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Targeted isolation of antitubercular cycloheptapeptides and an unusual pyrroloindoline-containing new analog,asperpyrroindotide A,using LC–MS/MS-based molecular networking

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Marine Life Science & Technology 2023年第1期5卷 85-93页

作者： Yi-Qian Han Qun Zhang wei-Feng Xu yang Hai Rong Chao Cui-Fang Wang Xue-mei Hou mei-yan wei Yu-Cheng Gu Chang-Yun Wang Chang-Lun Shao Key Laboratory of Marine Drugs the Ministry of Education of ChinaSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004China College of Food Science and Engineering Ocean University of ChinaQingdao 266003China Syngenta Jealott’s Hill International Research Centre BracknellBerkshire RG426EYUK Laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

Further insights on the secondary metabolites of a soft coral-derived fungus Aspergillus versicolor under the guidance of MS/MS-based molecular networking led to the isolation of seven known cycloheptapeptides,namely,asperversiamides A–C(1–3)and asperheptatides A–D(4–7)and an unusual pyrroloindoline-containing new cycloheptapeptide,asperpyrroindotide A(8).The structure of 8 was elucidated by comprehensive spectroscopic data analysis,and its absolute configuration was determined by advanced Marfey’s *** semisynthetic transformation of 1 into 8 was successfully achieved and the reaction conditions were ***,a series of new derivatives(10−19)of asperversiamide A(1)was semi-synthesized and their anti-tubercular activities were evaluated against Mycobacterium tuberculosis *** preliminary structure−activity relationships revealed that the serine hydroxy groups and the tryptophan residue are important to the activity.

关键词： Marine natural product MS/MS-based molecular networking Cycloheptapeptides Semi-synthesis Anti-tubercular activity

Discovery of a natural small‑molecule AMP‑activated kinase activator that alleviates nonalcoholic steatohepatitis

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Marine Life Science & Technology 2023年第2期5卷 196-210页

作者： Jin Chen Li Xu Xue-Qing Zhang Xue Liu Zi-Xuan Zhang Qiu-mei Zhu Jian-Yu Liu Muhammad Omer Iqbal Ning Ding Chang-Lun Shao mei-yan wei Yu-Chao Gu Key Laboratory of Marine Drugs the Ministry of EducationSchool of Medicine and PharmacyOcean University of ChinaQingdao 266003China Laboratory for Marine Drugs and Bioproducts Laoshan LaboratoryQingdao 266237China College of Food Science and Engineering Ocean University of ChinaQingdao 266003China Key Laboratory of Glycoscience and Glycotechnology of Shandong Province Qingdao 266003China The Massachusetts General Hospital Cancer Center Harvard Medical SchoolBostonMA 02114USA

Non-alcoholic steatohepatitis(NASH)is a primary cause of cirrhosis and hepatocellular ***,there is no approved drug treatment for ***-activated kinase(AMPK)is an important metabolic sensor and whole-body *** has been proposed that AMPK activators could be used for treating metabolic diseases such as obesity,type 2 diabetes and *** this study,we screened a marine natural compound library by monitoring AMPK activity and found a potent AMPK activator,candidusin A(CHNQD-0803).Further studies showed that CHNQD-0803 directly binds recombinant AMPK with a K_(D) value of 4.728×10^(-8) M and activates AMPK at both molecular and intracellular *** then investigated the roles and mechanisms of CHNQD-0803 in PA-induced fat deposition,LPS-stimulated infammation,TGF-β-induced fbrosis cell models and the MCD-induced mouse model of *** results showed that CHNQD-0803 inhibited the expression of adipogenesis genes and reduced fat deposition,negatively regulated the NF-κB-TNFαinfammatory axis to suppress infammation,and ameliorated liver injury and *** data indicate that CHNQD-0803 as an AMPK activator is a novel potential therapeutic candidate for NASH treatment.

关键词： NASH AMPK Infammation Lipid metabolism Fibrosis Marine drug

Structure modification,antialgal,antiplasmodial,and toxic evaluations of a series of new marine-derived 14-membered resorcylic acid lactone derivatives

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Marine Life Science & Technology 2022年第1期4卷 88-97页

