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Effects and mechanisms of store-operated calcium channel blockade on hepatic ischemia-reperfusion injury in rats

World Journal of Gastroenterology 2012年第4期18卷 356-367页

作者： Li-Jie Pan,Zi-Chao zhang,Zhen-ya zhang,Zong-ming zhang,Department of General Surgery,Digestive Medical Center,The First Affiliated Hospital,School of Medicine,Tsinghua University,Beijing 100016,China Wen-Jun Wang,Yue Xu,Xuyue (Beijing) Science and Technology Co.,Ltd.,Haidian District,Beijing 100080,China Li-Jie Pan Zi-Chao Zhang Zhen-Ya Zhang Zong-Ming Zhang Department of General Surgery Digestive Medical Center The First Affiliated Hospital School of Medicine Tsinghua University Beijing 100016 China Wen-Jun Wang Yue Xu Xuyue (Beijing) Science and Technology Co. Ltd. Haidian District Beijing 100080 China

AIM:To further investigate the important role of store-operated calcium channels (SOCs) in rat hepatocytes and to explore the effects of SOC blockers on hepatic ischemia-reperfusion injury (HIRI).METHODS:Using freshly isolated hepatocytes from a rat model of HIRI (and controls),we measured cyto-solic free Ca 2+ concentration (by calcium imaging),net Ca 2+ fluxes (by a non-invasive micro-test technique),the SOC current (I SOC ;by whole-cell patch-clamp record-ing),and taurocholate secretion [by high-performance liquid chromatography and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assays].RESULTS:Ca 2+ oscillations and net Ca 2+ fluxes medi-ated by Ca 2+ entry via SOCs were observed in rat he-patocytes.I SOC was significantly higher in HIRI groups than in controls (57.0 ± 7.5 pA vs 31.6 ± 2.7 pA,P <0.05) and was inhibited by La 3+.Taurocholate secretion by hepatocytes into culture supernatant was distinctly lower in HIRI hepatocytes than in controls,an effect reversed by SOC ***:SOCs are pivotal in *** blockers protected against HIRI and assisted the recovery of se-cretory function in ***,they are likely to become a novel class of effective drugs for prevention or therapy of HIRI patients in the future.

关键词： Hepatocyte Hepatic ischemia-reperfusion injury Store-operated calcium channel Non-invasive micro-test technique

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Comparative proteomic analysis of plasma exosomes reveals the functional contribution of N-acetyl-alpha-glucosaminidase to Parkinson’s disease

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Neural Regeneration Research 2025年第10期20卷 2998-3012页

作者： Yuan Zhao Yidan zhang Xin Liu Jian zhang ya Gao Shuyue Li Cui Chang Xiang Liu Guofeng yang Department of Geriatrics Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Department of Neurosurgery The Second Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina

Parkinson’s disease is the second most common progressive neurodegenerative disorder,and few reliable biomarkers are available to track disease *** proteins,DNA,mRNA,and lipids carried by exosomes reflect intracellular changes,and thus can serve as biomarkers for a variety of *** this study,we investigated alterations in the protein content of plasma exosomes derived from patients with Parkinson’s disease and the potential therapeutic roles of these proteins in Parkinson’s *** a tandem mass tag-based quantitative proteomics approach,we characterized the proteomes of plasma exosomes derived from individual patients,identified exosomal protein signatures specific to patients with Parkinson’s disease,and identified N-acetyl-alpha-glucosaminidase as a differentially expressed protein.N-acetyl-alpha-glucosaminidase expression levels in exosomes from the plasma of patients and healthy controls were validated by enzyme-linked immunosorbent assay and western *** results demonstrated that the exosomal N-acetyl-alpha-glucosaminidase concentration was not only lower in Parkinson’s disease,but also decreased with increasing Hoehn-yahr stage,suggesting that N-acetyl-alpha-glucosaminidase could be used to rapidly evaluate Parkinson’s disease ***,western blot and immunohistochemistry analysis showed that N-acetyl-alpha-glucosaminidase levels were markedly reduced both in cells treated with 1-methyl-4-phenylpyridinium and cells overexpressingα-synuclein compared with control ***,N-acetyl-alpha-glucosaminidase overexpression significantly increased cell viability and inhibitedα-synuclein expression in 1-methyl-4-phenylpyridinium-treated *** together,our findings demonstrate for the first time that exosomal N-acetyl-alpha-glucosaminidase may serve as a biomarker for Parkinson’s disease diagnosis,and that N-acetyl-alpha-glucosaminidase may reduceα-synuclein expression and 1-methyl-4-phenylpyridinium-induced n

