XBPl-enhanced green fluorescent protein plasmid was transfected into rat embryonic hippocampal NSCs, and then CoCl2 was applied to induce hypoxia. MAIN OUTCOME MEASURES： Cell quantification and 3-（4, 5-dimethylthiazol-2-yl）-2, 5-diphenyltetrazolium bromide colorimetric assay were utilized to detect proliferation in XBPl-transfected NSCs for 7 consecutive days. Western blot assay was utilized to quantify XBP1 GRP78, EDEM, Bcl-2, and Bax expression. Flow

关键词： X-box binding protein 1 hypoxia apoptosis endoplasmic reticulum stress neural stem cells transplantation nerve growth factor neural regeneration

Preparation of mesoporous MgO-templated carbons from phenolic resin and their applications for electric double-layer capacitors

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Chinese Science Bulletin 2013年第9期58卷 992-997页

作者： LIU WenJie WANG ChengYang WANG JiuZhou jia fan ZHENG jiaMing CHEN MingMing Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin University

Mesoporous carbons were synthesized using thermoplastic phenolic resin(PF) as carbonaceous precursor and magnesium citrate as template *** structure was determined as ink-bottle-like geometry through TEM,N2 adsorption analysis combined with TG *** porous carbons prepared were then applied as electrode material for electric double-layer *** capacitor performance was examined in 30 wt% KOH aqueous solution by cyclic voltammetry and galvanostatic charge/discharge *** carbon prepared with MgO/PF mass ratio of 8/2 had a BET surface area of 1920 m2 g-1 and exhibited a capacitance of 220 F g-1 at a current density of 50 mA ***,the carbon with the ratio of 4/6 had the optimize proportion of mesopores,which ensures its good rate performance that up to 98.3%,expressed as the ratio of the capacitance measured at 1000 mA g-1 against that at 50 mA g-1.

关键词：双电层电容器热塑性酚醛树脂碳原子 MgO 介孔模板透射电子显微镜应用

术前静脉期CT影像组学列线图预测喉鳞癌患者预后

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中国临床医学影像杂志 2024年第1期35卷 26-30,45页

作者：范嘉玮程梦雨杨哲李文菲赵月梅王占秋秦皇岛市第一医院影像科河北秦皇岛066000

目的:研究增强CT影像组学术前预测喉鳞癌术后复发的价值。方法:收集本院64例经术后病理证实为喉鳞癌的患者作为训练组;将TCGA数据库中下载的39例患者作为验证组,基于患者术前CT增强静脉期图像,利用3D-slicer软件提取喉鳞癌全域影像组学... 详细信息

目的:研究增强CT影像组学术前预测喉鳞癌术后复发的价值。方法:收集本院64例经术后病理证实为喉鳞癌的患者作为训练组;将TCGA数据库中下载的39例患者作为验证组,基于患者术前CT增强静脉期图像,利用3D-slicer软件提取喉鳞癌全域影像组学特征。在训练组中,应用单因素COX及LASSO回归确定复发相关的最佳组学特征,构建影像组学风险评分对喉鳞癌患者预后分层;基于多因素COX回归构建预测1年、3年无进展生存的列线图。采用受试者工作特征曲线(ROC)评估影像组学风险评分的诊断效能。最后采用相同阈值对验证组患者进行模型验证。结果:训练组确定4个影像组学特征与复发显著相关,构建影像组学评分模型,Kaplan-Meier曲线显示训练组和验证组低风险组(组学评分<0.7)无进展生存时间均显著长于高风险组(P<0.001,P=0.025)。多因素COX回归研究表明影像组学评分是喉鳞癌术后复发的独立危险因素。在训练组中列线图预测喉鳞癌患者三年术后无进展生存C指数为0.816,影像组学模型C指数为0.795。在验证组中列线图C指数为0.858,影像组学模型C指数为0.795。结论:基于术前CT增强图像提取的喉鳞癌组学特征并建立列线图模型,可用于术前预测患者术后复发,且诊断效能高于临床常用TNM分期,可作为临床诊疗决策依据。

