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Dabigatran-induced esophageal injury:a case report

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Chinese Medical Journal 2020年第23期133卷 2897-2898页

作者： Jing-Rui Zhang chang-yi li Song-Nan li Jian-Zeng Dong chang-Sheng Ma Department of Cardiology Beijing Anzhen HospitalCapital Medical UniversityBeijing 100029China

To the Editor:Atrial fibrillation(AF)is one of the leading risk factors for stroke and is associated with a fivefold increase in the incidence of *** years,warfarin has been prescribed to lower the thrombotic risk in patients with ***,because of the finicky nature of warfarin(ie,unpredictable pharmacokinetics,frequent international normalized ratio testing,complex food-drug interactions,etc.),it has been incrementally replaced by multiple direct oral anticoagulants(DOACs).Dabigatran,a potent,competitive,and reversible DOAC that directly targets thrombin,was approved by the US Food and Drug Administration in 2010 as an alternative antithrombotic option for nonvalvular *** the randomized evaluation of long-term anticoagulation therapy(RE-LY)trial(a noninferiority trial comparing warfarin with dabigatran in patients with AF)showed that dabigatran is as successful as warfarin for preventing stroke or systemic embolism,its adverse effects also need attention.[1]Accumulating case reports have attracted attention to the issue of dabigatran-induced esophagitis(DIE).[2,3]Recent studies have found that elderly patients are more likely to develop DIE.[4]However,herein,we present a case of a younger male who developed DIE after taking dabigatran.

关键词： esophageal younger prescribed

The protective effects of α-ketoacids against oxidative stress on rat spermatozoa in vitro

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Asian Journal of Andrology 2010年第2期12卷 247-256页

作者： Shi-Feng li Hai-Xiong liu Yun-Bin Zhang Yuan-chang Yan yi-Ping li Laboratory of Molecular Cell Biology Shanghai Key Laboratory for Molecular Andrology Institute of Biochemistry andCell Biology Shanghai Institutes for Biological Sciences Chinese Academy of Sciences Shanghai 200031 China

The aim of this study was to determine the effects of antioxidants,including α-ketoacids （α-ketoglutarate and pyruvate）,lactate and glutamate/malate combination,against oxidative stress on rat spermatozoa. Our results showed that H2O2 （250 μmol L^-1）-induced damages,such as impaired motility,adenosine triphosphate （ATP） depletion,inhibition of sperm protein phosphorylation,reduced acrosome reaction and decreased viability,could be significantly prevented by incubation of the spermatozoa with α-ketoglutarate （4 mmol L^-1） or pyruvate （4 mmol L^-1）. Without exogenous H2O2 in the medium,the addition of pyruvate （4 mmol L^-1） significantly increased the superoxide anion （O2^-·） level in sperm suspension （P≤0.01）,whereas the addition of α-ketoglutarate （4 mmol L^-1） and lactate （4 mmol L^-1） significantly enhanced tyrosine-phosphorylated proteins with the size of 95 kDa （P≤0.04）. At the same time,α-ketoglutarate,pyruvate,lactate,glutamate and malate supplemented in media can be used as important energy sources and supply ATP for sperm motility. In conclusion,the present results show that α-ketoacids could be effective antioxidants for protecting rat spermatozoa from H2O2 attack and could be effective components to improve the antioxidant capacity ofBiggers,Whitten and Whittingham media.

关键词： α-ketoacids antioxidants oxidative stress reactive oxygen species

Reposition of coronary sinus lead dislocation only using pre-shaped stylet and guidewire： a case report

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Chinese Medical Journal 2011年第6期124卷 954-955页

作者： yi Fu SHEN Min WU Feng WANG Hai-chang GUO Wen-yi li Wei-jie liU Bing Department of Cardiovascular Medicine Xijing Hospital Fourth Military Medical University Xi'an Shaanxi 710032 China

Technologies associated with cardiac resynchronization therapy （CRT） devices and lead systems have ***, dislocation after coronary sinus （CS） lead placement continues to be a problem. We reported on the patient treated with CRT, in whom dislocation of CS lead occurred. In the case, we tried to reposition the CS lead without the left heart delivery system only using pre-shaped stylet and guidewire, and the dislocated CS lead could be successfully repositioned by the method. The method of only using a pre-shaped stylet and guidewire is easier than the conventional way, and it can shorten procedure duration and fluoroscopy time, as well as reduce the cost of treatment, but it is not always feasible.