关键词： biomarker diagnosis exosomes N-acetyl-alpha-glucosaminidase Parkinson’s disease proteomic α-synuclein

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Investigation of bubbles escape behavior from low basicity mold flux for high-Mn high-Al steels using 3D X-ray microscope

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 102-110页

作者： Qiang Liu Xiang Li Shen Du ming Gao yanbin Yin Jiongming zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

During the continuous casting process of high-Mn high-Al steels,various types of gases such as Ar need to escape through the top of the *** which,the behavior of bubbles traversing the liquid slag serves as a restrictive link,closely associated with viscosity and the thickness of liquid *** contrast to two-dimensional surface observation,three-dimensional(3D)analysis method can offer a more intuitive,accurate,and comprehensive ***,this study employs a 3D X-ray microscope(3D-XRM)to obtained spatial distribution and 3D morphological characteristics of residual bubbles in mold flux under different basicity of liquid slag,different temperatures,and different holding *** results indicate that as basicity of slag increases from 0.52 to 1.03,temperature increases from 1423 to 1573 K,the viscosity of slag decreases,the floating rate of bubbles *** addition,when holding time increases from 10 to 30 s,the bubbles floating distance increases,and the volume fraction and average equivalent sphere diameter of the bubbles solidified in the mold flux gradually *** one word,increasing the basicity,temperature,and holding time leading to an increase in the removal rate of bubbles especially for the *** findings of bubbles escape behavior provide valuable insights into optimizing low basicity mold flux for high-Mn high-Al steels.

关键词： mold flux low basicity bubbles three-dimensional X-ray microscope viscosity

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胡杨叶片水分含量的近红外光谱检测

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光谱学与光谱分析 2017年第11期37卷 3419-3423页

作者：白铁成王亚明张楠楠姚娜喻彩丽王兴鹏塔里木大学信息工程学院新疆阿拉尔843300 University of Liege-Gembloux Agro-Bio Tech Gembloux 25030Belgium 塔里木大学水利与建筑工程学院新疆阿拉尔843300 中国农业科学院农田灌溉研究所河南新乡453000

胡杨叶片水分含量是评价胡杨健康状况的重要指标。光谱检测法是一种常用的手段,但在近红外光谱的测量过程中,在一定程度上必然受到仪器噪声、摆放形态差异和环境的干扰,为避免噪声、散射对近红外光谱的影响,减少数据维数,采用多元散射校... 详细信息

胡杨叶片水分含量是评价胡杨健康状况的重要指标。光谱检测法是一种常用的手段,但在近红外光谱的测量过程中,在一定程度上必然受到仪器噪声、摆放形态差异和环境的干扰,为避免噪声、散射对近红外光谱的影响,减少数据维数,采用多元散射校正(MSC)算法对原始光谱数据进行预处理,去除散射和基线漂移的影响,增加了光谱数据的信噪比,使有效光谱信息较为明显,谱带特征得到加强,有利于特征波长的选择。为降低模型的复杂度,防止过拟合现象,减小共线性影响,利用连续投影算法(SPA)进行特征变量选择,并通过多元线性回归模型,分析各个波长模拟的残差平方,评价各个波长的贡献,剔除贡献较小的波长,最终获得用于建模的特征波长,改善建模条件。最后使用偏最小二乘回归算法建立胡杨叶片水分含量检测模型。实验表明,直接使用原始光谱,利用SPA算法筛选变量个数为6个,模型预测精度为90.144%,相关系数r=0.674 24,RMSE=0.021 434,MSC处理后,利用SPA算法选定最终变量数为5个,预测精度为97.734%,相关系数r=0.781 63,RMSE=0.016 776。MSC和SPA算法有效的消除了散射噪声、减小了共线性干扰,模型的预测精度和相关性增加,误差减小,可用于胡杨叶片水分的快速无损检测,而且对其他作物叶片水分检测也具有一定的借鉴意义。

