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299篇 您的检索式:作者名="ZhiGang Zhao"
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1Suppression of tumorigenesis by human mesenchymal stem cells in a hepatoma model显示文摘人的间充质的干细胞(hMSCs ) 装家到肿瘤地点并且禁止肿瘤细胞的生长。很少对内在的分子的机制被知道连接 hMSCs 到肿瘤房间的指向的抑制。在这研究,我们从 hMSCs 用一个动物移植模型,一个合作文化系统和调节媒介在二根人的 hepatoma 房间线(H7402 和 HepG2 ) 上调查了 hMSCs 的效果。当 SCID 老鼠与 H7402 细胞和 Z3 hMSCs 的一个相等的数字被注射时,动物移植研究证明肿瘤形成的潜伏的时间被延长并且肿瘤尺寸更小。当 co 有教养时与 Z3 房间, H7402 细胞增殖减少了,增加的 apoptosis,和 Bcl-2 的表示, c-Myc,原子抗原(PCNA ) 和 survivin 低是的增殖的房间调整了。在有调节媒介的处理源于 Z3 hMSC 文化以后, H4702 房间出现了减少的形成殖民地的能力和减少的增长。Immunoblot 分析证明 beta-catenin, Bcl-2, c-Myc, PCNA 和 survivin 表示是在 H7402 和 HepG2 房间调整的 down。总起来说,我们的调查结果证明 hMSCs 禁止 H7402 和 HepG2 人的肝癌症房间线的恶意的显型,它包括增长,形成殖民地的能力和 oncogene 表示试管内和体内。而且,我们的研究提供表明小径的 Wnt 可以在调停 hMSC 的指向和肿瘤房间抑制有一个角色的证据。Ling Qiao Zhili Xu Tiejun Zhao Zhigang Zhao Mingxia Shi Robert C Zhao Lihong Ye Xiaodong Zhang 2008Cell Research2008,18,4:68
2Precise orbit determination of Beidou Satellites with precise positioning显示文摘Chinese Beidou satellite navigation system constellation currently consists of eight Beidou satellites and can provide preliminary service of navigation and positioning in the Asia-Pacific Region.Based on the self-developed software Position And Navigation Data Analysis(PANDA) and Beidou Experimental Tracking Stations (BETS),which are built by Wuhan University,the study of Beidou precise orbit determination,static precise point positioning (PPP),and high precision relative positioning,and differential positioning are carried out comprehensively.Results show that the radial precision of the Beidou satellite orbit determination is better than 10 centimeters.The RMS of static PPP can reach several centimeters to even millimeters for baseline relative positioning.The precision of kinematic pseudo-range differential positioning and RTK mode positioning are 2-4 m and 5-10 cm respectively,which are close to the level of GPS precise positioning.Research in this paper verifies that,with support of ground reference station network,Beidou satellite navigation system can provide precise positioning from several decimeters to meters in the wide area and several centimeters in the regional area.These promising results would be helpful for the implementation and applications of Beidou satellite navigation system.SHI Chuang ZHAO QiLe LI Min TANG WeiMing HU ZhiGang LOU YiDong ZHANG HongPing NIU XiaoJi LIU JingNan 2012Science China Earth Sciences2012,55,7:61
3Pathogenic T-cells and inflammatory monocytes incite inflammatory storms in severe COVID-19 patients显示文摘Pathogenic human coronavirus infections,such as severe acute respiratory syndrome CoV(SARS-CoV)and Middle East respiratory syndrome CoV(MERS-CoV),cause high morbidity and mortality[1,2].Recently,a severe pneumonia-associated respiratory syndrome caused by a new coronavirus(SARS-CoV-2)was reported in December 2019 in the city of Wuhan,Hubei province,China[3-5],which was also named as pneumonia-associated respiratory syndrome(PARS)[6]and can cause coronavirus disease 2019(COVID-19)to seriously endanger human health.Yonggang Zhou Binqing Fu Xiaohu Zheng Dongsheng Wang Changcheng Zhao Yingjie Qi Rui Sun Zhigang Tian Xiaoling Xu Haiming Wei 2020National Science Review2020,7,6:54
