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槐角提取物对颌骨骨髓间充质干细胞成骨向分化的影响

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中国口腔颌面外科杂志 2024年第1期22卷 23-28页

作者：林惠高云飞刘晶马旭辉上海市儿童医院上海交通大学医学院附属儿童医院口腔科上海200062 上海市第八人民医院口腔科上海200030 上海交通大学医学院附属第九人民医院口腔第二门诊上海200011 上海交通大学医学院附属第九人民医院口腔颌面-头颈肿瘤科上海交通大学口腔医学院国家口腔医学中心国家口腔疾病临床医学研究中心上海市口腔医学重点实验室上海市口腔医学研究所上海200011

目的 :探讨槐角提取物对颌骨骨髓间充质干细胞(jaw bone marrow mesenchymal stem cells,jBMSCs)成骨分化的影响。方法:采用CCK-8法检测10、25、50、100μmol/L槐角提取物溶液对jBMSCs增殖的影响,采用BCIP/NBT碱性磷酸酯酶显色、茜素红... 详细信息

目的 :探讨槐角提取物对颌骨骨髓间充质干细胞(jaw bone marrow mesenchymal stem cells,jBMSCs)成骨分化的影响。方法:采用CCK-8法检测10、25、50、100μmol/L槐角提取物溶液对jBMSCs增殖的影响,采用BCIP/NBT碱性磷酸酯酶显色、茜素红染色检测10、25、50μmol/L槐角提取物溶液对jBMSCs成骨分化水平的影响,采用蛋白免疫印迹试验(Western blot)和实时定量荧光PCR检测槐角提取物溶液对jBMSCs成骨分化相关分子的蛋白和mRNA表达水平的影响。采用GraphPad Prism 9软件包对数据进行统计学分析。结果:100μmol/L槐角提取物溶液对jBMSCs有明显毒性作用(P0.05)。与对照组相比,10、25和50μmol/L组的碱性磷酸酶活性、钙结节数量、成骨分化相关分子的蛋白和mRNA表达水平均逐渐升高。结论:10、25、50μmol/L浓度的槐角提取物能促进jBMSCs成骨向分化。

关键词：槐角提取物颌骨骨髓间充质干细胞成骨向分化细胞增殖

Synthesis and Properties of pH and Temperature Responsive Copolymer with Pesudorotaxane Structure

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Chemical Research in Chinese Universities 2012年第6期28卷 1101-1106页

作者： ma Qiang YANG hui xu Wen-chao TAN Ye-bang Key Laboratory of Special Functional Aggregated materials Ministry of EducationSchool of Chemistry and Chemical Engineering Shandong University Jinan 250100 P. R. China

pH and temperature responsive copolymers PNAM4VBCB of N-isopropyl acrylamide（NAM） and complex pseudorotaxane monomer N 1-（4-vinylbenzyl）-1,4-diaminobutane dihydrochloride with cucurbit[6]uril（CB[6]） threaded（4VBCB） were prepared via free-radical polymerization in aqueous *** copolymers were characterized by 1 H NMR,Fourier transform infrared（FTIR） spectrometry,elemental analysis,and static light *** thermodynamic properties of the copolymers were studied by thermogravimetric analysis（TGA）,and the effects of pH and the concentration of the copolymer on the average hydrodynamic radius（R h） were studied by dynamic light scattering（DLS）.In addition,the thermal sensitivities of the copolymers were studied by DLS and *** experiment data show that CB[6] beads are localized on 1,4-diaminobutane units in the side chains of the *** data show that thermal stability of the copolymers increases with the adding of CB[6] threaded because of the enhanced rigidity and the bulky steric hindrance of 4VBCB in the side chain of *** data show that the average hydrodynamic radius of copolymer increases with the increase of the copolymer concentration and has a jump with adjusting pH due to the existing of the small size CB[6] dethreaded from the copolymer with increasing *** pH and electrical conductivity curves of the solution of PNAM4VBCB-4 have a jump because CB[6] could dethread from the copolymers with the addition of *** addition,the copolymers have thermal sensitivity and their phase-change temperatures could be controlled by adjusting the molar ratio of NAM to 4VBCB in the copolymers.

