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Cloning of rat sp56, the homologue of mouse sperm ZP3 receptor-sp56

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Cell Research 2003年第2期13卷 121-129页

作者： ss KOIDE The Population Council Center for Biomedical Research 1230 York Avenue New York New York 100021 USA

Mouse sp56 is considered as one of the candidates for mouse zona pellucida 3 (mZP3) receptor. Up to date, its homologue has only been cloned from guinea pig. namely AM67. Based on the cDNA sequence of mouse sp56, we designed a pair of primer to amplify its homologue from rat testis cDNA. Using RT-PCR, two fragments of 743 bp and 938 bp were amplified. The PCR products show very high homology to mouse sp56. However, the 743 bp product completely lacks one of the seven Sushi domains of mouse sp56. Using the 743 bp product as the probe to detect the expression profile of sp56 in rat tissues, Northern blot shows that a -2.0 kb mRNA expresses specifically in testis. Employed the RACE method, two full cDNA sequences of rat sp56 were obtained. A Mr -42 KD band was detected in denatured and non-reducing protein sample of rat testis and sperm with anti-mouse sp56 monoclonal antibody by Western blot method. Rat sp56 was localized on rat sperm head by the indirect immunofluorescence method. Rat sp56 immunoreactivi

关键词： ZP3 receptor sp56 rat testis sperm cloning.

反转录病毒载体介导RNA干扰抑制EphA2在Hela细胞中的蛋白表达

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中国组织工程研究与临床康复 2007年第37期11卷 7401-7404页

作者：吴丹李珊珊索振河上海交通大学医学院附属国际和平妇幼保健院上海市200030 郑州大学第一附属医院病理科河南省郑州市450052 威奥斯陆大学附属肿瘤医院癌症研究中心

目的:课题前期发现EphA2和配体EphrinAl在宫颈鳞癌细胞和肿瘤相关血管内皮细胞均呈高表达,为基因治疗宫颈癌提供了理想的靶向。以此为基础,利用反转录病毒载体介导的RNA干扰抑制EphA2在Hela宫颈癌细胞中的蛋白表达。方法:实验于2006-01... 详细信息

目的:课题前期发现EphA2和配体EphrinAl在宫颈鳞癌细胞和肿瘤相关血管内皮细胞均呈高表达,为基因治疗宫颈癌提供了理想的靶向。以此为基础,利用反转录病毒载体介导的RNA干扰抑制EphA2在Hela宫颈癌细胞中的蛋白表达。方法:实验于2006-01/06在河南省肿瘤病理重点实验室完成。①实验材料:PA317细胞、Hela229细胞购自上海生化细胞所,小鼠NIH3T3细胞为本室保存。EphA2兔抗人多克隆抗体,Actin兔抗人多克隆抗体(美国SantaCruz公司)。②实验方法:从EphA2的mRNA全序列中筛选出1个19nt的靶序列,设计双链发夹结构。以siRNA互补双链寡核苷酸,构建反转录病毒表达载体pSIREN-EphA2,提取质粒,用BglⅡ和EcoRⅠ双酶切进行鉴定。选择经酶切鉴定的正确克隆测序。挑选pSIREN-EphA2抗性克隆细胞扩增,检测转染后Hela细胞中EphA2蛋白的表达水平。结果:①pSIREN-EphA2重组质粒的酶切鉴定:双酶切后形成328bp和6182bp两条电泳条带。②pSIREN-EphA2重组质粒测序:结果与已知序列完全一致。③EphA2蛋白的表达:经Westernblot分析,重组pSIREN-EphA2转染的Hela细胞中EphA2蛋白表达水平明显降低。结论:通过反转录病毒载体介导的RNA干扰,能够抑制EphA2在Hela细胞中的蛋白表达,为以EphA2为靶点的宫颈癌基因治疗提供新的思路和手段。

关键词： EphA2 反转录病毒载体 RNA干扰

The Calculation of Dynamic Fracture Parameters of Metal Material under Impact Loading

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The Calculation of Dynamic Fracture Parameters of Metal Mate...

