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Regulation of m^(6)Am RNA modification and its implications in human diseases

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Journal of Molecular Cell Biology 2024年第3期16卷 1-8页

作者： Hao Jin zhouyuanjing Shi Tianhua zhou Shanshan Xie Children’s Hospital Zhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Department of Cell Biology Zhejiang University School of MedicineHangzhou 310058China Department of Gastroenterology The Second Affiliated HospitalZhejiang University School of MedicineHangzhou 310020China Center for Medical Research and Innovation in Digestive System Tumors Ministry of EducationHangzhou 310020China

N6,2′-O-dimethyladenosine(m^(6)Am)is a prevalent modification frequently found at the 5′cap-adjacent adenosine of messenger RNAs(mRNAs)and small nuclear RNAs(snRNAs)and the internal adenosine of *** dynamic and reversible modification is under the regulation of methyltransferases phosphorylated CTD interacting factor 1.and methyltransferase-like protein 4,along with the demethylase fat mass and obesity-associated protein.m^(6)Am RNA modification plays a crucial role in the regulation of pre-mRNA splicing,mRNA stability,and translation,thereby influencing gene *** recent years,there has been growing interest in exploring the functions of m^(6)Am and its relevance to human *** this review,we provide a comprehensive overview of the current knowledge concerning m^(6)Am,with a focus on m^(6)Am-modifying enzymes,sequencing approaches for its detection,and its impacts on pre-mRNA splicing,mRNA stability,and translation ***,we highlight the roles of m^(6)Am in the context of obesity,viral infections,and cancers,unravelling its underlying regulatory mechanisms.

关键词： m^(6)Am RNA modification gene regulation obesity viral infection cancer

慢性阻塞性肺疾病患者气胸发生风险的多因素预测模型构建和评价

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中国基层医药 2024年第2期31卷 208-212页

作者：周文邵灿谭洁温州市中西医结合医院急诊科温州325000

目的分析慢性阻塞性肺疾病(COPD)患者气胸发生的独立危险因素,构建并验证COPD患者气胸风险预测模型。方法采用便利抽样法,选取201.年1.至2021.1.月温州市中西医结合医院呼吸内科治疗的COPD患者500例进行病例对照研究,以胸部CT或X线胸... 详细信息

目的分析慢性阻塞性肺疾病(COPD)患者气胸发生的独立危险因素,构建并验证COPD患者气胸风险预测模型。方法采用便利抽样法,选取201.年1.至2021.1.月温州市中西医结合医院呼吸内科治疗的COPD患者500例进行病例对照研究,以胸部CT或X线胸片为诊断标准,根据是否发生气胸分为气胸组和对照组,以患者是否发生气胸为因变量,纳入的预测危险因素为自变量,将纳入的危险因素数据进行单因素logistic回归分析和多因素logistic回归分析,筛选出COPD患者发生气胸的独立影响因素,构建气胸风险预测模型并进行评价。用决策曲线分析法评估模型的临床实用性。结果500例COPD患者共计1.4例患者发生气胸,发生率为20.80%。二分类logistic回归分析结果显示,COPD病程长、C反应蛋白、机械通气是COPD患者气胸发生的独立危险因素;1.钟用力呼气容积占预计值的百分比(FEV_(1.%)、FEV_(1./用力肺活量(FVC)比值、血清白蛋白(ALB)是COPD患者气胸发生的保护因素。构建气胸风险预测模型,最终得到公式:Logit(P)=1..427+2.241.COPD病程+0.899×吸烟+7.71.×C反应蛋白+0.208×机械通气史-0.51.×ALB-0.243×FEV_(1.%-0.286FEV_(1./FVC。受试者工作特征曲线分析显示,曲线下面积(AUC)是0.81.,C-Index是0.781.95%CI:0.856~0.891.,表明构建的COPD患者气胸风险预测模型能较好地区分气胸患者与非气胸患者。结论C反应蛋白、ALB、FEV_(1.%、FEV_(1./FVC、吸烟、机械通气史是COPD患者气胸发生风险影响因素。据此成功构建COPD患者气胸发生的风险预测模型,模型具有良好的预测效果,可为医护人员采取预防性治疗和护理措施提供参考依据。

关键词：肺疾病,慢性阻塞性气胸预测呼吸功能试验 C反应蛋白质尿素人体质量指数

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Engineering singlet and triplet excitons of TADF emitters by different host-guest interactions

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Aggregate 2024年第1期5卷 337-344页

作者： Wei Zhang Jie Kong Rui Zhi An Jiachen Zhang Yujie zhou Lin-Song Cui Meng zhou Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefeiChina Key Laboratory of Precision and Intelligent Chemistry University of Science and Technology of China(USTC)HefeiChina CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefeiChina

Understanding the host-guest interactions for thermally activated delayed fluorescence(TADF)emitters is critical because the interactions between the host matrices and TADF emitters enable precise control on the optoelectronic performance,whereas technologically manipulating the singlet and triplet excitons by using different kinds of host-guest interactions remains ***,we report a comprehensive picture that rationalizes host-guest interaction-modulated exciton recombination by using time-resolved *** found that the early-time relaxation is accelerated in polar polymer because dipole-dipole interaction facilitates the stabilization of the 1.T ***,an opposite trend is observed in longer delay time,and faster decay in the less polar polymer is ascribed to theπ-πinteraction that plays the dominant role in the later stage of the excited *** findings highlight the technological engineering singlet and triplet excitons using different kinds of host-guest interactions based on their electronic characteristics.

关键词： host-guest interaction singlet TADF triplet

Leader-follower Optimal Selection Method for Distributed Control System in Active Distribution Networks

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CSEE Journal of Power and Energy Systems 2024年第1期10卷 314-323页

作者： Jian Le Liangang Zhao Cao Wang Qian zhou Yang Wang School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China

Aiming at the shortcomings of a traditional centralized control in an active distribution network(AND),this paper proposes a leader-follower distributed group cooperative control strategy to realize multiple operation and control tasks for an *** distributed information exchange protocols of the distributed generation(DG)group devoted to node voltage regulation or exchange power control are developed using a DG power utilization ratio as the consensus *** these bases,this study further investigates the leader optimal selection method for a DG group to improve the response speed of the distributed control ***,a single or multiple leader selection model is established to minimize the constraints of the one-step convergence factor and the number of leaders to improve the response speed of the distributed control *** simulation results of the IEEE 33 bus standard test system show the effectiveness of the proposed distributed control *** addition,the response speed of a DG control group can be improved effectively when the single or multiple leaders are selected optimally.

关键词： Active distribution1.etwork consensus algorithm leader-follower system mixed-integer semidefinite programming optimal distributed control

Water and other volatiles on Mars

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National Science Review 2024年第06期11卷 12-14页

作者： Sen Hu Yubing Gao Zhan zhou Liang Gao Yangting Lin Key Laboratory of the Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences

Mars, the intriguing red planet, is one of the planets most similar to the Earth in our solar system. It is widely accepted that Mars could have had a warm and wet climate in its early history supported by numerous lines of evidence, e.g. topography, canyons, outflow channels, presence of phyllosilicates and evaporative salts,sedimentary formation, and many others (e.g.[1.), and thus Mars is believed to once have a potentially habitable environment which could be able to supply fundamental conditions for the evolution of potential lives.

关键词： ISOTOPIC COMPOSITION MARTIAN ATMOSPHERE SUBSURFACE WATER ABUNDANCE TISSINT H2O CO2

New Antibacterial Dihydropyrones Induced by Co-Culture of Penicillium crustosum PRB-2 and Penicillium citrinum HDN1.-1.6

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Journal of Ocean University of China 2024年第1期23卷 216-220页

作者： YU Guihong zhou Luning WU Guangwei LI Dehai Shandong Province Key Laboratory of Applied Mycology and Qingdao International Center on Microbes Utilizing BiogasSchool of Life SciencesQingdao Agricultural UniversityQingdao 266109China School of Medicine and Pharmacy and Sanya Oceanographic InstitutionOcean University of ChinaQingdao 266003China College of Chemical Engineering Nanjing Forestry UniversityNanjing 210037China Laboratory for Marine Drugs and Bioproducts Laoshan LaboratoryQingdao 266237China

Two new dihydropyrones,rhytismatones C(1.and D(2),and a known compound,penicillenol A1.3),were isolated from the co-culture broth of the deep-sea-derived fungus Penicillium crustosum PRB-2 and Suaeda salsa-derived endophytic fungus Peni-cillium citrinum *** structures were elucidated through comprehensive analysis of nuclear magnetic resonance(NMR)spectra and mass *** absolute configurations of new compounds were determined by calculating the electronic circular di-chroism(ECD)***-MS data showed that compounds 1.3 could only be detected in the media of co-culture,suggesting new biosynthetic pathways were activated in the co-cultured *** 1.showed obvious antibacterial activities against Pro-teus ***-1.02 and Bacillus subtilis MMBC-1.04 with minimum inhibitory concentration(MIC)both at 25μmolL^(-1..