关键词： cardiac resynchronization therapy coronary sinus lead dislocation reposition

Mathematical Model,Numerical Simulation and Convergence Analysis of a Semiconductor Device Problem with Heat and Magnetic Influences

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Acta Mathematicae Applicatae Sinica 2024年第2期40卷 302-319页

作者： chang-feng li yi-rang YUAN Huai-ling SONG School of Economics Shandong UniversityJinan 250100China Institute of Mathematics Shandong UniversityJinan 250100China College of Mathematics and Econometrics Hunan UniversityChangsha 410082China

In this paper,the authors discuss a three-dimensional problem of the semiconductor device type involved its mathematical description,numerical simulation and theoretical *** important factors,heat and magnetic influences are *** mathematical model is formulated by four nonlinear partial differential equations(PDEs),determining four major physical *** influences of magnetic fields are supposed to be weak,and the strength is parallel to the *** elliptic equation is treated by a block-centered method,and the law of conservation is *** computational accuracy is improved one *** equations are convection-dominated,thus are approximated by upwind block-centered *** difference can eliminate numerical dispersion and nonphysical *** diffusion is approximated by the block-centered difference,while the convection term is treated by upwind ***,the unknowns and adjoint functions are computed at the same *** characters play important roles in numerical computations of conductor device *** the theories of priori analysis such as energy estimates,the principle of duality and mathematical inductions,an optimal estimates result is *** a composite numerical method is shown for solving this problem.

关键词： three-dimensional conductor device problem with heat and magnetic influences upwind blockcentered differences elemental conservation of mass numerical analysis

Enhancement of low-temperature toughness of Fe-Mn-C-Al alloy by rare earth Ce-modified inclusions

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Journal of Iron and Steel Research International 2024年第1期31卷 157-173页

作者： Guang-kai Yang chang-ling Zhuang yi-zhuang li Chen Hu Shao-bo li College of Materials and Metallurgy Guizhou UniversityGuiyang550025GuizhouChina Department of Mechanical Engineering University of Hong KongHong Kong999077China The State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina State Key Laboratory of Public Big Data Guizhou UniversityGuiyang550025GuizhouChina

Fe-Mn-C-Al alloys have been recognized as promising materials for certain low-temperature applications due to their exceptional mechanical properties and ***,their limited low-temperature toughness restricts their large-scale applications in specific *** influence of trace amounts of rare earth cerium(Ce)on the low-temperature toughness of Fe-18Mn-0.6C-1.8Al alloys was *** addition of Ce effectively alters the inclu-sions in the alloy,transforming large-sized irregular inclusions into fine ellipsoidal rare earth *** leads to a significant reduction in both the proportion and average size of the inclusions,resulting in their effective dispersion throughout the matrix and improved cryogenic *** presence of Ce-containing inclusions within the matrix reduces stress concentration,thereby inhibiting microcrack formation and improving impact absorption ***-cally,the addition of rare earth Ce alters the fracture behavior of the material at room temperature and low temperature,changing from brittle cleavage fracture to a more ductile failure *** impact toughness of the Fe-Mn-C-Al alloy is significantly improved by the addition of 0.0048 wt.%Ce,particularly at-196℃where the impact toughness reaches 103.6 J/cm^(2),representing an impressive improvement of 87.3%.

关键词： Fe-Mn-C-Al alloy Rare earth Low-temperature toughness Inclusion Fracture

Phase Patterning of Poly(oxime-ester) for Information Encryption by Photo-induced Isomerization

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Chinese Journal of Polymer Science 2024年第10期42卷 1488-1494页

作者： Yu-Fan Yang Yun Bai yi-Bao li chang-Fei He School of Chemistry and Chemical Engineering Gannan Normal University

Crystal polymers or liquid crystal elastomers undergo a phase transition that results in a change in the corresponding optical properties, which has the potential to be applied in areas such as information encryption and anti-counterfeiting. The utilization of these materials for patterning purposes requires different phase transition temperatures. However, once prepared, altering the phase transition temperature of them presents significant challenges. Herein, a poly(oxime-ester)(POE) network is developed to achieve high-resolution and multilevel patterning by photo-induced isomerization. The as-prepared POE exhibits the ability to transition from an opaque state to a transparent state under temperature stimuli, with the transition temperature and kinetics dependent on UV light exposure time. Thus, complex patterns and information can be encrypted through different selective regional exposure time and decrypted under specific temperature or cooling time. Furthermore, we illustrate an example of temporal communication, where cooling time or temperature serves as the encoded information. This research expands the application scope of advanced encryption materials, showcasing the potential of POE in dynamic information encryption and decryption processes.

关键词： Information encryption Isomerization Phase patterning Poly(oxime-ester)

Broadband absorption performance of 3D-printed polyetheretherketone-based electromagnetic wave-absorbing composites

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Chinese Journal of Aeronautics 2024年第8期37卷 547-558页

作者： lin BAI Nan chang Meiying ZHAO Chi HOU yi CAO Dichen li School of Aeronautics Northwestern Polytechnical UniversityXi’an 710072China Chengdu Aircraft Design and Research Institute Chengdu 610091China Xi’an Key Laboratory of Advanced Structure Design and Application of Aircraft Northwestern Polytechnical UniversityXi’an 710072China State Key Laboratory for Manufacturing System Engineering Xi’an Jiaotong UniversityXi’an 710054China

The rapid development of additive manufacturing technology has offered a new avenue for designing and fabricating high wave-absorbing meta *** this study,the mechanical properties and broadband absorption performance of Poly-Ether-Ether-Ketone(PEEK)–based electromagnetic wave–absorbing composite materials was *** high-performance polymer PEEK was used as the matrix,and the materials with electromagnetic wave loss,such as reduced graphene oxide,Carbonyl Iron(CI),and Flake CI(FCI),were used as *** on the theory of impedance matching,a wave-absorbing structure with a gradual impedance gradient was designed and *** test results showed that at the 2.0–18.0 GHz frequency band,the coverage rate of the effective absorption bandwidth was up to 72.0%,the average optimal reflectivity was–18.09 dB,and the wide-angle absorption range was 0°–30°.The advantages of additive manufacturing technology in designing and fabricating wave-absorbing structures are presented,demonstrating that the technology is an effective method for creating broadband absorbing structures.

