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MicroRNA-365 Knockdown Prevents Ischemic Neuronal Injury by Activating Oxidation Resistance 1-Mediated Antioxidant Signals

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Neuroscience Bulletin 2019年第5期35卷 815-825页

作者： Jia-Lin Mo Zhi-Guang Pan Xiao Chen Yu Lei ling-ling lv Cheng Qian Feng-Yan Sun Department of Neurobiology and Institute for Basic Research on Aging and Medicine School of Basic Medical Sciences Fudan University Shanghai 200032 China Department of Neurosurgery National Clinical Research Center for Aging and Medicine Huashan Hospital Shanghai Medical College Fudan University Shanghai 200032 China State Key Laboratory of Medical Neurobiology School of Basic Medical Sciences Fudan University Shanghai 200032 China Shanghai Key Laboratory of Clinical Geriatric Medicine Research Center on Aging and Medicine Shanghai Medical College Fudan University Shanghai 200032 China

Micro RNA-365(mi R-365) is upregulated in the ischemic brain and is involved in oxidative damage in the diabetic rat. However, it is unclear whether mi R-365 regulates oxidative stress(OS)-mediated neuronal damage after ischemia. Here, we used a transient middle cerebral artery occlusion model in rats and the hydrogen peroxide-induced OS model in primary cultured neurons to assess the roles of mi R-365 in neuronal damage. We found that mi R-365 exacerbated ischemic brain injury and OS-induced neuronal damage and was associated with a reduced expression of OXR1(Oxidation Resistance 1). In contrast, mi R-365 antagomir alleviated both the brain injury and OXR1 reduction. Luciferase assays indicated that mi R-365 inhibited OXR1 expression by directly targeting the 30-untranslated region of Oxr1. Furthermore, knockdown of OXR1 abolished the neuroprotective and antioxidant effects of the mi R-365 antagomir. Our results suggest that mi R-365 upregulationincreases oxidative injury by inhibiting OXR1 expression,while its downregulation protects neurons from oxidative death by enhancing OXR1-mediated antioxidant signals.

关键词： MicroRNA Ischemic stroke Neuronal damage Oxidative stress Neuroprotection

Frost deformation and microstructure evolution of porous rock under uniform and unidirectional freeze-thaw conditions

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Journal of Mountain Science 2024年第8期21卷 2855-2869页

作者： lv Zhitao LIU Jintao WAN ling LIU Weiping School of Infrastructure Engineering Nanchang UniversityNanchang 330031China College of Civil Engineering and Architecture Nanchang Hangkong UniversityNanchang 330063China

The frost deterioration and deformation of porous rock are commonly investigated under uniform freeze-thaw(FT)***,the unidirectional FT condition,which is also prevalent in engineering practice,has received limited ***,a comparative study on frost deformation and microstructure evolution of porous rock under both uniform and unidirectional FT conditions was ***,frost deformation experiments of rock were conducted under cyclic uniform and unidirectional FT action,*** illustrate that frost deformation of saturated rock exhibits isotropic characteristics under uniform FT cycles,while it shows anisotropic characteristics under unidirectional FT condition with both the frost heaving strain and residual strain along FT direction much higher than those perpendicular to FT ***,the peak value and residual value of cumulative frost strain vary as logarithmic functions with cycle number under both uniform and unidirectional FT ***,the microstructure evolution of rock suffered cyclic uniform and unidirectional FT action were *** uniform FT cycles,newly generated pores uniformly distribute in rock and pore structure of rock remains isotropic in micro scale,and thus the frost deformation shows isotropic characteristics in macro *** unidirectional FT cycles,micro-cracks or pore belts generate with their orientation nearly perpendicular to the FT direction,and rock structure gradually becomes anisotropic in micro scale,resulting in the anisotropic characteristics of frost deformation in macro scale.

关键词： Frost deformation Microstructure evolution Porous rock Unidirectional freeze-thaw cycles Uniform freeze-thaw cycles

Low power fluorine plasma effects on electrical reliability of AlGaN/GaN high electron mobility transistor

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Chinese Physics B 2017年第1期26卷 433-437页

作者： ling Yang Xiao-Wei Zhou Xiao-Hua Ma ling lv Yan-Rong Cao Jin-Cheng Zhang Yue Hao State Key Discipline Laboratory of Wide Bandgap Semiconductor Technology Xidian University Xi＇an 710071 China School of Advanced Materials and Nanotechnology Xidian University Xi＇an 710071 China School of Microelectronics Xidian University Xi＇an 710071 China School of Mechano-Electronic Engineering Xidian University Xi＇an 710071 China