4Development of a Haploid-Inducer Mediated Genome Editing System for Accelerating Maize Breeding显示文摘Crop breeding aims to generate pure in bred lines with multiple desired traits. Doubled haploid (DH) and genome editing using CRISPR/Cas9 are two powerful game-changing technologies in crop breeding. However, both of them still fall short for rapid generation of pure elite lines with integrated favorable traits. Here, we report the development of a Haploid-Inducer Mediated Genome Editing (IMGE) approach, which utilizes a maize haploid inducer line carrying a CRISPR/Cas9 cassette targeting for a desired agronomic trait to pollinate an elite maize in bred line and to generate genome-edited haploids in the elite maize background. Homozygous pure DH lines with the desired trait improvement could be generated within two generations, thus bypassing the lengthy procedure of repeated crossing and backcrossing used in conventional breeding for integrating a desirable trait into elite commercial backgrounds.Baobao Wang Lei Zhu Binbin Zhao Yongping Zhao Yurong Xie Zhigang Zheng Yaoyao Li Juan Sun Haiyang Wang 2019Molecular Plant2019,12,4:32
5The Chrysanthemum nankingense Genome Provides Insights into the Evolution and Diversification of Chrysanthemum Flowers and Medicinal Traits显示文摘The Asteraceae (Compositae),a large plant family of approximately 24 000-35 000 species,accounts for^10% of all angiosperm species and contributes a lot to plant diversity.The most representative members of the Asteraceae are the economically important chrysanthemums (Chrysanthemum L.)that diversified through reticulate evolution.Biodiversity is typically created by multiple evolutionary mechanisms such as wholegenome duplication 0NGD)or polyploidization and locally repetitive genome expansion.However,the lack of genomic data from chrysanthemum species has prevented an in-depth analysis of the evolutionary mechanisms involved in their diversification.Here,we used Oxford Nanopore long-read technologyto sequence the diploid Chrysanthemum nankingense genome,which represents one of the progenitor genomes of domesticated chrysanthemums.Our analysis revealed that the evolution of the C.nankingense genome was driven by bursts of repetitive element expansion and WGD events including a recentWGD that distinguishes chrysanthemum from sunflower,which diverged from chrysanthemum approximately 38.8 million years ago.Variations of ornamental and medicinal traits in chrysanthemums are linked to the expansion of candidate gene families by duplication events including paralogous gene duplication.Collectively,our study of the assembled reference genome offers new knowledge and resources to dissect the history and pattern of evolution and diversification of chrysanthemum plants,and also to accelerate their breeding and improvement.Chi Song Yifei Liu Aiping Song Gangqiang Dong Hongbo Zhao Wei Sun Shyam Ramakrishnan Ying Wang Shuaibin Wang Tingzhao Li Yan Niu Jiafu Jiang Bin Dong Ye Xia Sumei Chen Zhigang Hu Fadi Chen Shilin Chen 2018Molecular Plant2018,11,12:24
6Temporospatial changes of carbon footprint based on energy consumption in China显示文摘地区性的碳排放上的学习是在全球气候变化和低碳的经济开发的背景下面的热话题之一,并且也帮助为不同区域建立不同低碳的策略。根据精力消费和在从 1999 ~ 2008 的中国的不同区域的陆地使用数据,这份报纸基于全部的精力消费建立了碳排放和碳脚印模型,并且从 1999 ~ 2008 在中国的不同区域计算了碳排出物和碳脚印的数量。作者也分析了碳排放密度并且每为每个区域统一区域碳脚印。最后,为减少的碳脚印的忠告被提出。主要结论如下:(1 ) 从全部的精力消费的碳排出物在中国从 1999 ~ 2008 增加了 129% ,但是它在不同区域之中的空间分发模式稍微就改变了排序排放数量是的碳:东方中国 > 北中国 > 中央、南部的中国 > 西南中国 > 西北中国。(2 ) 排序碳排放密度是:东方中国 > 东北中国 > 中央、南部的中国 > 北中国 > 西南中国 > 从 1999 ~ 2003,但是从 2004 中央、南部的中国的西北中国开始比东北中国有更高的碳排放密度,另外的区域的顺序没变化。(3 ) 自从从 1999 ~ 2008 的在中国的不同区域的碳排出物和生产土地的更少的增加的区域的快速的增加,碳脚印显著地增加了。北中国有最大的碳脚印,和西北中国,东方中国,北中国,中央、南部的中国接着列在后面,当西南中国介绍了碳脚印和碳吸收的最高的百分比的最低区域时。(4 ) 主要由地区性的陆地区域影响了,介绍的北中国每统一区域碳脚印最高、由东方中国,和东北中国跟随;中央、南部的中国,和西北中国每统一区域碳脚印有类似的媒介;总是有的西南中国每联合起来最低区域碳脚印。(5 ) 中国面对了碳排放带的大生态的压力。一些措施应该从减少碳排放和增加的碳吸收被花两个。CHUAI Xiaowei LAI Li HUANG Xianjin ZHAO Rongqin WANG Wanjing CHEN Zhigang 2012Journal of Geographical Sciences2012,22,1:23
