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Selenocysteine antagonizes oxygen glucose deprivation-induced damage to hippocampal neurons

Neural Regeneration Research 2018年第8期13卷 1433-1439页

作者： Xian-Jun Wang Mei-Hong Wang Xiao-Ting Fu Ya-Jun Hou Wang chen da-chen tian Su-Yun Bai Xiao-Yan Fu Department of Neurology People's Hospital of Linyi Linyi Shandong Province China Department of Neurology People's Hospital of Yishui Linyi Shandong Province China School of Basic Medicine Taishan Medical University Taian Shandong Province China

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.

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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Li-Mg-N-H体系储氢材料的热力学和动力学调控

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化学进展 2016年第12期28卷 1788-1797页

作者：李超范美强陈海潮陈达田光磊舒康颖中国计量大学材料科学与工程学院杭州310018 浙江大学硅材料国家重点实验室杭州310027

Mg(NH_2)_2-2LiH体系储氢材料具有较高的储氢容量和较适宜的热力学性能,并且其吸放氢过程完全可逆,是目前最有望实现大规模应用的固态储氢材料之一。然而,由于该体系在吸放氢过程中具有较高的动力学壁垒,导致其在200℃以上才能实现快速... 详细信息

Mg(NH_2)_2-2LiH体系储氢材料具有较高的储氢容量和较适宜的热力学性能,并且其吸放氢过程完全可逆,是目前最有望实现大规模应用的固态储氢材料之一。然而,由于该体系在吸放氢过程中具有较高的动力学壁垒,导致其在200℃以上才能实现快速地吸放氢。因此,国际上对该体系储氢材料的研究主要集中在热力学和动力学的调控方面。本文从成分调变、纳米化和掺杂改性等方面,详细综述了Mg(NH_2)_2-2LiH体系储氢材料热力学和动力学调控的研究现状,并提出了其中存在的问题和相应对策,同时指出了将来的研究方向。

关键词：储氢材料热力学动力学氨基物氢化物性能调控

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Transforming growth factor-beta 1 enhances discharge activity of cortical neurons

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Neural Regeneration Research 2025年第2期20卷 548-556页

作者： Zhihui Ren tian Li Xueer Liu Zelin Zhang Xiaoxuan chen Weiqiang chen Kangsheng Li Jiangtao Sheng Department of Microbiology and Immunology Guangdong Provincial Key Laboratory of Infectious Diseases and Molecular ImmunopathologyShantou University Medical CollegeShantouGuangdong ProvinceChina Department of Neurosurgery First Affiliated Hospital of Shantou University Medical CollegeShantouGuangdong ProvinceChina

Transforming growth factor-beta 1(TGF-β1)has been extensively studied for its pleiotropic effects on central nervous system *** neuroprotective or neurotoxic effects of TGF-β1 in specific brain areas may depend on the pathological process and cell types ***-gated sodium channels(VGSCs)are essential ion channels for the generation of action potentials in neurons,and are involved in various neuroexcitation-related ***,the effects of TGF-β1 on the functional properties of VGSCs and firing properties in cortical neurons remain *** this study,we investigated the effects of TGF-β1 on VGSC function and firing properties in primary cortical neurons from *** found that TGF-β1 increased VGSC current density in a dose-and time-dependent manner,which was attributable to the upregulation of Nav1.3 *** VGSC current density and Nav1.3 expression were significantly abolished by preincubation with inhibitors of mitogen-activated protein kinase kinase(PD98059),p38 mitogen-activated protein kinase(SB203580),and Jun NH2-terminal kinase 1/2 inhibitor(SP600125).Interestingly,TGF-β1 significantly increased the firing threshold of action potentials but did not change their firing rate in cortical *** findings suggest that TGF-β1 can increase Nav1.3 expression through activation of the ERK1/2-JNK-MAPK pathway,which leads to a decrease in the firing threshold of action potentials in cortical neurons under pathological ***,this contributes to the occurrence and progression of neuroexcitatory-related diseases of the central nervous system.