The new electrical degradation phenomenon of the AlGaN/GaN high electron mobility transistor（HEMT） treated by low power fluorine plasma is discovered. The saturated current, on-resistance, threshold voltage, gate leakage and breakdown voltage show that each experiences a significant change in a short time stress, and then keeps unchangeable. The migration phenomenon of fluorine ions is further validated by the electron redistribution and breakdown voltage enhancement after off-state stress. These results suggest that the low power fluorine implant ion stays in an unstable state. It causes the electrical properties of AlGaN/GaN HEMT to present early degradation. A new migration and degradation mechanism of the low power fluorine implant ion under the off-stress electrical stress is proposed. The low power fluorine ions would drift at the beginning of the off-state stress, and then accumulate between gate and drain nearby the gate side. Due to the strong electronegativity of fluorine, the accumulation of the front fluorine ions would prevent the subsequent fluorine ions from drifting, thereby alleviating further the degradation of AlGaN/GaN HEMT electrical properties.

关键词： AlGaN/GaN HEMT low plasma power fluorine implant ion early electrical reliability

腹腔镜下病灶切除联合子宫动脉阻断术对子宫腺肌病患者NLR、CA125及TGF-β1水平的影响

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中国计划生育学杂志 2024年第7期32卷 1503-1507页

作者：习一明许梦丹刘春红吕玲解放军总医院第一医学中心北京100039

目的:探讨腹腔镜下病灶切除联合子宫动脉阻断术对子宫腺肌病患者中性粒细胞-淋巴细胞比值(NLR)、糖类抗原125(CA125)及转化生长因子1(TGF-β1)水平的影响。方法:收集2020年9月-2023年8月本院的子宫腺肌病患者210例并随机分为对照组(105... 详细信息

目的:探讨腹腔镜下病灶切除联合子宫动脉阻断术对子宫腺肌病患者中性粒细胞-淋巴细胞比值(NLR)、糖类抗原125(CA125)及转化生长因子1(TGF-β1)水平的影响。方法:收集2020年9月-2023年8月本院的子宫腺肌病患者210例并随机分为对照组(105例,腹腔镜下病灶切除术)和观察组(105例,腹腔镜下病灶切除联合子宫动脉阻断术),比较两组手术时长、术中失血量,术前术后第6个月月经量、疼痛、子宫体积、卵巢功能、NLR、CA125及TGF-β1。结果:观察组术中失血量(276±35ml)、手术时长(87±25min)均低于对照组(357±26ml、115±36 min),术后6个月月经量(12.44±2.14片/月)、疼痛VAS评分(2.06±0.62分)、子宫体积(89.47±14.25 cm3)、NLR(2.06±0.86)、CA125(20.35±2.71 KU/L)、TGF-β1(35.98±8.12 mg/L)均低于对照组(15.63±1.56片/月、2.45±0.78分、95.36±12.36 cm^(3)、2.45±0.95、24.53±2.48 KU/L、42.63±8.56 mg/L);术后1周,观察组雌二醇水平(159.36±24.71 pg/ml)低于对照组(168.47±27.06 pg/ml),黄体生成素(11.59±3.18 U/L)和卵泡刺激素(27.56±3.84 U/L)高于对照组(10.57±2.87 U/L、26.51±3.49 U/L)(均P<0.05)。术后6个月,两组性激素水平无差异,无1例复发。结论:腹腔镜下病灶切除术和腹腔镜下病灶切除联合子宫动脉阻断术均可治疗子宫腺肌病,腹腔镜下病灶切除联合子宫动脉阻断术在提高手术效率、改善痛经症状及降低NLR、CA125及TGF-β1水平,对卵巢功能的影响更优。

关键词：子宫腺肌病腹腔镜下病灶切除子宫动脉阻断术中性粒细胞-淋巴细胞比值糖类抗原125 转化生长因子1 手术指标卵巢功能复发

Robust architecture of 2D nano Mg-based borohydride on graphene with superior reversible hydrogen storage performance

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Journal of Materials Science & Technology 2023年第15期146卷 121-130页

作者： Xuancheng Wang Yuxiao Jia Xuezhang Xiao Panpan Zhou Jiapeng Bi Jiacheng Qi ling lv Fen Xu Lixian Sun Lixin Chen State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials School of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou 310013China