7Clinical observation on effect of scalp electroacupuncture for mild cognitive impairment显示文摘OBJECTIVE: To evaluate the therapeutic effect of scalp electroacupuncture for mild cognitive impairment (MCI) in the early stage. METHODS: Two hundred and thirty three MCI patients were randomly divided into three groups: the drug group, the scalp electroacupuncture group, and the syndrome differentiation group. For the scalp electroacupuncture group, the points of Baihui (DU 20), Sishecong (EX-HN1), Fengchi (GB 20), and Shenting (DU 24) were selected. For the syndrome differentiation group, specific acupoints were added on the basis of syndrome differentiation and according to the scale for the differentiation of syndromes in vascular dementia (SDSVD) beside the acupoints used in the scalp electroacupuncture group. For the drug group, nimodipine was orally administered. Each patient was treated for two courses, eight weeks. The score differences in minimental state examination (MMSE), picture recognition, and clock drawing test were observed before and after the treatment. RESULTS: After treatment, the score differences in MMSE and clock drawing test were of obvious statistical significance among three groups (P<0.01, P<0.05). The score differences in picture recognition were of extremely statistical significance between the scalp electroacupuncture group and the syndrome differentiation group (P<0.01), while the difference was not found in the drug group (P>0.05). There were statistical significant differences in therapeutic effects between the scalp electroacupuncture group and the drug group, and between the syndrome differentiation group and the drug group (P<0.05), while no statistical difference was found between scalp electroacupuncture group and the syndrome differentiation group (P>0.05). CONCLUSION: All the three therapies may improve the cognitive function of MCI patients. The therapeutic effects in the scalp electroacupuncture and syndrome differentiation groups were basically the same, but superior to nimodipine.Hong Zhang Ling Zhao Sha Yang Zhigang Chen Yingkun Li Xiaohong Peng Yulong Yang Manjia Zhu 2013Journal of Traditional Chinese Medicine2013,33,1:23
8TRPV1 activation improves exercise endurance and energy metabolism through PGC-1α upregulation in mice显示文摘Zhidan Luo Liqun Ma Zhigang Zhao Hongbo He Dachun Yang Xiaoli Feng Shuangtao Ma Xiaoping Chen Tianqi Zhu Tingbing Cao Daoyan Liu Bernd Nilius Yu Huang Zhencheng Yan Zhiming Zhu 2012Cell Research2012,22,3:18
9Ti/(Ti,Cr)N/CrN multilayer coated 316L stainless steel by arc ion plating as bipolar plates for proton exchange membrane fuel cells显示文摘Arc ion plating(AIP) is applied to form Ti/(Ti,Cr)N/Cr N multilayer coating on the surface of 316 L stainless steel(SS316L) as bipolar plates for proton exchange membrane fuel cells(PEMFCs). The characterizations of the coating are analyzed by scanning electron microscopy(SEM) and X-ray diffraction(XRD). Interfacial contact resistance(ICR) between the coated sample and carbon paper is 4.9 m cm^2 under 150 N/cm^2,which is much lower than that of the SS316 L substrate. Potentiodynamic and potentiostatic tests are performed in the simulated PEMFC working conditions to investigate the corrosion behaviors of the coated sample. Superior anticorrosion performance is observed for the coated sample, whose corrosion current density is 0.12 μA/cm2. Surface morphology results after corrosion tests indicate that the substrate is well protected by the multilayer coating. Performances of the single cell with the multilayer coated SS316 L bipolar plate are improved significantly compared with that of the cell with the uncoated SS316 L bipolar plate, presenting a great potential for PEMFC application.Shengli Wang Ming Hou Qing Zhao Yongyi Jiang Zhen Wang Huizhe Li Yu Fu Zhigang Shao 2017Journal of Energy Chemistry2017,26,1:17