关键词：近红外光谱多元散射校正连续投影算法偏最小二乘回归水分

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MoS_(2)Lubricate‑Toughened MXene/ANF Composites for Multifunctional Electromagnetic Interference Shielding

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Nano-Micro Letters 2025年第2期17卷 358-371页

作者： Jiaen Wang Wei ming Longfu Chen Tianliang Song Moxi Yele Hao zhang Long yang Gegen Sarula Benliang Liang Luting yan Guangsheng Wang School of Physical Science and Engineering Beijing Jiaotong UniversityBeijing 100044People’s Republic of China Key Laboratory of Bio‑Inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang UniversityBeijing 100191People’s Republic of China

The design and fabrication of high toughness electromagnetic interference(EMI)shielding composite films with diminished reflection are an imperative task to solve electromagnetic pollution *** MXene/ANF(aramid nanofibers)–MoS_(2)composite films with nacre-like layered structure here are fabricated after the introduction of MoS_(2)into binary MXene/ANF composite *** introduction of MoS_(2)fulfills an impressive“kill three birds with one stone”improvement effect:lubrication toughening mechanical performance,reduction in secondary reflection pollution of electromagnetic wave,and improvement in the performance of photothermal *** the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 50:50),the strain to failure and tensile strength increase from 22.1±1.7%and 105.7±6.4 MPa and to 25.8±0.7%and 167.3±9.1 MPa,*** toughness elevates from 13.0±4.1 to 26.3±0.8 MJ m^(−3)(~102.3%)*** the reflection shielding effectiveness(SE_(R))of MXene/ANF(mass ratio of 50:50)decreases~10.8%.EMI shielding effectiveness(EMI SE)elevates to 41.0 dB(8.2–12.4 GHz);After the introduction of MoS_(2)into binary MXene/ANF(mass ratio of 60:40),the strain to failure increases from 18.3±1.9%to 28.1±0.7%(~53.5%),the SE_(R)decreases~22.2%,and the corresponding EMI SE is 43.9 *** MoS_(2)also leads to a more efficient photothermal conversion performance(~45 to~55℃).Additionally,MXene/ANF–MoS_(2)composite films exhibit excellent electric heating performance,quick temperature elevation(15 s),excellent cycle stability(2,2.5,and 3 V),and long-term stability(2520 s).Combining with excellent mechanical performance with high MXene content,electric heating performance,and photothermal conversion performance,EMI shielding ternary MXene/ANF–MoS_(2)composite films could be applied in many industrial *** work broadens how to achieve a balance between mechanical properties and versatility of composites in the case of high-function fillers.

关键词： MXene-MoS_(2) Lubrication toughening EMI shielding Photothermal conversion Electric heating performance

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二氧化碳/环氧丙烷/马来酸酐三元共聚物对PPC/PHB共混物力学性能的影响

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高分子学报 2015年第1期25卷 106-112页

作者：张亚明高凤翔周庆海秦玉升王献红王佛松中国科学院生态环境材料高分子重点实验室中国科学院长春应用化学研究所长春130022 中国科学院大学北京100049

采用稀土三元催化剂制备了二氧化碳-环氧丙烷-马来酸酐三元共聚物(PPCMA).用红外和核磁谱图确定了PPCMA的结构及马来酸酐单元的含量,3 wt%马来酸酐投料量的PPCMA(共聚物中马来酸酐单元含量4.1%)的玻璃化转变温度(Tg)和起始热分解温度(Td... 详细信息

