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Coupling WO_(3-x) dots-encapsulated metal-organic frameworks and template-free branched polymerization for dual signal-amplified electrochemiluminescence biosensing

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Chinese Chemical Letters 2024年第4期35卷 469-474页

作者： Fei Yin Erli Yang Xue Ge Qian Sun Fan mo Guoqiu Wu Yanfei Shen Medical School Southeast UniversityNanjing 210009China Center of Clinical Laboratory Medicine Zhongda HospitalSoutheast UniversityNanjing 210009China Jiangsu Provincial Key Laboratory of Critical Care Medicine Southeast UniversityNanjing 210009China

Developing accurate and sensitive DNA methyltransferase(MTase) analysis methods is essential for early clinical diagnosis and development of antimicrobial drug targets. In this work, by coupling WO_(3-x) dotsencapsulated metal-organic frameworks(moFs) as co-reactants and terminal deoxynucleotidyl transferase(Td T)-mediated template-free branched polymerization, a dual signal-amplified electrochemiluminescent(ECL) biosensor was constructed to detect DNA adenine methylation(Dam) MTase. The employment of WO_(3-x) dots-encapsulated moFs(i.e., NH_(2)-UIO66@WO_(3-x) ) was not only beneficial for biomolecule conjugation because of the abundant amino groups but also led to a 7-fold enhanced ECL response due to the increased loading of WO_(3-x). moreover, Td T-mediated template-free branched polymerization promoted the capture of ECL emitters on the electrode surface, achieving 20-fold enhanced signal amplification. The presented ECL biosensor demonstrated a low detection limit of 2.4 × 10^(-4)U/m L, and displayed high reliability for the detection of Dam MTase in both spiked human serum and E. coli cell samples, and for the screening of potential inhibitors. This study opens a new avenue for designing a dual signal amplificationbased ECL bioassay for Dam MTase and screening inhibitors in the fields of clinical diagnosis and drug development.

关键词： Dual signal-amplified electrochemiluminescence WO_(3-x)dots moFs Template-free branched polymerization DNA methyltransferase

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中药抗肿瘤机制中的11种信号通路

中国实验方剂学杂志 2018年第21期24卷 205-218页

作者：洪梓德莫志贤南方医科大学第一临床医学院广州510515 南方医科大学中医药学院广州510515

细胞信号转导是指胞外信号刺激细胞,导致多种信号分子相互转换,最终产生对应的生物学功能的过程。各种细胞内外信号分子通过细胞内的信号转导过程,调节离子通道、代谢酶、转录因子等的活性,而参与了疾病发生、发展的各个方面。随着分子... 详细信息

细胞信号转导是指胞外信号刺激细胞,导致多种信号分子相互转换,最终产生对应的生物学功能的过程。各种细胞内外信号分子通过细胞内的信号转导过程,调节离子通道、代谢酶、转录因子等的活性,而参与了疾病发生、发展的各个方面。随着分子生物学的进一步发展,各种实验研究逐渐提高大家对肿瘤的发生机制和参与调控肿瘤细胞增殖、分化、血管形成、侵袭、转移的信号通路的认识。细胞内信号通路失调,最终造成细胞增殖与凋亡异常是细胞癌变的主要机制之一,针对这些重要的信号通路的分子靶向治疗可以逆转、延迟、阻止致癌过程。大量临床实践表明,中医药在肿瘤的治疗中已经表现出以下几个方面的疗效优势,减轻放化疗的毒副作用、改善临床症状、提高生存质量、稳定瘤体、术后防治肿瘤转移复发、延长生存期和提高生存率。以往许多实验研究表明,抗肿瘤中药可从多条途径调节细胞信号转导通路,而发挥抗肿瘤作用。本文通过检索相关文献,对近几年有关中药抗肿瘤的相关实验进行归纳,总结出这些抗肿瘤中药研究中所涉及的11种信号通路,以期为后续更进一步的研究提供参考。

关键词：中药抗肿瘤机制信号通路激活研究进展

Innovative construction of macroporous–mesoporous structured spherical alumina and its hydrothermal stability