关键词： central nervous system cortical neurons ERK firing properties JNK Nav1.3 p38 transforming growth factor-beta 1 traumatic brain injury voltage-gated sodium currents

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Alternative Strategy for Development of Dielectric Calcium Copper Titanate‑Based Electrolytes for Low‑Temperature Solid Oxide Fuel Cells

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Nano-Micro Letters 2025年第1期17卷 310-332页

作者： Sajid Rauf Muhammad Bilal Hanif Zuhra Tayyab Matej Veis MAKYousaf Shah Naveed Mushtaq Dmitry Medvedev Yibin tian chen Xia Martin Motola Bin Zhu College of Mechatronics and Control Engineering Shenzhen UniversityShenzhen 518060People’s Republic of China Department of Inorganic Chemistry Faculty of Natural SciencesComenius University BratislavaIlkovicova684215 BratislavaSlovakia Energy Storage Joint Research Center School of Energy and EnvironmentSoutheast UniversityNanjing 210096People’s Republic of China Hydrogen Energy Laboratory Ural Federal University620002 EkaterinburgRussia Laboratory of Electrochemical Devices Based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry620066 EkaterinburgRussia School of Microelectronics Hubei UniversityWuhan 430062People’s Republic of China

The development of low-temperature solid oxide fuel cells(LT-SOFCs)is of significant importance for realizing the widespread application of *** has stimulated a substantial materials research effort in developing high oxide-ion conductivity in the electrolyte layer of *** this context,for the first time,a dielectric material,CaCu_(3)Ti_(4)O_(12)(CCTO)is designed for LT-SOFCs electrolyte application in this *** individual CCTO and its heterostructure materials with a p-type Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ)(NCAL)semiconductor are evaluated as alternative electrolytes in LT-SOFC at 450–550℃.The single cell with the individual CCTO electrolyte exhibits a power output of approximately 263 mW cm^(-2) and an open-circuit voltage(OCV)of 0.95 V at 550℃,while the cell with the CCTO–NCAL heterostructure electrolyte capably delivers an improved power output of approximately 605 mW cm^(-2) along with a higher OCV over 1.0 V,which indicates the introduction of high hole-conducting NCAL into the CCTO could enhance the cell performance rather than inducing any potential short-circuiting *** is found that these promising outcomes are due to the interplay of the dielectric material,its structure,and overall properties that led to improve electrochemical mechanism in CCTO–***,density functional theory calculations provide the detailed information about the electronic and structural properties of the CCTO and NCAL and their heterostructure CCTO–*** study thus provides a new approach for developing new advanced electrolytes for LT-SOFCs.

关键词： LT-SOFCs Dielectric CaCu_(3)Ti_(4)O_(12) Semiconductor Ni_(0.8)Co_(0.15)Al_(0.05)LiO_(2−δ) Ionic conductivity Heterostructure electrolyte

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复方玄驹胶囊联合克罗米芬治疗多囊卵巢综合征临床观察

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海南医学 2011年第4期22卷 47-48页

作者：牛向馨陈达天琼海市中医院海南琼海571400

目的观察复方玄驹胶囊联合克罗米芬治疗多囊卵巢综合征(PCOS)不孕的临床疗效。方法复方玄驹胶囊联合克罗米芬治疗PCOS所致不孕(属肾阳虚型)患者30例,与单用克罗米芬促排卵治疗PCOS所致不孕(属肾阳虚型)30例对照。结果试验组在改善肾阳... 详细信息

目的观察复方玄驹胶囊联合克罗米芬治疗多囊卵巢综合征(PCOS)不孕的临床疗效。方法复方玄驹胶囊联合克罗米芬治疗PCOS所致不孕(属肾阳虚型)患者30例,与单用克罗米芬促排卵治疗PCOS所致不孕(属肾阳虚型)30例对照。结果试验组在改善肾阳虚方面优于对照组,促进排卵和妊娠方面,试验组略高于对照组,但两组差异无显著意义。结论复方玄驹胶囊联合克罗米芬治疗肾阳虚型多囊卵巢综合征不孕效果优于单用克罗米芬治疗。