10Growth and nutrient dynamics of Betula alnoides seedlings under exponential fertilization显示文摘Betula alnoides is a fast-growing hardwood species grown in large plantations in Southeast Asia and South China.Nitrogen requirements for producing robus seedlings,growth and nutrient dynamics were investigated using exponential fertilization treatments.Root collar diameter,height,dry mass and nutrient contents of seedlings increased exponentially in all fertilization treatments as time progressed.Moreover,with water soluble fertilizer(Plant Products plus microelements N–P_2O_5–K_2O:20–20–20),300 mg N seedling^(-1)was adequate.Vector analysis revealed that P was the most responsive nutrient element followed by N and K.Dilutions of N and K were evident in the plants without N addition,which induced initial P sufficiency and then luxury consumption probably due to the antagonistic interaction between N and P.However deficiencies of N,P and K were mostly observed in al exponential regimes during the experiment because seedling growth rate exceeded nutrient uptake rate,inferring that further study on improving the nutrient uptake efficiency is needed.Analysis of relationships among nutrient supply,dry mass,N content and N concentration demonstrated that 100–400 mg N seedling^(-1)induced sufficiency to luxury consumption of nitrogen without significant change in dry mass,and 400 mg N seedling^(-1)is recommended to apply for nutrient loading of seedlings before outplanting.The findings will help improve seedling quality and enhance the production of robust seedlings for plantation forestry of this species.Lin Chen Chunsheng Wang Bernard Dell Zhigang Zhao Junjie Guo Daping Xu Jie Zeng 2018Journal of Forestry Research2018,29,1:14
11Transcriptional activation and phosphorylation of OsCNGC9 confer enhanced chilling tolerance in rice显示文摘Low temperature is a major environmental factor that limits plant growth and productivity.Although transient elevation of cytoplasmic calcium has long been recognized as a critical signal for plant cold tolerance,the calcium channels responsible for this process have remained largely elusive.Here we report that OsCNGC9,a cyclic nucleotide-gated channel,positively regulates chilling tolerance by mediating cytoplasmic calcium elevation in rice(Oryza sativa).We showed that the loss-of-function mutant of OsCNGC9 is defective in cold-induced calcium influx and more sensitive to prolonged cold treatment,whereas OsCNGC9 overexpression confers enhanced cold tolerance.Mechanistically,we demonstrated that in response to chilling stress,OsSAPK8,a homolog of Arabidopsis thaliana OST1,phosphorylates and activates OsCNGC9 to trigger Ca2+influx.Moreover,we found that the transcription of OsCNGC9 is activated by a rice dehydration-responsive element-binding transcription factor,OsDREB1A.Taken together,our results suggest that OsCNGC9 enhances chilling tolerance in rice through regulating cold-induced calcium influx and cytoplasmic calcium elevation.Jiachang Wang Yulong Ren Xi Liu Sheng Luo Xiao Zhang Xin Liu Qibing Lin Shanshan Zhu Hua Wan Yang Yang Yu Zhang Bin Lei Chunlei Zhou Tian Pan Yongfei Wang Mingming Wu Ruonan jing Yang Xu Meng Han Fuqing Wu Cailin Lei Xiuping Guo Zhijun Cheng Xiaoming Zheng Yihua Wang Zhigang Zhao Ling Jiang Xin Zhang Yong-Fei Wang Haiyang Wang Jianmin Wan 2021Molecular Plant2021,14,2:10