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Particuology 2024年第7期90卷 429-435页

作者： Yufan mo Chunli Li Huiyu Li Wei Han He Wen Yinghong Han Chunxia Che Yongjun Feng State Key Laboratory of Chemical Resource Engineering Beijing Engineering Center for Hierarchical CatalystsCollege of ChemistryBeijing University of Chemical TechnologyBeijing100029China Lanzhou Petrochemical Research Center Petrochemical Research InstitutePetroChinaLanzhou730060China

The pore structure of spherical alumina supports is closely related to the dispersion of catalytically active components and the diffusion of *** excellent pore structure under strict reaction conditions is of utmost *** this work,sphericalγ-Al_(2)O_(3)support with a bimodal pore structure,composed of macropores and mesopores,was successfully synthesized using dodecane as the pore-forming agent through the oil–ammonia column-shaping *** morphology and internal pore structure of the alumina were found to be influenced by the amount of surfactant added and ultrasound treatment ***,when concentration of surfactant was 4‰and ultrasound voltage of 20 V was applied,the resultingγ-Al_(2)O_(3)-4‰-20 displayed a highly concentrated distribution of macropores with an average pore size of 100 nm,resulting in an impressive porosity of 69.21%.In contrast,the untreated sample ofγ-Al_(2)O_(3)-0-0 only exhibited a mesoporous distribution with a porosity of 54.03%.moreover,after being subjected to a hydrothermal treatment in a high temperature(600°C)and high humidity(water vapor)environment for 120 h,theγ-Al_(2)O_(3)-4‰-20 sample maintained a high BET specific surface area of 170.9 m^(2)g^(−1)and mercury intrusion porosimetry specific surface area of 263.3 m^(2)g^(−1).

关键词： Spherical alumina supports Pore-forming agent Oil-ammonia column shaping method Hydrothermal treatment Hydrothermal stability

Sulfated Cyclocarya paliurus polysaccharides exert immunomodulatory potential on macrophages via Toll-like receptor 4 mediated MAPK/NF-κB signaling pathways

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Food Science and Human Wellness 2024年第1期13卷 115-123页

作者： Yue Yu Haibin Zhu Mingyue Shen Qiang Yu Yi Chen Shiru mo Jianhua Xie State Key Laboratory of Food Science and Technology Nanchang UniversityNanchang 330047China International Institute of Food Innovation Nanchang UniversityNanchang 330200China

The biological activity of plant polysaccharides can be enhanced by sulfated *** this study,the immunomodulatory effect of sulfated Cyclocarya paliurus polysaccharides(SCP3)on macrophages RAW264.7 and its potential molecular mechanism were *** showed that SCP3 at 25-100μg/m L increased viability and improved phagocytosis of RAW264.7 ***,SCP3 could activate mitogen-activated protein kinase(MAPK)and nuclear factor kappa B(NF-κB)signaling pathways,which increased the phosphorylation of Erk1/2,JNK,p38 and NF-κB p65,promoting secretion of cytokines tumor necrosis factorα(TNF-α),interleukin 6(IL-6)and nitric oxide(NO)as well as the production of reactive oxygen species(ROS).In addition,Toll-like receptor 4(TLR4)receptor inhibitors were able to block the production of NO and TNF-αby SCP3-stimulated *** on Western blot analysis and validation using specific inhibitors against MAPK and NF-κB signaling pathways,the results demonstrated that SCP3 induced macrophages activation and enhanced TNF-αand NO production via TLR4-mediated MAPK and NF-κB *** summary,SCP3 has significant immunomodulatory *** underlying molecular mechanism was that SCP3 activates macrophages via TLR4 receptors to promote ROS production,which in turn activates the downstream MAPK/NF-κB signaling pathway and then increases the secretion levels of cytokines and NO.