采用稀土三元催化剂制备了二氧化碳-环氧丙烷-马来酸酐三元共聚物(PPCMA).用红外和核磁谱图确定了PPCMA的结构及马来酸酐单元的含量,3 wt%马来酸酐投料量的PPCMA(共聚物中马来酸酐单元含量4.1%)的玻璃化转变温度(Tg)和起始热分解温度(Td-5%)分别为13.4℃和217℃,拉伸强度为2.88 MPa,断裂伸长率为1669%,与二氧化碳-环氧丙烷共聚物(PPC)相比,引入少量马来酸酐的PPCMA有望成为一种韧性材料,并可对PPC和聚3-羟基丁酸酯(PHB)共混体系进行改性.当在PPC/PHB共混体系中添加10 wt%的PPCMA时,所得共混材料的拉伸强度为18.2 MPa,断裂伸长率则提高到85%,较没有添加PPCMA的样品提高了4.25倍,因此PPCMA的加入能有效提高PPC/PHB共混体系的韧性,改善PPC/PHB共混体系的力学性能.偏光显微镜的研究表明PPC/PHB共混体系加入PPCMA后,很快形成大量尺寸小的PHB球晶,且结晶速度大幅度提高,因此PPCMA在一定意义上可视为一种特殊的"成核剂".

关键词：二氧化碳马来酸酐三元共聚物力学性能

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粘性流体绕流圆管的边界层厚度的局部相似性解法

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水动力学研究与进展（A辑） 2001年第3期16卷 330-333页

作者：孙奉仲史月涛平亚明张鸣远山东大学能源与动力工程山东济南250061 西安交通大学陕西西安710049

本文分析了粘性流体绕流圆管时边界层厚度的一种局部相似性解法。根据相似性解原理 ,将流体在圆管上形成的二元曲面转化为若干段 ,把每一段近似处理成一个楔形体斜面 ,把相似性解用于每一段 ,并考虑界面上的修正 ,就可以得到边界层的物... 详细信息

本文分析了粘性流体绕流圆管时边界层厚度的一种局部相似性解法。根据相似性解原理 ,将流体在圆管上形成的二元曲面转化为若干段 ,把每一段近似处理成一个楔形体斜面 ,把相似性解用于每一段 ,并考虑界面上的修正 ,就可以得到边界层的物理参数。计算表明 ,这种方法是可行的。

关键词：粘性流体边界层相似性绕流圆管

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Cortico-striatal gamma oscillations are modulated by dopamine D3 receptors in dyskinetic rats

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Neural Regeneration Research 2025年第4期20卷 1164-1177页

作者： Pengfei Wang Yuewei Bi Min Li Jiazhi Chen Zhuyong Wang Huantao Wen ming Zhou Minjie Luo Wangming zhang Neurosurgery Center Department of Pediatric NeurosurgeryGuangdong Provincial Key Laboratory on Brain Function Repair and RegenerationZhujiang HospitalSouthern Medical UniversityGuangzhouGuangdong ProvinceChina

Long-term levodopa administration can lead to the development of levodopa-induced *** oscillations are a widely recognized hallmark of abnormal neural electrical activity in levodopa-induced ***,studies have reported increased oscillation power in cases of levodopa-induced ***,little is known about how the other electrophysiological parameters of gamma oscillations are altered in levodopa-induced ***,the role of the dopamine D3 receptor,which is implicated in levodopa-induced dyskinesia,in movement disorder-related changes in neural oscillations is *** found that the cortico-striatal functional connectivity of beta oscillations was enhanced in a model of Parkinson’s ***,levodopa application enhanced cortical gamma oscillations in cortico-striatal projections and cortical gamma aperiodic components,as well as bidirectional primary motor cortex(M1)↔dorsolateral striatum gamma *** of PD128907(a selective dopamine D3 receptor agonist)induced dyskinesia and excessive gamma oscillations with a bidirectional M1↔dorsolateral striatum ***,administration of PG01037(a selective dopamine D3 receptor antagonist)attenuated dyskinesia,suppressed gamma oscillations and cortical gamma aperiodic components,and decreased gamma causality in the M1→dorsolateral striatum *** findings suggest that the dopamine D3 receptor plays a role in dyskinesia-related oscillatory activity,and that it has potential as a therapeutic target for levodopa-induced dyskinesia.