关键词： co-culture Penicillium crustosum Penicillium citrinum dihydropyrones antibacterial activity

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The growth ofβphase in Mg-Gd-Y-Ni alloy by experimental and first-principles study

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Journal of Magnesium and Alloys 2024年第2期12卷 506-515页

作者： Yiqiang Hao Lei zhou Zhiqing Chen Zhixian Zhao Bin Chen School of Materials Science and Engineering Shanghai Jiao Tong University800 Dongchuan RoadShanghai200240China

The paper reports on the atomic investigation aboutβphase in Mg_(96)Gd_(2)Y_(1.Ni_(1. alloy by using the first-principles study and the high-angle annular dark-field scanning transmission electron microscope(HAADF-STEM)corrected by atomic *** using HAADF-STEM,the rectangularβphases were observed in the underage and peak aging stages in Mg_(96)Gd_(2)Y_(1.Ni_(1. ***βphase could be precipitated from the previously precipitatedβphase,and theβphase grew in steps when it was precipitated.A special transition structure of three atomic layer thicknesses was first observed at the edge of theβphase and the structure of this interface is probably as theβ/Mg_(1. interface for the analysis of thermodynamic characterization and electronic ***β'phase and theβ_(H) structure were precipitated only at the edge of the length directions of theβ***β'phase continues to grow into aβphase directly without the formation ofβ_(1. phase,resulting in an increase in the length of theβphase,which is discovered for the first time.

关键词： HAADF-STEM First-principles study Mg-Gd-Y-Ni alloy βphase Growth Interface

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Inhibiting MMP1. Attenuates Deep Vein Thrombosis in a Mouse Model by Reducing the Expression of Pdpn

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Current Medical Science 2024年第2期44卷 369-379页

作者： Ji LUO Jin zhou Jing-zeng LUO Hai-long WANG Xue-ling ZHAO Ru-dan zhou Department of Intensive Care Unit The First People's Hospital of ZiyangZiyang 641300China Department of Orthopedics Kunming Medical University Second Affiliated HospitalKunming 650033China Department of Orthopedics Kunming Medical University First Affiliated HospitalKunming 650032China Department of Orthopedics The Third People's Hospital of Yunnan ProvinceKunming 650200China

Objective:Matrix metalloproteinase 1.(MMP1.)is an extracellular matrix protease that affects the progression of atherosclerotic plaques and arterial thrombi by degrading collagens,modifying protein structures and regulating inflammatory responses,but its role in deep vein thrombosis(DVT)has not been *** purpose of this study was to investigate the potential effects of MMP1. and MMP1.-related genes on the formation of ***:We altered the expression level of MMP1. in vivo and conducted a transcriptome study to examine the expression and relationship between MMP1. and MMP1.-related genes in a mouse model of *** screening genes possibly related to MMP1. in DVT mice,the expression levels of candidate genes in human umbilical vein endothelial cells(HUVECs)and the venous wall were *** effect of MMP1. on platelet aggregation in HUVECs was investigated in ***:Among the differentially expressed genes,interleukin 1.beta,podoplanin(Pdpn),and factor VIII von Willebrand factor(F8VWF)were selected for analysis in *** MMP1. was inhibited,the expression level of PDPN decreased significantly in *** HUVECs,overexpression of MMP1. led to an increase in the expression level of PDPN and induced platelet aggregation,while transfection of PDPN-siRNA weakened the ability of MMP1. to increase platelet ***:Inhibiting the expression of MMP1. could reduce the burden of DVT in *** mechanism involves downregulating the expression of Pdpn through MMP1.,which could provide a novel gene target for DVT diagnosis and treatment.

关键词： deep vein thrombosis matrix metalloproteinase 1. podoplanin

Effects of hot deformation and in-situ ZrB2 particle on microstructure and tensile performance of AA7085 composite sheets

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Journal of Iron and Steel Research International 2024年第7期31卷 1778-1791页

作者： Jiang-jing Wu Xi-zhou Kai Chuang Guan Yu-tao Zhao School of Material Science and Engineering Jiangsu UniversityZhenjiang 212013JiangsuChina

To provide a new idea to reduce anisotropy for sheets in the thickness direction by microstructure modification and,mean-while,maintain or even enhance tensile performance,the in-situ ZrB2 particle/AA7085 composite sheets with thicknesses of 1.2,3,and 6 mm were *** as-cast grain size was significantly refined by the heterogeneous nucleus of the ZrB2 *** microstructure results show that severe hot deformation converts as-cast disordered microstructure into a sequential microstructure by crushing the remanent phases and matrix into a fiber *** the solid solution and aging heat treatment,the composite sheets exhibit largely recrystallized grains compared with partially recrystallized grains in the matrix sheets,and weak or even free texture exists in the *** grain size in the composite sheets decreases with the increase in thickness *** the thickness range of 1.3 mm,the composite sheets maintain a similar tensile per-formance as that in matrix sheets,while the strength and ductility in the 6-mm-thick composite sheet are improved.

关键词： Composite sheet Grain structure Texture Dislocation Strengthening