关键词： Cyclocarya paliurus Sulfated polysaccharides Macrophages Immunomodulatory Mechanism

Development of immature ovarian teratoma after mature teratoma in a girl with familial ovarian teratoma:A case report

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World Journal of Clinical Cases 2024年第8期12卷 1442-1447页

作者： U Chul Ju Woo Dae Kang Seok mo Kim Department of Obstetrics and Gynecology Chonnam National University Medical SchoolGwangju 61469South Korea

BACKGROUND Immature ovarian teratoma is a rare and aggressive neoplasm that affects young *** report is the first to describe the development of immature teratoma after ovarian cystectomy for mature teratoma of the ovary in an adolescent female with a family history of ovarian *** SUMMARY A 16-year-old girl who had undergone bilateral ovarian cystectomy for mature teratomas 3 years ago showed bilateral adnexal tumors during her regular ultrasonography follow-up every 6 *** received laparoscopic bilateral ovarian cystectomy,and final histopathology showed grade-1 immature teratoma of the left ovary and mature teratoma of the right *** left salpingo-oophorectomy and staging procedures were performed *** mother,maternal aunt,and maternal grandmother had also received surgeries for mature ovarian *** It is important to have guidance on management of patient and family members with familial ovarian teratomas.

关键词： Familial ovarian teratomas Adolescent female Immature ovarian teratoma Management Case report

Distributed Application Addressing in 6G Network

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China Communications 2024年第4期21卷 193-207页

作者： Liu Jie Chen Sibo Liu Yuqin mo zhiwei Lin Yilin Zhu Hongmei He Yufeng China Telecom Research Institute Guangzhou 510632China

To ensure the extreme performances of the new 6G services,applications will be deployed at deep edge,resulting in a serious challenge of distributed application *** paper traces back the latest development of mobile network application addressing,analyzes two novel addressing methods in carrier network,and puts forward a 6G endogenous application addressing scheme by integrating some of their essence into the 6G network architecture,combining the new 6G capabilities of computing&network convergence,endogenous intelligence,and communication-sensing *** paper further illustrates how that the proposed method works in 6G networks and gives preliminary experimental verification.

关键词： application addressing CNC(Computing&Network Convergence) DNS(Domain Name System) ICN(Information-Centric Network) 6G

Ferroptosis in chronic obstructive pulmonary disease:From cellular mechanisms to therapeutic applications

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Chinese Medical Journal 2024年第10期137卷 1237-1239页

作者： Mengli Yan Shiyu Xu Han Wang Shoujin Dong Chunheng mo The Key Laboratory of Birth Defects and Related Diseases of Women and Children of moE State Key Laboratory of BiotherapyWest China Second University HospitalSichuan UniversityChengduSichuan 610041China Department of Nephrology Henan Provincial Clinical Research Center for Kidney DiseaseHenan Provincial Key Laboratory of Kidney Disease and ImmunologyHenan Provincial People’s Hospital and People’s Hospital of Zhengzhou UniversityZhengzhouHenan 450000China Department of Biochemistry School of MedicineCase Western Reserve UniversityClevelandOH 44106USA Center for RNA Science and Therapeutics School of MedicineCase Western Reserve UniversityClevelandOH 44106USA Department of Pulmonary and Critical Care Medicine Chengdu First People’s HospitalChengduSichuan 610095China

To the Editor:Chronic obstructive pulmonary disease(COPD)is a global public health challenge without effective treatment currently available,affecting>300 million individuals *** understanding the pathogenesis of this disease is ***,ferroptosis,a form of cell death driven by iron-dependent lipid peroxidation,has been associated with the pathogenesis of COPD.[1]Multiple signaling pathways,such as glutathione peroxidase 4(GPX4),ferroptosis suppressor protein 1(FSP1),and tetrahydrobiopterin-dependent pathways,as well as iron metabolism,are involved in regulating ferroptosis[2,3][Figure 1A].Here,we provide a comprehensive overview of recent advances in understanding the role of ferroptosis in COPD,highlighting potential therapeutic strategies targeting ferroptosis for treating the disease.