关键词： aperiodic components dopamine D3 receptor dorsolateral striatum functional connectivity gamma oscillations levodopa-induced-dyskinesia local field potentials neuromodulation Parkinson’s disease primary motor cortex

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IDENTRFCATION OF A NEW TRITERPENOIDS FROM THE RHIZOME OF POTENTILIA ANSERINA *** SEVERL METHODS OF ANALYTICALI CHEMISTRY AND APPLIED SPECTROSCOPY

IDENTRFCATION OF A NEW TRITERPENOIDS FROM THE RHIZOME OF POT...

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中华中医药学会中药化学分会2006年度学术研讨会

作者： Guang-ming~1 CAI Xia-Hong~1 yan-Ling ZHAO~1 Fang CHEN~1 ya-ming zhang~1 Institute of Chinese Medicine,302 Hospital of PLA Beijing,100039,China 1 Cong-Yuan GAO~2 (Pking Univisity,Analytical center of Medicine and Heilthy Beijing,100083,China) 2

A new ursane-galactoside was isolated from the rhizomes of Potentilla anserine along with 2 known ursane-and oleanane-type triterpene *** structures of these compounds were established on the basis of spectral characteristics and chemical *** novel compound was identified as 2α,3β,19β-trihydroxyurs-12-en-28-oic acidβ-D-galactonopyranesyl ester by instrument of UV,IR,NMR,MS X-ray diffraction ***.

关键词： Index-Potentilla anserine L. rhizome triterpenoid saponins 2α,3β,19α-trihydroxyolean-12-en-28-oic acidβ-D-glucopyranosyl ester 2α,3β,19β-trihydroxyurs-12-en-28-oic acidβ-D-galactonopyranesyl ester 2-oxo-3β,19α-dihydroxyurs-12-en-28-oic acidβ-D-glucopyranosyl ester.13CNMR 13CNMR MS

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MBL抑制Jurkat细胞增殖和分泌IL-2

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现代免疫学 2010年第6期30卷 448-452页

作者：王明永张雅妮雷鸣张丽芸卢晓陈政良南方医科大学免疫学教研室广州510515

甘露聚糖结合凝集素（MBL）在天然免疫中起关键作用,但其对T淋巴细胞介导获得性免疫应答是否有影响尚不得而知。用非特异性刺激物PHA、PMA及ionomycin活化人T淋巴细胞株Jurkat细胞,ELISA和流式细胞术检测MBL与Jur-kat细胞的结合能力,WS... 详细信息

甘露聚糖结合凝集素（MBL）在天然免疫中起关键作用,但其对T淋巴细胞介导获得性免疫应答是否有影响尚不得而知。用非特异性刺激物PHA、PMA及ionomycin活化人T淋巴细胞株Jurkat细胞,ELISA和流式细胞术检测MBL与Jur-kat细胞的结合能力,WST-1和ELISA分析MBL对PHA、PMA及ionomycin活化Jurkat细胞的增殖及分泌细胞因子IL-2的影响。结果显示：MBL可结合PHA/PMA活化的Jurkat细胞,与未活化Jurkat细胞结合微弱;高浓度MBL（10~20mg/L）能以浓度依赖的方式抑制PHA/PMA活化的Jurkat细胞增殖,加入外源IL-2不能逆转这种作用;高浓度MBL（10~20 mg/L）能抑制PMA/ionomycin活化的Jurkat细胞分泌细胞因子IL-2,且呈剂量依赖关系。提示MBL可能在调节T细胞介导的获得性免疫应答中起一定作用。

关键词：甘露聚糖结合凝集素 Jurkat细胞 T淋巴细胞免疫调节

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