关键词： Cucurbituril Thermal sensitivity Water soluble copolymer Polypseudorotaxane

基于DRG付费管理的骨创伤患者手术部位感染直接经济负担评价

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中国感染控制杂志 2024年第7期23卷 868-873页

作者：陈音汁马会旭周明川叶和梅成燕刘四云重庆大学附属人民医院重庆市人民医院医院感染控制处重庆401147 重庆大学附属人民医院重庆市人民医院关节骨科重庆401147 重庆大学附属人民医院重庆市人民医院病案管理科重庆401147

目的评价疾病诊断相关分组(DRG)付费管理方式下骨创伤患者发生手术部位感染(SSI)造成的直接经济负担。方法回顾性调查2022年5月1日—2023年5月30日某三级甲等医院骨创伤患者的临床资料,根据是否发生SSI进行分组,比较同一DRG细分组下发生... 详细信息

目的评价疾病诊断相关分组(DRG)付费管理方式下骨创伤患者发生手术部位感染(SSI)造成的直接经济负担。方法回顾性调查2022年5月1日—2023年5月30日某三级甲等医院骨创伤患者的临床资料,根据是否发生SSI进行分组,比较同一DRG细分组下发生SSI患者和非SSI患者的平均住院日数、平均住院费用等指标之间的差异,分析发生SSI造成的直接经济负担。结果研究共纳入435例按照DRG付费管理的手术患者,其中22例患者发生SSI,SSI发病率为5.06%;SSI组患者平均住院日数及平均住院费用均高于非SSI组患者,差异有统计学意义(P<0.05)。SSI患者的DRG细分组主要分布在IF45、IF15、IJ13、ZC13四组,其中IF45、IF15、ZC13组中SSI患者的平均住院时间明显增加(P<0.05),IJ13组中SSI患者平均住院费用明显增加(P<0.05)。结论在DRG付费管理方式下,骨创伤患者发生SSI明显增加患者直接经济负担,需不定期评估发现高风险DRG细分组患者,以期采取精准感控干预,降低SSI发病率。

关键词：疾病诊断相关分组手术部位感染骨创伤医院感染经济负担 DRG SSI

Electromagnetic fields in ultra-peripheral relativistic heavy-ion collisions

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Nuclear Science and Techniques 2024年第2期35卷 103-109页

作者： Jie Zhao Jin-hui Chen xu-Guang Huang Yu-Gang ma Key Laboratory of Nuclear Physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Shanghai Research Center for Theoretical Nuclear Physics NSFC and Fudan UniversityShanghai 200438China Physics Department and Center for Particle Physics and Field Theory Fudan UniversityShanghai 200438China

Ultra-peripheral heavy-ion collisions(UPCs)offer unique opportunities to study processes under strong electromagnetic *** these collisions,highly charged fast-moving ions carry strong electromagnetic fields that can be effectively treated as photon *** exchange of photons can induce photonuclear and two-photon interactions and excite *** excitation of the ions results in Coulomb dissociation with the emission of photons,neutrons,and other ***,the electromagnetic fields generated by the ions can be sufficiently strong to enforce mutual interactions between the two colliding ***,the two colliding ions experience an electromagnetic force that pushes them in opposite directions,causing a back-to-back correlation in the emitted *** a Monte Carlo simulation,we qualitatively demonstrate that the above electromagnetic effect is large enough to be observed in UPCs,which would provide a clear means to study strong electromagnetic fields and their effects.

关键词： Electromagnetic fields Neutrons Ultra-peripheral relativistic heavy-ion collisions(UPC)

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玉米花青素生物合成代谢调控

生物技术通报 2024年第6期40卷 34-44页

作者：胡锦锦李素贞马旭辉柳小庆谢珊珊江海洋陈茹梅安徽农业大学生命科学学院合肥230036 中国农业科学院生物技术研究所北京100081

花青素(anthocyanidin)以糖苷形式与葡萄糖或纤维二糖分子结合存在,是一类水溶性天然色素,广泛存在于自然界中的果蔬和花卉中。花青素具有抗氧化、抗炎、抗肿瘤以及抑制病毒生长等生理活性,因此在食品和医药领域具有广阔的应用前景。随... 详细信息