骨髓基质干细胞复合羟基磷灰石-磷酸三钙修复骨缺损过程中的微循环变化

2009年度海峡两岸工程力学研讨会

作者： Chen HY,Zeng XG~*,Wang QY,li JL,Xu ss College of Architecture and Environment.Sichuan University.Chengdu.P.R.China.610065

Dynamic fracture mechanics which doesn’t neglect the inertia effect of the subject investigated is widely used in analysis of effectiveness of engineering structure and equipment,*** the research of dynamic fracture is much more complicated than quasi-static fracture problem while considering inertia effect and stress wave effect,as a result of which,even the analytical result of stress intensity factor at the crack tip of such simple sample as three-point bending beam hasn’t been determined by *** satisfy the request of theoretic and experimental analysis,this paper describes a numerical method to compute dynamic fracture parameters of three-point bending sample impacted by Hopkinson Pressure Bar based on Virtual Crack Closure Technique(VCCT),in which the dispersion and inertia effect are accounted in the input *** the dynamic fracture experimental data in literature related, corresponding dynamic fracture toughness is gained through the method presented in this *** calculated results are in satisfactory agreement with the results in literature related.

关键词： Three-point bending sample Hopkinson pressure bar Dynamic stress intensity factor Finite element Virtual crack closure technique

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中国组织工程研究与临床康复 2007年第35期11卷 7050-7052页

作者：李慎松文益民李志琳张炼王东解放军兰州军区总医院脊柱外科甘肃省兰州市730050

目的:了解骨髓基质干细胞复合羟基磷灰石-磷酸三钙构建组织工程骨修复骨缺损过程中,实验动物血液流变学和骨缺损修复区血流量的变化。方法:实验于2006-05/2007-01在解放军兰州军区总医院脊柱外科实验室完成。①构建组织工程骨:取健康新... 详细信息

目的:了解骨髓基质干细胞复合羟基磷灰石-磷酸三钙构建组织工程骨修复骨缺损过程中,实验动物血液流变学和骨缺损修复区血流量的变化。方法:实验于2006-05/2007-01在解放军兰州军区总医院脊柱外科实验室完成。①构建组织工程骨:取健康新西兰白兔2只,双侧胫骨结节处穿刺抽取红骨髓8mL,分离培养并诱导骨髓基质干细胞;将复合羟基磷灰石-磷酸三钙支架材料以1×109L-1密度接种经诱导培养的骨髓基质干细胞。②实验方法:选择20只新西兰白兔,制作15mm长的桡骨节段性骨缺损模型,根据植入不同移植材料分为实验组和对照组各10只,实验组植入组织工程骨,对照组植入单纯羟基磷灰石-磷酸三钙。③实验评估:观察动物术后1h、7,14d血液流变学和术后14d骨缺损修复区血流量的变化。结果:20只兔均进入结果分析。①血液流变学结果:术后1h,2组各项指标比较无差异;术后7d,实验组全血黏度、血浆黏度和红细胞聚集指数低于对照组(P<0.05,0.01);术后14d,实验组全血黏度和红细胞聚集指数低于对照组(P<0.01)。②血流量比较:2组右侧桡骨正常皮质骨血流量无差异;实验组左侧骨缺损修复区皮质骨或骨痂血流量高于对照组(P<0.01)。结论:与单纯复合羟基磷灰石-磷酸三钙材料比较,骨髓基质干细胞复合羟基磷灰石-磷酸三钙的组织工程骨可改善骨缺损修复区的微循环。

关键词：羟基磷灰石磷酸三钙血液流变学血流量

Constraints on holographic QCD phase transitions from PTA observations

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 71-78页

作者： Song He li li Sai Wang Shao-Jiang Wang Center for Theoretical Physics and College of Physics Jilin University School of Physical Science and Technology Ningbo University Max Planck Institute for Gravitational Physics (Albert Einstein Institute) CAS Key Laboratory of Theoretical Physics Institute of Theoretical Physics Chinese Academy of Sciences School of Fundamental Physics and Mathematical Sciences Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of Sciences (UCAS) School of Physical Sciences University of Chinese Academy of Sciences (UCAS) Theoretical Physics Division Institute of High Energy Physics Chinese Academy of Sciences

The underlying physics of QCD phase transition in the early Universe remains largely unknown due to its strong-coupling nature during the quark-gluon plasma/hadron gas transition, yet a holographic model has been proposed to quantitatively fit the lattice QCD data while with its duration of the first-order phase transition(FoPT) left undetermined. At specific baryon chemical potential, the first-order QCD phase transition agrees with the observational constraint of baryon asymmetry. It, therefore, provides a scenario for phase transition gravitational waves(GWs) within the standard model of particle physics. If these background GWs could contribute dominantly to the recently claimed common-spectrum red noise from pulsar timing array(PTA) observations, the duration of this FoPT can be well constrained, and the associated primordial black holes are still allowed by current observations.