关键词：喉肿瘤体层摄影术,螺旋计算机

眠得乐方调控神经递质改善失眠大鼠睡眠行为的研究

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世界科学技术-中医药现代化 2024年第6期26卷 1574-1582页

作者：赵智茹祁建军吴汉涛付长庚曲华谭令贾凡龙霖梓中国中医科学院西苑医院老年病研究所北京100091 中国医学科学院中国协和医科大学药用植物研究所北京1100193 北京了未元中医药研究有限公司北京102600 国家中医心血管病临床医学研究中心北京100091 中山大学附属第八医院深圳518033

目的观察“眠得乐方”对失眠大鼠的行为学、脑组织及中枢神经递质的影响。方法将SD雄性大鼠随机分为对照组、模型组、眠得乐方组、艾司唑仑组,每组10只,采用腹腔注射氯苯丙氨酸(Pchlorophenylalanine,PCPA)的方法构建失眠模型。造模成功... 详细信息

目的观察“眠得乐方”对失眠大鼠的行为学、脑组织及中枢神经递质的影响。方法将SD雄性大鼠随机分为对照组、模型组、眠得乐方组、艾司唑仑组,每组10只,采用腹腔注射氯苯丙氨酸(Pchlorophenylalanine,PCPA)的方法构建失眠模型。造模成功后,对照组与模型组生理盐水灌胃,眠得乐方组与艾司唑仑组分别给予药物灌胃。通过戊巴比妥钠翻正实验和旷场实验评价各组大鼠失眠样行为,苏木精-伊红(Hematoxylin and eosin,HE)染色观察大鼠大脑皮质、海马、下丘脑组织的病理改变,酶联免疫吸附测定法(Enzyme-linked mmunosorbent assay,ELISA)测定大鼠大脑皮质、下丘脑、海马区的γ-氨基丁酸(Gamma-aminobutyric acid,GABA)、5-羟色胺(5-hydroxytryptamine,5-HT)的表达水平。结果模型组大鼠的睡眠潜伏期显著拉长(P<0.01),而睡眠时间较少(P<0.01),精神状态、皮毛色泽等较差,体质量明显减轻(P<0.01),与模型组比较,眠得乐方组和艾司唑仑组大鼠的睡眠潜伏期显著缩短(P<0.01),睡眠持续时间显著拉长(P<0.01),体质量显著升高(P<0.05,P<0.01);旷场实验中模型组大鼠总活动距离增加,平均速度和中心区域停留时间减少(P<0.05),眠得乐方组和艾司唑仑组大鼠总活动距离显著减少(P<0.05),平均速度增加和中心区域停留时间延长(P<0.05)。HE结果显示模型组大鼠大脑皮质、海马、下丘脑神经元数量、形态结构、排列等均有不同程度受损,眠得乐方组及艾司唑仑组显著改善。ELISA结果显示模型组大鼠大脑皮质和下丘脑的5-HT和GABA表达量显著降低(P<0.01,P<0.05),海马组织的GABA表达量亦显著降低(P<0.01)。眠得乐方组大脑皮质GABA和下丘脑GABA、5-HT的蛋白表达量均显著升高(P<0.01)。结论眠得乐方能够改善失眠大鼠的精神状态、恢复正常体质量、提高睡眠效率、减轻焦虑和紧张度。其机制可能与升高5-HT和GABA的含量,抑制下丘脑和脑干促觉醒核团的扩散及传导有关。

关键词：眠得乐方失眠旷场实验神经递质

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单纯肥胖患儿血清25-(OH)-D水平与营养代谢指标的相关性

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川北医学院学报 2024年第6期39卷 791-794页

作者：夏汝杰范佳鑫陶蜀杭成都市第二人民医院检验科四川成都610000

目的:探讨单纯肥胖患儿血清25羟维生素D[25-(OH)-D]水平与营养代谢指标的相关性。方法:纳入107例单纯性肥胖的患儿为观察组;同期40名健康儿童为对照组。收集两组对象一般资料,检测并比较血清25-(OH)-D、糖代谢[空腹血糖(FPG)、糖化血红... 详细信息