关键词：多囊卵巢综合征不孕症肾阳虚证复方玄驹胶囊克罗米芬

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Recent progress in the applications of presynaptic dopaminergic positron emission tomography imaging in parkinsonism

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Neural Regeneration Research 2025年第1期20卷 93-106页

作者： Yujie Yang Xinyi Li Jiaying Lu Jingjie Ge Mingjia chen Ruixin Yao Mei tian Jian Wang Fengtao Liu Chuantao Zuo Key Laboratory of Arrhythmias Ministry of EducationDepartment of Medical GeneticsShanghai East HospitalSchool of MedicineTongji UniversityShanghaiChina Department of Neurology National Research Center for Aging and MedicineNational Center for Neurological Disordersand State Key Laboratory of Medical NeurobiologyHuashan HospitalFudan UniversityShanghaiChina Department of Nuclear Medicine&PET Center National Center for Neurological Disordersand National Clinical Research Center for Aging and MedicineHuashan HospitalFudan UniversityShanghaiChina International Human Phenome Institutes(Shanghai) ShanghaiChina Human Phenome Institute Fudan UniversityShanghaiChina

Nowadays,presynaptic dopaminergic positron emission tomography,which assesses deficiencies in dopamine synthesis,storage,and transport,is widely utilized for early diagnosis and differential diagnosis of *** review provides a comprehensive summary of the latest developments in the application of presynaptic dopaminergic positron emission tomography imaging in disorders that manifest *** conducted a thorough literature search using reputable databases such as PubMed and Web of *** criteria involved identifying peer-reviewed articles published within the last 5 years,with emphasis on their relevance to clinical *** findings from these studies highlight that presynaptic dopaminergic positron emission tomography has demonstrated potential not only in diagnosing and differentiating various Parkinsonian conditions but also in assessing disease severity and predicting ***,when employed in conjunction with other imaging modalities and advanced analytical methods,presynaptic dopaminergic positron emission tomography has been validated as a reliable in vivo *** validation extends to screening and exploring potential neuropathological mechanisms associated with dopaminergic *** summary,the insights gained from interpreting these studies are crucial for enhancing the effectiveness of preclinical investigations and clinical trials,ultimately advancing toward the goals of neuroregeneration in parkinsonian disorders.

关键词： aromatic amino acid decarboxylase brain imaging dopamine transporter Parkinson’s disease parkinsonism positron emission tomography presynaptic dopaminergic function vesicle monoamine transporter type 2

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预设计锚蛋白重复蛋白及其应用进展

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药物生物技术 2017年第4期24卷 349-352页

作者：余潇潇宋潇达陈晓菲田浤高向东中国药科大学江苏省生物药物成药性研究重点实验室生命科学与技术学院江苏南京210009

预设计锚蛋白重复蛋白daRPins(Designed ankyrin repeat proteins),是一类衍生自天然锚蛋白重复序列的新型结合蛋白。由于其分子质量小,高效力,高稳定性,高亲和力和具备柔性结构等诸多特点而广受关注。daRPin蛋白在生化研究和临床治疗... 详细信息

预设计锚蛋白重复蛋白daRPins(Designed ankyrin repeat proteins),是一类衍生自天然锚蛋白重复序列的新型结合蛋白。由于其分子质量小,高效力,高稳定性,高亲和力和具备柔性结构等诸多特点而广受关注。daRPin蛋白在生化研究和临床治疗领域有着极大的应用价值。从daRPin结构的发现到daRPin药物候选分子进入临床,已有十几年的时间。该文总结了daRPin结构与功能特点,并阐述了其在生物医药与免疫治疗领域的应用情况,以期为相关领域的科研人员提供有价值的参考。

关键词：设计锚蛋白重复蛋白骨架蛋白类抗体蛋白小分子蛋白结构与功能免疫治疗靶向治疗

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等离子体改性聚酰亚胺热老化的分子模拟

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原子与分子物理学报 2025年第1期42卷 95-100页