关键词： therapeutic metabolism peroxidation

Comprehensive treatment of von Hippel-Lindau disease:A case report

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Cancer Innovation 2024年第2期3卷 63-67页

作者： Xuesong Li Zheng mo Zhuo Yu School of Clinical Medicine Tsinghua UniversityBeijingChina Department of Oncology Beijing Tsinghua Changgung HospitalBeijingChina

von Hippel-Lindau(VHL)disease is a rare autosomal dominant multiorgan disease characterized by several benign and malignant tumors rich in vascular,as well as cysts in other organs.A great clinical treatment strategy is significantly warranted for good prognosis of patients with VHL ***,we reported a case of a 45-year-old woman diagnosed with VHL disease with spinal hemangioblastoma(HB)and clear cell renal cell carcinoma(ccRCC).Four years after the resection of the right kidney,a recurrent RCC in the right kidney and a malignant lesion in the left kidney were *** patient was started on sorafenib(800 mg,daily)and tislelizumab(200 mg per 3 weeks).After 6 months of treatment,the size of renal cell carcinoma was dramatically reduced and renal function *** importantly,she achieved partial response during the whole ***,intramedullary masses resection was done and the HB in T4-5 thoracic spinal was *** symptoms such as numbness and pain were remarkably ***,tislelizumab-induced elevation in liver transaminase levels and hypothyroidism were revered by hepatoprotector and levothyroxine,*** short,comprehensive treatment strategies may benefit patients with VHL disease,especially with HB and ccRCC.

关键词： sorafenib surgery tislelizumab treatment von Hippel-Lindau disease

青风藤及青藤碱对吗啡依赖小鼠位置偏爱效应和脑内组胺水平的影响

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南方医科大学学报 2006年第12期26卷 1709-1713页

作者：莫志贤安胜利周吉银南方医科大学中医药学院广东广州510515 南方医科大学生物统计学系广东广州510515

目的探讨中药青风藤及其有效成分青藤碱对吗啡诱导的小鼠条件性位置偏爱(CPP)及脑内组胺(HA)水平的影响。方法采用位置偏爱箱法,连续皮下注射吗啡(9mg/kg·b.w.)6d,引起小鼠产生显著的条件性位置偏爱效应。实验分空白对照组、吗啡模型组... 详细信息

目的探讨中药青风藤及其有效成分青藤碱对吗啡诱导的小鼠条件性位置偏爱(CPP)及脑内组胺(HA)水平的影响。方法采用位置偏爱箱法,连续皮下注射吗啡(9mg/kg·b.w.)6d,引起小鼠产生显著的条件性位置偏爱效应。实验分空白对照组、吗啡模型组(9mg/kg·b.w.)、青风藤醇提液组(10g/kg·b.w.)、青藤碱组(60mg/kg·b.w.)、苯海拉明组(30mg/kg·b.w.)、CP48/80组(5mg/kg·b.w.)和L-组氨酸组(750mg/kg·b.w.),后5个给药组分别在位置偏爱训练的第4天开始给药,连续用药3d。脑内组胺含量采用荧光分光光度法测定。本实验同时检测青风藤、青藤碱、苯海拉明、CP48/80及L-组氨酸对小鼠的奖赏效应或厌恶效应。结果吗啡模型组小鼠在伴药箱中停留的时间明显延长,小鼠脑内HA水平显著升高(P<0.01)。青风藤或青藤碱连续用药可显著抑制吗啡引起的小鼠位置偏爱的形成,降低脑内的HA含量。青风藤、青藤碱及L-组氮酸对正常小鼠脑内组脑水平有升高作用(P<0.01),但3药本身并不使小鼠产生奖赏或厌恶效应。CP48/80能使正常及吗啡依赖小鼠脑内组胺含量明显减少(P<0.01),但该药对CPP无明显影响。结论吗啡诱导的小鼠位置偏爱效应与脑内HA水平升高、中枢组胺能神经系统激活有关。青风藤及青藤碱能消除吗啡诱导的小鼠条件性位置偏爱的形成,对脑内组胺水平的改变具有调节作用。

关键词：青风藤青藤碱吗啡条件性位置偏爱组胺