Efficient technical strategies to synthesize hydrides with high capacity and favorable reversibility are significant for the development of novel energy ***,nano Mg-based borohydride,Mg(BH_(4))_(2),with robust architecture was designed and prepared by confining on graphene through a solution selfconfinement *** Mg(BH_(4))_(2) confined on graphene displays a wrinkled 2D nano layer morphology within 8.8 nm *** 2D nano Mg(BH_(4))_(2) can start dehydrogenation at 67.9℃ with a high capacity of 12.0 wt.%,which is 190.5℃ lower than pristine Mg(BH_(4))_(2).The isothermal dehydrogenation tests and kinetics fitting results indicate the 2D nano Mg(BH_(4))_(2) possesses much-enhanced dehydrogenation kinetics of 31.3 kJ/mol activation energy,which is only half of pristine Mg(BH_(4))_(2).The thermodynamics of the 2D nano Mg(BH_(4))_(2) is also verified by PCT tests,of which Gibbs free energy value for the confined 2D nano Mg(BH_(4))_(2) is estimated to be-18.01 kJ/mol H_(2),lower than-16.36 kJ/mol H_(2) of pristine Mg(BH_(4))_(2).Importantly,the reversibility of the confined 2D nano Mg(BH_(4))_(2) is significantly enhanced to over 90%capacity retention with relatively kinetics stability during 10 *** mechanism analyses manifest that Mg(BH_(4))_(2) exhibits stable 2D nano morphology during 10 cyclic tests,resulting in the greatly reduced H diffusion path and the improved de/rehydrogenation kinetics of the 2D nano Mg(BH_(4))_(2).Based on theoretical calculations of Mg(BH_(4))_(2) and the intermediate MgB12H12 confined on graphene,the charge transfer status of both samples is modified to facilitate de/rehydrogenation,thus leading to the significant thermodynamic improvements of the reversible hydrogen storage performances for 2D nano Mg(BH_(4))_(2).Such investigation of the Mg-based borohydride will illuminate prospective technical research of energy storage materials.

关键词： Mg(BH_(4))_(2) Nano-confinement Kinetics Thermodynamics Reversible hydrogen storage

Effects of surface cracks on the rhizospheric microhabitat of Artemisia ordosica in subsidence area caused by coal mining

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Journal of Coal Science & Engineering(China) 2013年第2期19卷 231-236页

作者： Tao DU Yin-Li BI Fei GAO Wei-ling lv School of Geoscience and Surveying Engineering China University of Mining and Technology (Beijing) Beijing 100083China

The effects of surface cracks caused by underground coal mining on microhabitat in the rhizosphere of Artem＆ia ordosias were studied based on field investigation and sample analysis. The results show that the amounts of microorganisms, enzyme activity and water content in soil vary with the biomass ofA. ordosias, and that the account exhibits in an order of large A. ordosias〉medium A. ordosias〉small A. ordosias. Surface cracks apparently decrease microbial quantities and enzymatic ac- tivities, and change the composition and structure of microbial community in the rhizosphere of A. ordosias. Surface cracks reduce water content and electrical conductivity, enhance the R/S （ratio of root and soil） of water content, electrical conductivity and pH value, and raise the content of Na and Pb in rhizosphere soil ofA. ordosicas, It can be concluded that the disturbance of underground coal mining on the microhabitat in the rhizosphere ofA. ordosica is obvious in the early days.

关键词： rhizosphere microhabitat mining crack microbial quantity enzymatic activity Artemisia ordosica

Carbon composite support improving catalytic effect of NbC nanoparticles on the low-temperature hydrogen storage performance of MgH_(2)

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Journal of Materials Science & Technology 2023年第19期150卷 65-74页

作者： Yuxiao Jia Xuancheng Wang Leijie Hu Xuezhang Xiao Shuoqing Zhang Jiahuan He Jiacheng Qi ling lv Fen Xu Lixian Sun Lixin Chen State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou 310013China Guangxi Collaborative Innovation Center of Structure and Property for New Energy and Materials School of Material Science and EngineeringGuilin University of Electronic TechnologyGuilin 541004China

Ultrafine carbon-based transition metal compounds have been widely investigated as efficient catalysts for enhancing the hydrogen storage performance of magnesium *** this work,the carbon ther-mal shock method is applied to synthesize the ultrafine carbon-encapsulated NbC nanoparticles with an average grain size of 17.3 *** MgH_(2)-10 wt%NbC/C composites show excellent low-temperature hy-drogen storage performance with the onset dehydrogenation temperature of 196.1℃,which is 92.2℃ and 98℃ lower than that of MgH_(2)-10 wt%NbC and undoped MgH_(2),***,MgH_(2)-10 wt%NbC/C can absorb 6.71 wt%H_(2) at 100℃ within 30 min around and retain almost 100%reversible hydrogen desorption capacity after 10 *** the catalytic mechanism,the electron transfer process between multi-valence Nb cations of in-situ formed NbH x and Mg,H atoms can greatly improve the cyclic de/rehydrogenation kinetics of MgH_(2)-NbC/***,the enhancement of dehydrogenation kinetics can also be ascribed to MgH_(2) particle refinement by NbC nanoparticles,and destabilization of the Mg-H bond caused by carbon *** investigation not only proves that carbon-encapsulated NbC nanoparti-cles can greatly enhance the hydrogen storage performance of MgH_(2) but provides an idea of preparing carbon-based transition metal carbides as effective catalysts for magnesium-based hydrogen storage ma-terials.