关键词： Absorption performance Additive manufacturing Electromagnetic absorption PEEK composite materials Gradual structure Broadband absorption

Salvianolic acid B decreases interleukin-1b-induced colitis recurrence in mice

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Chinese Medical Journal 2020年第12期133卷 1436-1444页

作者： Pan-Pan Feng Xue-Sheng Fang Si-Hui Zhao Jun-Yan Fu Hui-Ting Zhang Yan-lin yi chang-yi li Chun-ling Jiang Da-Peng Chen Teaching and Research Section of Comparative Medicine Dalian Medical UniversityDalianLiaoning 116044China Laboratory Animal Center Dalian Medical UniversityDalianLiaoning 116044China Teaching and Research Section of Physiology Dalian Medical UniversityDalianLiaoning 116044China

Background:Degree of mucosal recovery is an important indicator for evaluating the therapeutic effects of drugs in treatment of inflammatory bowel disease(IBD).Increasing evidences has proved that tight junction(TJ)barrier dysfunction is one of the pathological mechanisms of *** aim of this study was to observe whether enhancement of TJ can decrease colitis ***:Eighty C57BL/6 mice were randomly divided into four groups including normal group,colitis group,sulfasalazine(SASP)treated group,and traditional Chinese drug salvianolic acid B(Sal B)treated *** was established in mice by free drinking water containing dextran sulfate sodium,after treatments by SASP and Sal B,recombinant human interleukin-1b(IL-1b)was injected intraperitoneally to induce colitis ***:Compared with sham control,cell apoptosis in colitis group was increased from 100.85±3.46%to 162.89±11.45%(P=0.0038),and TJ dysfunction marker myosin light chain kinase(MLCK)was also significantly increased from 99.70±9.29%to 296.23±30.78%(P=0.0025).The increased cell apoptosis was reversed by both SASP(125.99±8.45%vs.162.89±11.45%,P=0.0059)and Sal B(104.27±6.09%vs.162.89±11.45%,P=0.0044).High MLCK expression in colitis group was reversed by Sal B(182.44±89.42%vs.296.23±30.78%,P=0.0028)but not influenced by SASP(285.23±41.04%vs.296.23±30.78%,P>0.05).The recurrence rate induced by recombinant human IL-1b in Sal B-treated group was significantly lower than that in SASP-treated ***:These results suggested a link between intestinal mucosal barrier dysfunction,especially TJ barrier dysfunction,and colitis *** TJ barrier dysfunction in remission stage of colitis increased the colitis *** study might provide potential treatment strategies for IBD recurrence.

关键词： Colitis Inflammatory bowel disease Recurrence Tight junctions

Host-induced silencing of MpPar6 confers Myzus persicae resistance in transgenic rape plants

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Journal of Integrative Agriculture 2024年第1期23卷 187-194页

作者： Qi Zhang Wenqin Zhan Chao li ling chang yi Dong Jiang Zhang State Key Laboratory of Biocatalysis and Enzyme Engineering School of Life SciencesHubei UniversityWuhan 430062China Oil Crops Research Institute Chinese Academy of Agricultural SciencesWuhan 430062China Agricultural Genomics Institute at Shenzhen Chinese Academy of Agricultural SciencesShenzhen 518000China

Plant-mediated RNA interference(RNAi)has emerged as a promising technology for insect *** green peach aphid,Myzus persicae,feeds on over 400 species of host *** napus(rape)is the second most important oilseed crop *** persicae is highly reproductive and causes severe damage to the rape plants due to its quite flexible life *** this study,we tested the RNAi effects of transgenic rape plants on *** in vitro feeding *** with artificial diets containing double-stranded RNAs(dsRNAs)targeting seven aphid genes,we identified a new gene encoding the partitioning-defective protein 6(Par6)as the most potent RNAi ***-and stage-expression analysis of Par6 suggested this gene is highly expressed in the embryo and adult stage of *** next generated transgenic rape plants expressing ds Par6 by Agrobacteriummediated transformation and obtained nine independent transgenic *** to wild-type control plants,transgenic rape lines expressing ds Par6 showed strong resistance to *** assays revealed that feeding transgenic rape plants to *** significantly decreased MpPar6 expression and survival rate and impaired ***,we showed that the resistance levels to *** are positively correlated with ds Par6 expression levels in transgenic rape *** study demonstrates that transgenic rape plants expressing ds Par6 are efficiently protected from *** with the genes involved in embryo development could be the effective RNAi targets for controlling aphids and potentially other insect pests.

关键词： oilseed rape pest control aphid double-stranded RNA RNA interference