12Application of improved active disturbance rejection control algorithm in tilt quad rotor显示文摘The Tilt Quad Rotor(TQR) has complex dynamics characteristics, especially in conversion mode. It is difficult to build the dynamic model of the TQR and the environmental factors have a great influence on it. To solve the problem of control in conversion mode of TQR, this paper carries out the design of the controller based on improved Active Disturbance Rejection Control(ADRC). According to the characteristics of flight in conversion mode, Tracking Differentiator(TD) with explicit model is used to solve the problem of multiple integrals when the system is high-order system. Extended State Observer(ESO) with Radial Basis Function(RBF) neural network is used to estimate and compensate for internal and external uncertainties, and the adaptive sliding mode control in Nonlinear State Error Feedback(NLSEF) is used to improve the response speed of the controller and reduce the parameters which should be tuned. Through the flight control simulation of the TQR, the validity and rationality of the control system are verified.Zhigang WANG Hong ZHAO Dengyan DUAN Yuanyang JIAO Jianbo LI 2020Chinese Journal of Aeronautics2020,33,6:10
13Improved activity of Ni/MgAl_2O_4 for CO_2 methanation by the plasma decomposition显示文摘CO2 methanation has been a hot topic because of its important application in the spacecraft and potential utilization of carbon dioxide. Nickel catalyst is active for this reaction. However, its activity still needs to be improved. Dielectric barrier discharge(DBD) plasma, initiated at ambient condition and operated at ~150 °C,has been employed in this work for decomposition of nickel precursor to prepare Ni/Mg Al2O4. The plasma decomposition results in high dispersion, unique structure, enhanced reducibility of Ni particles and promoted catalyst-support interaction. An improved activity of CO2 methanation with a higher yield of methane has been achieved over the plasma decomposed catalyst, compared to the catalyst prepared thermally. For example, the methane yield of the plasma prepared catalyst is 71.8% at 300 °C but it is 62.9% over the thermal prepared catalyst. The catalyst characterization confirmed that CO2 methanation over the DBD plasma prepared catalyst follows pathway of CO methanation.Zhigang Fan Kaihang Sun Ning Rui Binran Zhao Chang-jun Liu 2015Journal of Energy Chemistry2015,24,5:9
14Safety and efficacy of tenecteplase versus alteplase in patients with acute ischaemic stroke (TRACE): a multicentre, randomised, open label, blinded-endpoint (PROBE) controlled phase II study显示文摘Background Tenecteplase(TNK)possesses several pharmacological characteristics superior to conventional alteplase(rt-PA),with well-established safety and efficacy profile in Caucasians.There exists controversy over the optimal dose of intravenous rt-PA for East Asians with acute ischaemic stroke(AIS).Current study aimed to determine the safety dose range of recombinant human TNK tissue-type plasminogen activator(rhTNK-tPA)for patients with AIS in China.Methods This multicentre,prospective,randomised,open-label,blinded end-point,phase II study compared three tiers of 0.1,0.25,0.32 mg/kg rhTNK-tPA(to a maximum of 40 mg)with standard 0.9 mg/kg rt-PA(to a maximum of 90 mg)in patients who were eligible for intravenous thrombolysis.The safety outcome were symptomatic intracranial haemorrhage(sICH)within 36 hours.Results Between May 2018 and February 2020,240 patients were randomly assigned to four group,4 of whom did not receive study treatment.The intention-to-treat analysis included 236 patients.There was no difference in the improvement on National Institutes of Health Stroke Scale at day 14 in the 3 tiers and control group(63.3%,77.2%,66.7%vs 62.7%).The number of sICH was 3 of 60(5.0%)in the 0.1 mg/kg group,none in the 0.25 