关键词： MgH_(2) Carbon-encapsulated Nanoparticles Catalyst Kinetics

Widespread and active piezotolerant microorganisms mediate phenolic compound degradation under high hydrostatic pressure in hadal trenches

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Marine Life Science & Technology 2024年第2期6卷 331-348页

作者： Hao ling Yongxin lv Yu Zhang Ning‑Yi Zhou Ying Xu State Key Laboratory of Microbial Metabolism Joint International Research Laboratory of Metabolic and Developmental Sciences and School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200240China State Key of Laboratory of Ocean Engineering Shanghai Jiao Tong UniversityShanghai 200240China

Phenolic compounds,as well as other aromatic compounds,have been reported to be abundant in hadal *** high-throughput sequencing studies have hinted at the potential of hadal microbes to degrade these compounds,direct microbiological,genetic and biochemical evidence under in situ pressures remain ***,a microbial consortium and a pure culture of Pseudomonas,newly isolated from Mariana Trench sediments,efficiently degraded phenol under pressures up to 70 and 60 MPa,respectively,with concomitant increase in *** analyzing a high-pressure(70 MPa)culture metatranscriptome,not only was the entire range of metabolic processes under high pressure generated,but also genes encod-ing complete phenol degradation via ortho-and meta-cleavage pathways were *** isolate of Pseudomonas also contained genes encoding the complete degradation *** transcribed genes(dmpKLMNOP_(sed))were functionally identified to encode a multicomponent hydroxylase catalyzing the hydroxylation of phenol and its methylated derivatives by heterogeneous *** addition,key catabolic genes identified in the metatranscriptome of the high-pressure cultures and genomes of bacterial isolates were found to be all widely distributed in 22 published hadal microbial *** microbiological,genetic,bioinformatics,and biochemical levels,this study found that microorganisms widely found in hadal trenches were able to effectively drive phenolic compound degradation under high hydrostatic *** information will bridge a knowledge gap concerning the microbial aromatics degradation within hadal trenches.

关键词： Hadal trench High hydrostatic pressure Phenolic compounds degradation Piezotolerant microorganisms Widespread distribution

Tumor necrosis factor receptor-associated protein 1 regulates hypoxia-induced apoptosis through a mitochondria-dependent pathway mediated by cytochrome c oxidase subunit Ⅱ

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Burns & Trauma 2019年第1期7卷 139-149页

作者： Fei Xiang Si-yuan Ma Yan-ling lv Dong-xia Zhang Hua-pei Song Yue-sheng Huang Institute of Burn Research State Key Laboratory of TraumaBurns and Combined InjurySouthwest HospitalThird Military Medical University(Army Medical University)Chongqing 400038China

Background:Tumor necrosis factor receptor-associated protein 1(TRAP1)plays a protective effect in hypoxic cardiomyocytes,but the precise mechanisms are not well *** study is aimed to identify the mechanism of TRAP1 on hypoxic damage in ***:In this study,the effects of TRAP1 and cytochrome c oxidase subunit Ⅱ(COXⅡ)on apoptosis in hypoxia-induced cardiomyocytes were explored using overexpression and knockdown methods ***:Hypoxia induced cardiomyocyte apoptosis,and TRAP1 overexpression notably inhibited apoptosis induced by ***,TRAP1 silencing promoted apoptosis in hypoxic *** investigation revealed that the proapoptotic effects caused by the silencing of TRAP1 were prevented by COXⅡ overexpression,whereas COXⅡ knockdown reduced the antiapoptotic function induced by TRAP1 ***,changes in the release of cytochrome c from mitochondria into the cytosol and the caspase-3 activity in the cytoplasm,as well as reactive oxygen species production,were found to be correlated with the changes in ***:The current study uncovered that TRAP1 regulates hypoxia-induced cardiomyocyte apoptosis through a mitochondria-dependent apoptotic pathway mediated by COXⅡ,in which reactive oxygen species presents as an important component.

关键词： Cardiomyocytes Hypoxia Tumor necrosis factor receptor-associated protein 1 Cytochrome c oxidase subunitⅡ Reactive oxygen species Apoptosis