目的:探讨单纯肥胖患儿血清25羟维生素D[25-(OH)-D]水平与营养代谢指标的相关性。方法:纳入107例单纯性肥胖的患儿为观察组;同期40名健康儿童为对照组。收集两组对象一般资料,检测并比较血清25-(OH)-D、糖代谢[空腹血糖(FPG)、糖化血红蛋白(HbAlc)]、脂代谢[总胆固醇(TC)、高/低密度脂蛋白胆固醇(H/LDL-C)、甘油三酯(TG)]及营养代谢[白蛋白(ALB)、前白蛋白(PA)、铁蛋白(Fer)]水平,采用Pearson相关性分析血清25-(OH)-D与各指标间相关性。结果:观察组患儿体质量、BMI、腰围、臀围、腰臀比、血清FPG、TC、TG及ALB、PA、Fer水平均明显高于对照组(P<0.05),25-(OH)-D低于对照组(P<0.05)。相关性分析显示,单纯性肥胖儿童血清25-(OH)-D水平与体质量、BMI、腰围、臀围、腰臀比、FPG、ALB、PA、Fer均呈负相关关系(P<0.05)。结论:单纯性肥胖儿童血清25-(OH)-D水平显著低于正常体质量儿童,其浓度与其体格、FPG及ALB、PA、Fer密切相关,临床应重视。

关键词：单纯性肥胖儿童 25羟维生素D 营养代谢

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表没食子儿茶素没食子酸酯在水产养殖中的应用进展

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饲料研究 2024年第3期47卷 165-169页

作者：马宁黄艳红堂格斯范嘉杰陈言峰于辉佛山科学技术学院广东省动物分子设计与精准育种重点实验室广东佛山528231 佛山科学技术学院生命科学与工程学院广东佛山528231

近年来,植物提取物因其天然性、毒副作用小以及残留少等特性在畜牧养殖中应用较多。绿茶是一种传统饮品,其所含的多酚具有多种药理活性。表没食子儿茶素没食子酸酯(EGCG)是绿茶多酚中主要的酚类活性物质,也是儿茶素中发挥药理作用的主... 详细信息

近年来,植物提取物因其天然性、毒副作用小以及残留少等特性在畜牧养殖中应用较多。绿茶是一种传统饮品,其所含的多酚具有多种药理活性。表没食子儿茶素没食子酸酯(EGCG)是绿茶多酚中主要的酚类活性物质,也是儿茶素中发挥药理作用的主要有效成分之一。EGCG具有抗氧化、抗菌、抗病毒、抗寄生虫以及增强机体免疫能力等多种生物学功能,并且具有抑制蓝藻水华、调节水质的作用,在水产养殖行业中具有广阔的应用前景。文章对EGCG的性质、提取工艺、生物学功能及其在水产养殖中的研究进展进行综述,旨在为EGCG在水产养殖中的应用提供参考。

关键词：表没食子儿茶素没食子酸酯生物学功能水产养殖

Logistic Regression Based Arc Fault Detection in Photovoltaic Systems Under Different Conditions

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Journal of Shanghai jiaotong university(Science) 2019年第4期24卷 459-470页

作者： jia fan LUO Liwen GAO Shiyue YE jian School of Electronic Information and Electrical Engineering Shanghai Jiao Tong UniversityShanghai200240China University of Michigan-Shanghai jiao Tong University Joint Institute Shanghai Jiao Tong UniversityShanghai200240China Analog Devices Inc.Shanghai200021China

This paper investigates direct current(DC) arc fault detection in photovoltaic system. In order to avoid the risk of fire ignition caused by the arc fault in the photovoltaic power supply, it is urgent to detect the DC arc fault in the photovoltaic system. Once an arc fault is detected, the power supply should be cut off immediately. A lot of field experiments are carried out to obtain the data of arc fault current of the photovoltaic system under different current conditions. Cable length, arc gap, and the effects of different sensors are *** three conditions are the most significant features of this paper. Four characteristic variables from both the time domain and the frequency domain are extracted to identify the arc fault. Then the logistic regression method in the field of artificial intelligence and machine learning is originally used to analyze the experimental results of arc fault in the photovoltaic system. The function between the probability of the arc fault and the change of the characteristic variables is obtained. After validating 80 groups of experimental data under different conditions,the accuracy rate of the arc fault detection by this algorithm is proved to reach 100%.