mg/kg group,2 of 60(3.3%)in the 0.32 mg/kg group and 1(1.7%)of 59 in the rt-PA group.There were no significant between-group differences in severe adverse events.Conclusions Similar to the Caucasians,rhTNK-tPA was well tolerated in Chinese patients with AIS at all doses administered within 3 hours of symptom onset.The dose-efficacy profile of rhTNK-tPA needs to be established with future investigations.Shuya Li Yuesong Pan Ziran Wang Zhigang Liang Huisheng Chen Dong Wang Yi Sui Xingquan Zhao Yilong Wang WanLiang Du Huaguang Zheng Yongjun Wang 2022Stroke & Vascular Neurology2022,7,1:9
15Fate of secondary effluent dissolved organic matter during soil-aquifer treatment显示文摘The reduction of mass and trihalomethane formation potential (THMFP) of dissolved organic matter (DOM) and its fractions from secondary effluent during laboratory-scale soil-aquifer treatment (SAT) soil columns were studied. Reduction in dissolved organic carbon (DOC), absorbance of ultraviolet light at 254 nm (UV-254), biodegradable dissolved organic carbon (BDOC) and nonbiodegradable dis- solved organic carbon (NBDOC) for the bulk DOM averaged 72.35%, 53.98%, 97.49% and 35.33% across the soil columns, respectively. Using XAD-8 and XAD-4 resins, DOM was fractionated into 3 fractions: hydrophobic acid (HPO-A), transphilic acid (TPI-A) and hydrophilic fraction (HPI). HPO-A was removed by 61.06%, TPI-A by 54.86% and HPI by 74.95% as DOC as a consequence of the laboratory-scale SAT, respectively. The reduction of THMFP from HPO-A, TPI-A and HPI was 27.24%, 26.24% and 36.08%, respectively. Proton nuclear magnetic resonance (1H-NMR) spectra revealed that the HPO-A isolated from the secondary effluent contained more aromatic functional groups than the corresponding TPI-A. Fourier-transform infrared (FT-IR) spectrum analysis illustrated that TPI-A had decreased hydrocarbon and increased aromatics content in the SAT columns. Specific ultraviolet light absorbance (SUVA) and specific THMFP for each DOM fraction increased across the soil columns and HPI exhibited greater increase in both than HPO-A and TPI-A. The most problematic THM precursor was found to be HPO-A with its high quantity present in recharged water and high chlorine reactivity.XUE Shuang ZHAO QingLiang WEI LiangLiang WANG LiNa LIU ZhiGang 2007Chinese Science Bulletin2007,52,18:8
16Receptome profiling identifies KREMEN1 and ASGR1 as alternative functional receptors of SARS-CoV-2显示文摘Host cellular receptors play key roles in the determination of virus tropism and pathogenesis.However,little is known about SARS-CoV-2 host receptors with the exception of ACE2.Furthermore,ACE2 alone cannot explain the multi-organ tropism of SARS-CoV-2 nor the clinical differences between SARS-CoV-2 and SARS-CoV,suggesting the involvement of other receptor(s).Here,we performed genomic receptor profiling to screen 5054 human membrane proteins individually for interaction with the SARS-CoV-2 capsid spike(S)protein.Twelve proteins,including ACE2,ASGR1,and KREMEN1,were identified with diverse S-binding affinities and patterns.ASGR1 or KREMEN1 is sufficient for the entry of SARS-CoV-2 but not SARS-CoV in vitro and in vivo.SARS-CoV-2 utilizes distinct ACE2/ASGR1/KREMEN1(ASK)receptor combinations to enter different cell types,and the expression of ASK together displays a markedly stronger correlation with virus susceptibility than that of any individual receptor at both the cell and tissue levels.The cocktail of ASK-related neutralizing antibodies provides the most substantial blockage of SARS-CoV-2 infection in human lung organoids when compared to individual antibodies.Our study revealed an interacting host receptome of