花青素(anthocyanidin)以糖苷形式与葡萄糖或纤维二糖分子结合存在,是一类水溶性天然色素,广泛存在于自然界中的果蔬和花卉中。花青素具有抗氧化、抗炎、抗肿瘤以及抑制病毒生长等生理活性,因此在食品和医药领域具有广阔的应用前景。随着对植物花青素合成途径的深入研究,花青素生物合成途径逐渐清晰,但是花青素调控基因以及机制仍有很大的探索空间。紫玉米是一种富含花青素的作物,其花青素生物合成途径的研究具有重要的实际意义。近年来,研究人员在富含花青素玉米研究中取得了较大进展,但在花青素玉米的精准育种方面有待进一步研究。本文从玉米的花青素生物合成途径、关键酶基因和调控基因等方面进行综述,系统分析了玉米花青素合成途径中各个结构基因以及MYB、bHLH、WD40等调控基因对花青素合成的影响;阐述了MBW三元复合物对花青素的调控;讨论了富含花青素玉米育种中尚未解决的问题及未来研究方向,以期为今后开展花青素玉米遗传改良以及选育高花青素玉米品种提供参考。

关键词：花青素玉米生物合成代谢调控

Growth,optical dispersion and magnetic behavior of Dy^(3+) doped yttrium iron garnet crystals

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Journal of Rare Earths 2024年第6期42卷 1110-1117,I0004页

作者： Yating Fang hui Shen Yudie ma Shijie Liao Shuang Xia Tian Tian Ding Zhou Yunfeng ma Jiayue xu Institute of Crystal Growth School of Materials Science and EngineeringShanghai Institute of Technology National Engineering Center of Electromagnetic Radiation Control materials School of Electronic Science and EngineeringUniversity of Electronic Science and Technology of China

Y_(3)Fe_(5)O_(12)(YIG)crystals are highly desirable for the fabrication of mid-infrared isolators with the rapid growth of optical communications,although it is rather challenging to grow large size and high-quality single ***^(3+)doping is expected to improve the optical and magneto-optical prope ***,high quality Dy:YIG crystals and the adjustment of Dy^(3+)on the structure and optical behavior of YIG crystal remain unclear,impeding its practical ***,a series of Y_(3-x)Dy_(x)Fe_(5)O_(12)(x=0,0.5,1.0,1.5,3)solid solution crystals was grown by the flux-Bridgman method and single crystals up to 25 mm were *** the introduction of Dy^(3+),lattice parameters are gradually enlarged from 1.2379 nm(YIG)to 1.2420 nm(DyIG).Typical Dy^(3+)absorption peaks are observed around 1070,1265 and 1670 *** refractive index decreases from 2.37(500 nm)to 2.10(2500 nm)for YIG crystal,and it reduces from 2.47(500 nm)to 2.16(2500 nm)for DyIG *** optical bandgaps remain almost unchanged for Dy:YIG *** optical dispersion of the refractive indices was finely fitted by the Wemple and DiDomenico(WDD)and the Sellmeier models,*** the increase of Dy^(3+)content,the saturation magnetization(Ms)decreases significantly from 23.62 emu/g(YIG)to 5.33 emu/g(DyIG).Small coercive field is persisted for this system,endowing small external magnetic *** results provide valuable references for the manipulation of rare earths on the properties of magnetooptical crystals,which is beneficial to the design of high-performance garnet crystals for the application of optical switching and non-reciprocal related devices.

关键词： magneto-optical crystal Yttrium iron garnet Dy^(3+)doping Crystal growth Optical dispersion Rare earths

Cancer organoids:A platform in basic and translational research

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Genes & Diseases 2024年第2期11卷 614-632页

作者： Xin ma Qin Wang Guozheng Li hui Li Shouping xu Da Pang Department of Breast Surgery Harbin Medical University Cancer HospitalHarbinHeilongjiang 150081China Sino-Russian Medical Research Center Harbin Medical University Cancer HospitalHarbinHeilongjiang 150081China Heilongjiang Academy of Medical Sciences HarbinHeilongjiang 150086China Department of Pharmacology (The State-Province Key Laboratories of Biomedicine-Pharmaceutics of China) College of Pharmacy of Harbin Medical UniversityHarbinHeilongjiang 150086China

An accumulation of previous work has established organoids as good preclinical models of human tumors,facilitating translation from basic research to clinical *** are changing the paradigm of preclinical cancer research because they can recapitulate the heterogeneity and pathophysiology of human cancers and more closely approximate the complex tissue environment and structure found in clinical tumors than in vitro cell lines and animal ***,the potential applications of cancer organoids remain to be comprehensively *** the review,we firstly describe what is currently known about cancer organoid culture and then discuss in depth the basic mechanisms,including tumorigenesis and tumor metastasis,and describe recent advances in patient-derived tumor organoids(PDOs)for drug screening and immunological ***,the present challenges faced by organoid technology in clinical practice and its prospects are *** review highlights that organoids may offer a novel therapeutic strategy for cancer research.

关键词： Drug assays Immunotherapy Mechanism research Organoids Precision medicine

Doping engineering of iron oxide nanoparticles towards high performance and biocompatible T_(1)-weighted MRI contrast agents

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Rare Metals 2024年第1期43卷 298-308页

作者： xue xu Ping-Li Dong Yu-Yun Chai Run Yang Zhen-hui ma Chi-Chong Lu Department of Chemistry College of Chemistry and Materials EngineeringBeijing Technology and Business UniversityBeijing 100048China Department of Physics Beijing Technology and Business UniversityBeijing 100048China

Extremely small-sized iron oxide nanoparticles(IONPs) are of great interest in magnetic resonance imaging(MRI) due to their biosafety as an alternative to clinical gadolinium(Ⅲ) complexes-based contrast *** when the particle size is less than 10 nm,it has strong diffusion ability and deep penetration distance in tumor *** doping can significantly enhance the T_(1)contrast effect of nanoparticles by regulating the surface exposed ***,the nucleation and growth processes of multi-component synthesis systems are complex and difficult to be accurately controlled,leading to great challenges in the synthesis of ultra-small-sized nanoparticles with different components and ***,extremely smallsized superparamagnetic gadolinium-doped iron oxide nanoparticles(GdIONPs,Gd_(x)Fe_(3-x)O_(4) NPs) with adjustable doping amount and controllable size in the range of 3.5-7.5 nm were synthesized by thermal ***,as-synthesized GdIONPs were surface modified with a highly water-soluble and biocompatible carboxyl-polyethylene glycol-phosphoric acid ligand with high binding ***_(0.65)Fe_(2.35)O_(4) NPs exhibited very high r_(1) relaxivity of 10.6 mmol^(-1)·L·s^(-1) in terms of all metal concentrations and 49.0 mmol^(-1)·L·s^(-1) in terms of gadolinium alone,respectively,3 and 14 times higher than clinical T_(1) contrast agents(Gd-DTPA).GdIONPs can continuously obtain high resolution images of blood vessels,and can be used as an efficient and multifunctional contrast agent for MR T_(1)*** stable and efficient doping strategy provides an easy and effective method to individually optimize the magnetic properties of complex oxides and their relaxation effects for a variety of biomedical applications.

关键词： Iron oxide nanoparticles Small size magnetic resonance imaging Substitutional doping Gd dopant

Covalent triazine frameworks materials for photo-and electrocatalysis

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Nano Research 2024年第9期17卷 7830-7839页

作者： Aoji Liang Wenbin Li Anbai Li hui Peng Guofu ma Lei Zhu Ziqiang Lei Yuxi xu Key Laboratory of Eco-functional Polymer materials of the Ministry of Education Key Laboratory of Polymer Materials of Gansu ProvinceCollege of Chemistry and Chemical EngineeringNorthwest Normal UniversityLanzhou 730070China School of Chemistry and materials Science Hubei Key Laboratory of Quality Control of Characteristic Fruits and VegetablesHubei Engineering UniversityXiaogan 432000China School of Engineering Westlake UniversityHangzhou 310024China

Covalent triazine frameworks(CTFs)are a class of unique two-dimensional nitrogen-rich triazine framework with adjustable chemical and electronic structures,rich porosity,good stability and excellent semiconductivity,which enable great various applications in efficient gas/molecular adsorption and separation,energy storage and conversion,especially photo-and *** synthesis strategies strongly affect the morphology of CTFs and play an important role in their structure and *** this concept,we provide a comprehensive and systematic review of the synthesis methods such as ionothermal synthesis,phosphorus pentoxide catalytic method,polycondensation and ultra-strong acid catalyzed method,and applications of CTFs in photo-and *** we offer some insights into the future development progress of CTFs materials for catalytic applications.

关键词： covalent triazine frameworks synthetic strategy photocatalysis electrocatalysis