关键词： photovoltaic arc fault fast Fourier transform logistic regression

Characteristics of indoor/outdoor PM_(2.5) and elemental components in generic urban, roadside and industrial plant areas of Guangzhou City, China

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Journal of Environmental Sciences 2007年第1期19卷 35-43页

作者： HUANG Hong LEE Shun-cheng CAO Jun-ji ZOU Chang-wei CHEN Xin-geng fan Shao-jia School of Chemistry and Environment South China Normal University Guangzhou 510006 China Department of Civil and Structural Engineering Hong Kong Polytechnic University Hang Hum Kowloon Hong Kong Institute of Earth Environment Chinese Academy of Sciences Xi＇an 710075 China School of Environmental Science and Engineering Nanchang University Nanchang 330029 China School of Environmental Science and Engineering SunYatSen University Guangzhou 510275 China

Quantitative information on mass concentrations and other characteristics, such as spatial distribution, seasonal variation, indoor/outdoor （I/O） ratio, correlations and sources, of indoor and outdoor PM2.5 and elemental components in Guangzhou City were provided. Mass concentration of PM2.5 and elemental components were determined by standard weight method and proton-induced X-ray emission （PIXE） method. 18 elements were detected, the results showed positive results. Average indoor and outdoor PM2.5 concentrations in nine sites were in the range of 67.7-74.5μg/m^3 for summer period, and 109.9-123.7 μg/m^3 for winter period, respectively. The sum of 18 elements average concentrations were 5362.6-5533.4 ng/m^3 for summer period, and 8416.8-8900.6 ng/m^3 for winter period, respectively. Average concentrations of PM2.5 and element components showed obvious spatial characteristic, that the concentrations in roadside area and in industrial plant area were higher than those in generic urban area. An obvious seasonal variation characteristic was found for PM2.5 and elemental components, that the concentrations in winter were higher than that in summer. The I/O ratio of PM2.5 and some elemental components presented larger than 1 sometimes. According to indoor/outdoor correlation of PM2.5 and element concentrations, it was found that there were often good relationships between indoor and outdoor concentrations. Enrichment factors were calculated to evaluate anthropogenic versus natural elements sources.

关键词： PM2.5 elemental components indoor air

Spatially modulated scene illumination for intensity-compensated two-dimensional array photon-counting LiDAR imaging

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Chinese Physics B 2022年第9期31卷 238-248页

作者： jiaheng Xie Zijing Zhang Mingwei Huang jiahuan Li fan jia Yuan Zhao School of Physics Harbin Institute of TechnologyHarbin 150001China

Photon-counting LiDAR using a two-dimensional(2D)array detector has the advantages of high lateral resolution and fast acquisition *** non-uniform intensity profile of the illumination beam and non-uniform quantum efficiency of the detectors in the 2D array deteriorate the imaging ***,we propose a photon-counting LiDAR system that uses a spatial light modulator to control the spatial intensity to compensate for both the non-uniform intensity profile of the illumination beam,and the variation in the quantum efficiency of the detectors in the 2D *** using a 635 nm peak wavelength and 4 mW average power semiconductor laser,lab-based experiments at a 4.27 m stand-off distance are performed to verify the effectiveness of the proposed *** with the unmodulated method,the standard deviation of the intensity image of the proposed method is reduced from 0.109 to 0.089 for a whiteboard target,with an average signal photon number of 0.006 per pixel.

关键词： avalanche photodiode camera photon counting three-dimensional imaging array modulation