SARS-CoV-2,and identified ASGR1 and KREMEN1 as alternative functional receptors that play essential roles in ACE2-independent virus entry,providing insight into SARS-CoV-2 tropism and pathogenesis,as well as a community resource and potential therapeutic strategies for further COVID-19 investigations.Yunqing Gu Jun Cao Xinyu Zhang Hai Gao Yuyan Wang Jia Wang Juan He Xiaoyi Jiang Jinlan Zhang Guanghui Shen Jie Yang Xichen Zheng Gaowei Hu Yuanfei Zhu Shujuan Du Yunkai Zhu Rong Zhang Jianqing Xu Fei Lan Di Qu Guoliang Xu Yun Zhao Dong Gao Youhua Xie Min Luo Zhigang Lu 2022Cell Research2022,32,1:8
17Enhancing the strain hardening and ductility of Mg-Y alloy by introducing stacking faults显示文摘Due to the insufficient slip systems,Mg and its alloys exhibit poor ductility during plastic deformation at room temperature.To solve this problem,alloying is considered as a most effective method to improve the ductility of Mg alloys,which attracts wide attentions of industries.However,it is still a challenge to understand the ductilization mechanism,because of the complicated alloying elements and their interactions with Mg matrix.In this work,pure Mg and Mg-Y alloys were comparatively studied to investigate the effect of Y addition on microstructure evolution and mechanical properties.A huge increase of uniform elongation,from 5.3%to 20.7%,was achieved via only 3 wt%addition of yttrium.TEM results revealed that the only activated slip system in pure Mg was basalslip,led to its poor ductility at room temperature.In contrast,a large number of stacking faults and non-basal dislocations withcomponent were observed in the deformed Mg-Y alloy,which was proposed as the main reason for significant improvement of strain hardening and ductility.High resolution TEM indicated that most of the stacking faults were II and 12 intrinsic faults,which played a critical role in improving the ductility of Mg-Y alloy.Addition of Y into Mg alloy decreased the stacking fault energy,which induced high density stacking faults in the grain interior.Kang Wei Lirong Xiao Bo Gao Lei Li Yi Liu Zhigang Ding Wei Liu Hao Zhou Yonghao Zhao 2020Journal of Magnesium and Alloys2020,8,4:8
18MicroRNA396-mediated alteration in plant development and salinity stress response in creeping bentgrass显示文摘The conserved microRNA396(miR396)is involved in plant growth,development,and abiotic stress response in multiple plant species through regulating its targets,Growth Regulating Factor(GRF)transcription factor genes.However,the role of miR396 has not yet been characterized in perennial monocot species.In addition,the molecular mechanism of miR396-mediated abiotic stress response remains unclear.To elucidate the role of miR396 in perennial monocot species,we generated transgenic creeping bentgrass(Agrostis stolonifera)overexpressing Osa-miR396c,a rice miRNA396 gene.Transgenic plants exhibited altered development,including less shoot and root biomass,shorter internodes,smaller leaf area,fewer leaf veins,and epidermis cells per unit area than those of WT controls.In addition,transgenics showed enhanced salt tolerance associated with improved water retention,increased chlorophyll content,cell membrane integrity,and Na^(+)exclusion during high salinity exposure.Four potential targets of miR396 were identified in creeping bentgrass and up-regulated in response to salt stress.RNA-seq analysis indicates that miR396-mediated salt stress tolerance requires the coordination of stress-related functional proteins(antioxidant enzymes and Na+/H+antiporter)and regulatory proteins(transcription factors and protein kinases).This study establishes a miR396-associated molecular pathway to connect the upstream regulatory and downstream functional elements,and provides insight into the miRNA-mediated regulatory networks.Shuangrong Yuan Junming Zhao Zhigang Li Qian Hu Ning Yuan Man Zhou Xiaoxia Xia Rooksie Noorai Christopher Saski Shigui Li Hong Luo 2019Horticulture Research2019,6,1:8