关键词： pulsar timing array QCD phase transition gravitational waves primordial black holes

Cell polarization in ischemic stroke: molecular mechanisms and advances

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Neural Regeneration Research 2025年第3期20卷 632-645页

作者： Yuanwei li Xiaoxiao Xu Xuan Wu Jiarui li Shiling Chen Danyang Chen Gaigai li Zhouping Tang Department of Neurology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei ProvinceChina

Ischemic stroke is a cerebrovascular disease associated with high mortality and disability rates. Since the inflammation and immune response play a central role in driving ischemic damage, it becomes essential to modulate excessive inflammatory reactions to promote cell survival and facilitate tissue repair around the injury site. Various cell types are involved in the inflammatory response, including microglia, astrocytes, and neutrophils, each exhibiting distinct phenotypic profiles upon stimulation. They display either proinflammatory or anti-inflammatory states, a phenomenon known as ‘cell polarization.’ There are two cell polarization therapy strategies. The first involves inducing cells into a neuroprotective phenotype in vitro, then reintroducing them autologously. The second approach utilizes small molecular substances to directly affect cells in vivo. In this review, we elucidate the polarization dynamics of the three reactive cell populations(microglia, astrocytes, and neutrophils) in the context of ischemic stroke, and provide a comprehensive summary of the molecular mechanisms involved in their phenotypic switching. By unraveling the complexity of cell polarization, we hope to offer insights for future research on neuroinflammation and novel therapeutic strategies for ischemic stroke.

关键词： astrocyte polarization immune regulation inflammation ischemic injury microglia polarization neutrophil polarization signaling pathways stroke

Design of a cationic accelerator enabling ultrafast ion diffusion kinetics in aqueous zinc-ion batteries

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Journal of Energy Chemistry 2025年第1期100卷 377-384页

作者： Yawei Xiao Qianqian Gu Haoyu li Mengyao li Yude Wang National Center for International Research on Photoelectric and Energy Materials School of Materials and Energy Yunnan University Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources School of Chemistry and Chemical Engineering Hainan University College of Chemical Engineering Fuzhou University Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies Yunnan University

Aqueous zinc-ion batteries are highly favored for grid-level energy storage owing to their low cost and high safety,but their practical application is limited by slow ion *** address this,a strategy has been developed to create a cation-accelerating electric field on the surface of the cathode to achieve ultrafast Zn2+diffusion *** employing electrodeposition to coat MoS2on the surface of BaV6O16·3H2O nanowires,the directional built-in electric field generated at the heterointerface acts as a cation accelerator,continuously accelerating Zn2+diffusion into the active *** optimized Zn2+diffusion coefficient in CC@BaV-6O16·3H2O@MoS2(7.5×10～8cm2s-1) surpasses that of most reported V-based ***,MoS2serving as a cathodic armor extends the cycling life of the Zn-CC@BaV6O16·3H2O@MoS2full batteries to over 10000 *** work provides valuable insights into optimizing ion diffusion kinetics for high-performance energy storage devices.

关键词： Internal electric field Cationic accelerator Ion diffusion kinetics Cathode modification strategy Aqueous zinc ion battery

Increase in the variability of terrestrial carbon uptake in response to enhanced future ENSO modulation

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 32-38页

作者： Younong li li Dan Jing Peng Qidong Yang Fuqiang Yang Key Laboratory of Regional Climate-Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region Department of Atmospheric ScienceYunnan UniversityKunmingChina

El Niño-Southern Oscillation(ENSO)is a major driver of climate change in middle and low latitudes and thus strongly influences the terrestrial carbon cycle through land-air *** the ENSO modulation and carbon flux variability are projected to increase in the future,but their connection still needs further *** investigate the impact of future ENSO modulation on carbon flux variability,this study used 10 CMIP6 earth system models to analyze ENSO modulation and carbon flux variability in middle and low latitudes,and their relationship,under different scenarios simulated by CMIP6 *** results show a high consistency in the simulations,with both ENSO modulation and carbon flux variability showing an increasing trend in the *** higher the emissions scenario,especially ssP5-8.5 compared to ssP2-4.5,the greater the increase in *** flux variability in the middle and low latitudes under ssP2-4.5 increases by 30.9%compared to historical levels during 1951-2000,while under ssP5-8.5 it increases by 58.2%.Further analysis suggests that ENSO influences mid-and low-latitude carbon flux variability primarily through *** occurrence may potentially be attributed to the increased responsiveness of gross primary productivity towards regional temperature fluctuations,combined with the intensified influence of ENSO on land surface temperatures.

关键词： Carbon variability ENSO modulation CMIP6 models

Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai li Zhen Ma Jin-Hua Gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity