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Synthesis of demethoxy-amino-substituted hypocrellins: novel photosensitizers for photodynamic therapy

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Chinese Chemical Letters 2000年第11期11卷 963-966页

作者： Wu, T xu, sj Shen, JQ Chen, S Zhang, MH Shen, T Chinese Acad Sci Inst Chem Ctr Mol Sci Beijing 100080 Peoples R China

A novel method was used to obtain demethoxy-amino-substituted hypocrellin derivatives. Peri-hydroxylated perylenequinone structure of hypocrellin was reserved when hypocrellin reacted with an amine in pyridine. The products were new compounds with significant cytoxicity against tumor cells. Their structures have been established on the basis of their mass and H-1 NMR spectra.

关键词： Synthesis of demethoxy-amino-substituted hypocrellins novel photosensitizers for photodynamic therapy

A PAT STUDY OF INFLUENCES OF PRECIPITATION ON DEFECTS AND ELECTRONIC DENSITY IN Al-Li-Cu-Mg-Zr ALLOYS

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中国有色金属学会会刊：英文版 1997年第1期7卷 43-46页

作者： Wu, WM Gao, YJ Luo, LX Deng, W xu, sj Zhong, XP Jiang, XJ GUANGXI UNIV DEPT PHYSNANNING 530004PEOPLES R CHINA ACAD SINICA INST MET RESSHENYANG 110015PEOPLES R CHINA

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关键词： positron lifetime spectra Al Li Cu Mg Zr alloy ageing precipitation defects bulk electronic density

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建立胫骨癌痛模型的理论与实践

中国组织工程研究与临床康复 2007年第4期11卷 740-742页

作者：许少健刘金文项红兵广东省中医院骨三科广东省广州市510120 广东省中医院麻醉科广东省广州市510120

目的:骨癌痛动物模型已有报道,但还没有可接受的与人类骨癌痛相一致的模型。综述胫骨癌痛模型的研究进展及相关治疗前景。资料来源:应用计算机检索Medline1996-01/2006-03相关胫骨、癌痛和治疗的文献,检索词“tibial,cancerpain,therapy... 详细信息

目的:骨癌痛动物模型已有报道,但还没有可接受的与人类骨癌痛相一致的模型。综述胫骨癌痛模型的研究进展及相关治疗前景。资料来源:应用计算机检索Medline1996-01/2006-03相关胫骨、癌痛和治疗的文献,检索词“tibial,cancerpain,therapy”,并限定文献语言种类为English。同时检索万方数据库1996-01/2006-05文献,检索词为“胫骨癌痛”,并限定语言种类为中文。资料选择:对资料进行初审,选取包括胫骨、癌痛和治疗的文献,开始查找全文。纳入标准:①胫骨和癌痛。②癌痛和治疗。排除标准:综述文献、重复研究、Meta分析类文章。资料提炼:共收集到51篇关于胫骨、癌痛和治疗的文献,纳入30篇关于胫骨和癌痛,癌痛和治疗的文献。资料综合:①目前认为,胫骨癌痛动物模型的疼痛表现与临床上所见的骨转移症状相似,可视为转移性骨癌痛模型。②恶性肿瘤骨损害的特征性变化是溶骨性骨吸收和恶性肿瘤疼痛本身,随骨质破坏的加剧,疼痛逐渐增强,移动或轻触可以引发急性痛,在到达极度痛之前,常因运动、负重或自发地间断发生突破痛,其发生的程度和频率与骨质破坏和溶骨活性成正相关。③目前从胫骨癌痛的实验研究中发现可供选择的药物主要有阿片类药、5-羟色胺受体阻断剂、抗惊厥药物加巴喷丁、环氧化酶2抑制剂表皮生长因子阻断剂。结论:利用动物胫骨癌痛模型来研究人类骨癌痛是可行的,但其研究有待进一步深入。从胫骨癌痛的实验研究中发现有许多药物可供选择,这展示了药物治疗骨癌痛的应用前景。

关键词：胫骨疼痛肿瘤/并发症治疗疾病模型,动物

HBeAg阴性慢性乙型肝炎患者血清HBV-DNA和ALT的关系

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世界华人消化杂志 2005年第23期13卷 2809-2810页

作者：韩学吉许顺姬崔鹤松延边大学医学院附属医院感染科检验科吉林省延吉市133000

目的:探讨HBeAg阴性慢性乙型肝炎患者血清HBV-DNA与 ALT相互关系．方法:选择HBeAg阴性慢乙肝82例,分为A群(ALT为正常的 1-2倍)及B群(ALT>正常的2倍)采用Hitachi7600全自动生化分析仪检查肝功,采用Abbott Axsym System(美国)检查乙肝病毒... 详细信息

目的:探讨HBeAg阴性慢性乙型肝炎患者血清HBV-DNA与 ALT相互关系．方法:选择HBeAg阴性慢乙肝82例,分为A群(ALT为正常的 1-2倍)及B群(ALT>正常的2倍)采用Hitachi7600全自动生化分析仪检查肝功,采用Abbott Axsym System(美国)检查乙肝病毒学,采用PCR定量法(Cobas Amplicor HBV Monitor testTM)检查血清HBV-DNA定量．结果:患者血清HBV-DNA中位数是2．7×108(200-4．7×1010)copies ／mL,A群HBV-DNA中位数是5．6×107(200-4．7×1010)copies／ mL,B群HBV-DNA中位数是1．0×109(200-1．7×1010)copies／mL, B群比A群明显高(P<0．001)．另外,A群及B群各自的血清HBV- DNA值及ALT值间无明显相关性,但总的82例患者血清HBV- DNA值及ALT值间有明显相关性(r=0．416,P<0．001),HBeAg阴性慢乙肝血清ALT上升之前血清HBV-DNA值上升．结论:定期复查HBV-DNA,及时应用抗病毒药物可预防及避免急性恶化,也可以减少肝硬化及肝癌的发生率．

关键词：慢性乙型肝炎 HBeAg HBV—DNA ALT

Aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders:progress of experimental models based on disease pathogenesis

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Neural Regeneration Research 2025年第2期20卷 354-365页

作者： Li xu Huiming xu Changyong Tang Department of Neurology The Third Affiliated Hospital of Sun Yat-sen UniversityGuangzhouGuangdong ProvinceChina

Neuromyelitis optica spectrum disorders are neuroinflammatory demyelinating disorders that lead to permanent visual loss and motor *** date,no effective treatment exists as the exact causative mechanism remains ***,experimental models of neuromyelitis optica spectrum disorders are essential for exploring its pathogenesis and in screening for therapeutic *** most patients with neuromyelitis optica spectrum disorders are seropositive for IgG autoantibodies against aquaporin-4,which is highly expressed on the membrane of astrocyte endfeet,most current experimental models are based on aquaporin-4-IgG that initially targets *** experimental models have successfully simulated many pathological features of neuromyelitis optica spectrum disorders,such as aquaporin-4 loss,astrocytopathy,granulocyte and macrophage infiltration,complement activation,demyelination,and neuronal loss;however,they do not fully capture the pathological process of human neuromyelitis optica spectrum *** this review,we summarize the currently known pathogenic mechanisms and the development of associated experimental models in vitro,ex vivo,and in vivo for neuromyelitis optica spectrum disorders,suggest potential pathogenic mechanisms for further investigation,and provide guidance on experimental model *** addition,this review summarizes the latest information on pathologies and therapies for neuromyelitis optica spectrum disorders based on experimental models of aquaporin-4-IgG-seropositive neuromyelitis optica spectrum disorders,offering further therapeutic targets and a theoretical basis for clinical trials.

关键词： aquaporin-4 experimental model neuromyelitis optica spectrum disorder pathogenesis

Mitophagy in acute central nervous system injuries:regulatory mechanisms and therapeutic potentials

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Neural Regeneration Research 2025年第9期20卷 2437-2453页

作者： Siyi xu Junqiu Jia Rui Mao Xiang Cao Yun xu Department of Neurology Nanjing Drum Tower HospitalClinical College of Jiangsu UniversityNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalChinese Academy of Medical Science&Peking Union Medical CollegeNanjingJiangsu ProvinceChina Department of Neurology Nanjing Drum Tower HospitalAffiliated Hospital of Medical SchoolNanjing UniversityNanjingJiangsu ProvinceChina State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases Nanjing UniversityNanjingJiangsu ProvinceChina Jiangsu Key Laboratory for Molecular Medicine Medical School of Nanjing UniversityNanjingJiangsu ProvinceChina Nanjing Neurology Medical Center NanjingJiangsu ProvinceChina

Acute central nervous system injuries,including ischemic stro ke,intracerebral hemorrhage,subarachnoid hemorrhage,traumatic brain injury,and spinal co rd injury,are a major global health *** optimal therapies and improving the long-term neurological functions of patients with acute central nervous system injuries are urgent *** are susceptible to damage after acute central nervous system injury,and this leads to the release of toxic levels of reactive oxygen species,which induce cell ***,a selective form of autophagy,is crucial in eliminating redundant or damaged mitochondria during these *** evidence has highlighted the significant role of mitophagy in acute central nervous system *** this review,we provide a comprehensive overview of the process,classification,and related mechanisms of *** also highlight the recent developments in research into the role of mitophagy in various acute central nervous system injuries and drug therapies that regulate *** the final section of this review,we emphasize the potential for treating these disorders by focusing on mitophagy and suggest future research paths in this area.

关键词： autophagy intracerebral hemorrhage ischemic stroke mitochondria mitochondrial biogenesis mitochondrial quality control mitophagy spinal cord injury subarachnoid hemorrhage traumatic brain injury

Inspires effective alternatives to backpropagation:predictive coding helps understand and build learning

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Neural Regeneration Research 2025年第11期20卷 3215-3216页

作者： Zhenghua xu Miao Yu Yuhang Song School of Health Sciences and Biomedical Engineering Hebei University of TechnologyTianjinChina Department of Computer Science University of OxfordOxfordUK

Artificial neural networks are capable of machine learning by simulating the hiera rchical structure of the human *** enable learning by brain and machine,it is essential to accurately identify and correct the prediction errors,referred to as credit assignment(Lillicrap et al.,2020).It is critical to develop artificial intelligence by understanding how the brain deals with credit assignment in neuroscience.

关键词： assignment learning enable

Copper-catalyzed C–H bond functionalization enabled by programmed alternating current

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Science China Chemistry 2025年第01期 10-11页

作者： Zhoumei Tan Kun xu Chengchu Zeng Beijing Key Laboratory of Environmental and Viral Oncology College of Chemistry and Life Science Beijing University of Technology

Synthetic electrochemistry has been selected as one of the Top Ten Emerging Technologies in Chemistry in 2023 by International Union of Pure and Applied Chemistry (IUPAC)[1]. It has emerged as a sustainable platform for organic synthesis and has exhibited a wide range of applications from academia to industry [2]. However, electrosynthesis has been predominantly performed by using direct current (DC).

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Role of iron ore in enhancing gasification of iron coke:Structural evolution,influence mechanism and kinetic analysis

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 58-69页

作者： Jie Wang Wei Wang xuheng Chen Junfang Bao Qiuyue Hao Heng Zheng Runsheng xu School of Chemistry and Materials Science Hubei Engineering UniversityXiaogan 432000China Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education Wuhan University of Science and TechnologyWuhan 430081China Institue of Ironmaking Technology Baosteel Central Research InstituteShanghai 201999China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

The utilization of iron coke provides a green pathway for low-carbon *** uncover the influence mechanism of iron ore on the behavior and kinetics of iron coke gasification,the effect of iron ore on the microstructure of iron coke was ***,a comparative study of the gasification reactions between iron coke and coke was conducted through non-isothermal thermogravimetric *** findings indicate that compared to coke,iron coke exhibits an augmentation in micropores and specific surface area,and the micropores further extend and *** provides more adsorption sites for CO_(2) molecules during the gasification process,resulting in a reduction in the initial gasification temperature of iron *** the heating rate in non-isothermal gasification can enhance the reactivity of iron *** metallic iron reduced from iron ore is embedded in the carbon matrix,reducing the orderliness of the carbon structure,which is primarily responsible for the heightened reactivity of the carbon *** kinetic study indicates that the random pore model can effectively represent the gasification process of iron coke due to its rich pore ***,as the proportion of iron ore increases,the activation energy for the carbon gasification gradually decreases,from 246.2 kJ/mol for coke to 192.5 kJ/mol for iron coke 15wt%.

关键词： low-carbon ironmaking iron coke gasification structural evolution kinetic model