19FHY3 and FAR1 Integrate Light Signals with the miR156-SPL Module-Mediated Aging Pathway to Regulate Arabidopsis Flowering显示文摘In response to competition for light from their neighbors,shade-intolerant plants flower precociously to ensure reproductive success and survival.However,the molecular mechanisms underlying this key developmental switch are not well understood.Here,we show that a pair of Arabidopsis transcription factors essential for phytochrome A signaling,FAR-RED ELONGATED HYPOCOTYL3(FHY3)and FAR-RED IMPAIRED RESPONSE1(FAR1),regulate flowering time by integrating environmental light signals with the miR156-SPL module-mediated aging pathway.We found that FHY3 and FAR1 directly interact with three flowering-promoting SQUAMOSA-PROMOTER BINDING PROTEIN-LIKE(SPL)transcription factors,SPL3,SPL4,and SPL5,and inhibit their binding to the promoters of several key flowering regulatory genes,including FRUITFUL(FUL),LEAFY(LFY),APETALA1(AP1),and MIR172C,thus downregulating their transcript levels and delaying flowering.Under simulated shade conditions,levels of SPL3/4/5 proteins increase,whereas levels of FHY3 and FAR1 proteins decline,thus releasing SPL3/4/5 from FHY3/FAR1 inhibition to allow activation of FUL,LFY,AP1,and MIR172C and,consequently,early flowering.Taken together,these results unravel a novel mechanism whereby plants regulate flowering time by integrating environmental cues(such as light conditions)and an internal developmental program(the miR156-SPL module-mediated aging pathway).Yurong Xie Qin Zhou Yongping Zhao Quanquan Li Yang Liu Mengdi Ma Baobao Wang Rongxin Shen Zhigang Zheng Haiyang Wang 2020Molecular Plant2020,13,3:8
20小鼠骨骼肌挫伤后基因表达的时间进程(英文)显示文摘Background:Though the mechanisms of skeletal muscle regeneration are deeply understood,those involved in muscle contusion,one of the most common muscle injuries in sports medicine clinics,are not.The objective of this study is to explore the mechanisms involved in muscle regeneration after contusion injury.Methods:In this study,a total of 72 mice were used.Eight of them were randomly chosen for the control group,while the rest were subjected to muscle contusion.Subsequently,their gastrocnemius muscles were harvested at different time points.The changes in muscle morphology were assessed by hematoxylin and eosin(HE) stain.In addition,the gene expression was analyzed by real-time polymerase chain reaction.Results:The data showed that the expression of many genes,i.e.,specific markers of immune cells and satellite cells,regulatory factors for muscle regeneration,cytokines,and chemokines,increased in the early stages of recovery,especially in the first 3 days.Furthermore,there were strict rules in the expression of these genes.However,almost all the genes returned to normal at 14 days post-injury.Conclusion:The sequence of immune cells invaded after muscle contusion was neutrophils,M1 macrophages and M2 macrophages.Some CC(CCL2,CCL3,and CCL4) and CXC(CXCL10) chemokines may be involved in the chemotaxis of these immune cells.HGF may be the primary factor to activate the satellite cells after muscle contusion.Moreover,2 weeks are needed to recover when acute contusion happens as used in this study.Weihua Xiao Yu Liu Beibei Luo Linlin Zhao Xiaoguang Liu Zhigang Zeng Peijie Chen 2016Journal of Sport and Health Science2016,5,1:8
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