作者：丁璨田浩博陈琛三峡大学电气与新能源学院宜昌443002

通过反应分子动力学方法模拟聚酰亚胺的热老化过程,以模拟仿真等离子体改性后的聚酰亚胺材料在热裂解后的性能变化情况.通过研究老化过程中气体产生的情况,研究发现随着温度升高,分子链之间的相互作用力减弱,导致材料的致密性下降,弹性... 详细信息

通过反应分子动力学方法模拟聚酰亚胺的热老化过程,以模拟仿真等离子体改性后的聚酰亚胺材料在热裂解后的性能变化情况.通过研究老化过程中气体产生的情况,研究发现随着温度升高,分子链之间的相互作用力减弱,导致材料的致密性下降,弹性模量降低,材料抵抗外应力的能力减弱.同时,由于温度升高使得聚酰亚胺材料相对介电常数上升,材料绝缘性能下降,击穿强度也被削弱.

关键词：反应分子动力学聚酰亚胺热老化

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Research status and prospects of the fractal analysis of metal material surfaces and interfaces

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 20-38页

作者： Qinjin dai Xuefeng Liu Xin Ma Shaojie tian Qinghe Cui Beijing Advanced Innovation Center for Materials Genome Engineering University of Science and Technology BeijingBeijing 100083China Beijing Laboratory of Metallic Materials and Processing for Modern Transportation University of Science and Technology BeijingBeijing 100083China Laboratory for Advanced Materials Processing of Ministry of Education University of Science and Technology BeijingBeijing 100083China School of Mechanical and Electrical Engineering Xinjiang Institute of EngineeringUrumqi 830023China

As a mathematical analysis method,fractal analysis can be used to quantitatively describe irregular shapes with self-similar or self-affine *** analysis has been used to characterize the shapes of metal materials at various scales and *** methods make it difficult to quantitatively describe the relationship between the regular characteristics and properties of metal material surfaces and ***,fractal analysis can be used to quantitatively describe the shape characteristics of metal materials and to establish the quantitative relationships between the shape characteristics and various properties of metal *** the perspective of two-dimensional planes and three-dimensional curved surfaces,this paper reviews the current research status of the fractal analysis of metal precipitate interfaces,metal grain boundary interfaces,metal-deposited film surfaces,metal fracture surfaces,metal machined surfaces,and metal wear *** relationship between the fractal dimensions and properties of metal material surfaces and interfaces is *** from three perspectives of fractal analysis,namely,research scope,image acquisition methods,and calculation methods,this paper identifies the direction of research on fractal analysis of metal material surfaces and interfaces that need to be *** is believed that revealing the deep influence mechanism between the fractal dimensions and properties of metal material surfaces and interfaces will be the key research direction of the fractal analysis of metal materials in the future.

关键词： metal material surfaces and interfaces fractal analysis fractal dimension homogeneity

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小班化背景下的人体寄生虫学教学模式探讨

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热带医学杂志 2016年第11期16卷 1476-1479页

作者：陈达丽田玉陈琦伟王雅静陈建平四川大学基础医学与法医学院寄生虫学教研室四川成都610041

医学院校教学改革是学校发展的需要,也是培养高素质人才的需要。人体寄生虫学学科的发展,在当前世界各国均未受到应有的重视,导致人体寄生虫学教学未能如其他学科那样蓬勃发展。在课时减少,内容增加的情况下,学生更不易掌握知识。笔者... 详细信息

医学院校教学改革是学校发展的需要,也是培养高素质人才的需要。人体寄生虫学学科的发展,在当前世界各国均未受到应有的重视,导致人体寄生虫学教学未能如其他学科那样蓬勃发展。在课时减少,内容增加的情况下,学生更不易掌握知识。笔者在人体寄生虫学教学中,针对小班化教学的特点,采用了互动式教学、基于病例的教学、以问题学习为基础的教学、将最新科研成果应用于教学、将科研活动与教学相结合以及第二课堂活动等教学方法,取得了很好的效果。

关键词：小班化教学 PBL教学 CBL教学第二课堂

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