作者： wei-Feng Xu Na-Na Wu yan-wei Wu Yue-Xuan Qi mei-yan wei Laura M.Pineda Michelle G.Ng Carmenza Spadafora Ji-Yong Zheng Ling Lu Chang-Yun Wang Yu-Cheng Gu Chang-Lun Shao Key Laboratory of Marine Drugs the Ministry of Education of ChinaSchool of Medicine and PharmacyOcean University of ChinaQingdao266003China Laboratory for Marine Drugs and Bioproducts Qingdao National Laboratory for Marine Science and TechnologyQingdao266237China State Key Laboratory for Marine Corrosion and Protection Luoyang Ship Material Research Institute(LSMRI)Qingdao266237China Center of Cellular and Molecular Biology of Diseases Instituto de Investigaciones Científcas y Servicios de Alta TecnologíaCity of KnowledgeClaytonApartado0816-02852Panama Syngenta Jealott’s Hill International Research Centre BracknellBerkshireRG426EYUK

Marine natural products play critical roles in the chemical defense of many marine organisms and are essential,reputable sources of successful drug ***-seven 14-membered resorcylic acid lactone derivatives 3–27 and 30–71 of the natural product zeaenol(1)isolated from the marine-derived fungus Cochliobolus lunatus were semisynthesized by chlorination,acylation,esterification,and acetalization in one to three *** structures of these new derivatives were established by HRESIMS and NMR *** the compounds(1–71)were evaluated for their antialgal and antiplasmodial *** them,14 compounds displayed antifouling activities against adhesion of the fouling *** particular,9 and 34 exhibited strong and selective inhibitory effects against the diatoms Navicula laevissima and Navicula exigua(EC50=6.67 and 8.55μmol/L),respectively,which were similar in efficacy to those of the positive control SeaNine 211(EC50=2.90 and 9.74μmol/L).More importantly,38,39,and 69–71 showed potent antiplasmodial activities against Plasmodium falciparum with IC50 values ranging from 3.54 to 9.72μmol/*** interestingly,the five antiplasmodial derivatives displayed non-toxicity in the cytotoxicity assays and the zebrafish embryos model,thus,representing potential promising antiplasmodial drug *** preliminary structure–activity relationships indicated that biphenyl substituent at C-2,acetonide at positions C-5′and C-6′,and tri-or tetra-substituted of acyl groups increased the antiplasmodial ***,combining evaluation of chemical ecology with pharmacological models will be implemented as a systematic strategy,not only for environmentally friendly antifoulants but also for structurally novel drugs.

关键词： Marine natural product 14-Membered resorcylic acid lactone Zeaenol Semisynthesis Antialgal activity Antiplasmodial activity

Brain region-specific roles of brain-derived neurotrophic factor in social stress-induced depressive-like behavior

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Neural Regeneration Research 2025年第1期20卷 159-173页

作者： Man Han Deyang Zeng wei Tan Xingxing Chen Shuyuan Bai Qiong Wu Yushan Chen Zhen wei Yufei mei yan Zeng Brain Science and Advanced Technology Institute Wuhan University of Science and TechnologyWuhanHubei ProvinceChina Geriatric Hospital Affiliated to Wuhan University of Science and Technology WuhanHubei ProvinceChina School of Public Health Wuhan University of Science and TechnologyWuhanHubei ProvinceChina

Brain-derived neurotrophic factor is a key factor in stress adaptation and avoidance of a social stress behavioral *** studies have shown that brain-derived neurotrophic factor expression in stressed mice is brain region–specific,particularly involving the corticolimbic system,including the ventral tegmental area,nucleus accumbens,prefrontal cortex,amygdala,and *** how brain-derived neurotrophic factor participates in stress processing in different brain regions will deepen our understanding of social stress *** this review,we discuss the expression and regulation of brain-derived neurotrophic factor in stress-sensitive brain regions closely related to the pathophysiology of *** focused on associated molecular pathways and neural circuits,with special attention to the brain-derived neurotrophic factor–tropomyosin receptor kinase B signaling pathway and the ventral tegmental area–nucleus accumbens dopamine *** determined that stress-induced alterations in brain-derived neurotrophic factor levels are likely related to the nature,severity,and duration of stress,especially in the above-mentioned brain regions of the corticolimbic ***,BDNF might be a biological indicator regulating stress-related processes in various brain regions.

关键词： amygdala chronic mild stress chronic social defeat stress corticolimbic system depression hippocampus medial prefrontal cortex nucleus accumbens social stress models ventral tegmental area

Solar cycles during the seventeenth century revealed by equatorial aurora records

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Earth and Planetary Physics 2025年第1期9卷 182-187页

作者： Yong wei Limei yan Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China College of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China

Solar cycles are fundamental to astrophysics,space exploration,technological infrastructure,and Earth's climate.A better understanding of these cycles and their history can aid in risk mitigation on Earth,while also deepening our knowledge of stellar physics and solar system *** the solar cycles between 1600 and 1700-especially the post-1645 Maunder Minimum,characterized by significantly reduced solar activity-poses challenges to existing solar activity *** study utilizes a new red equatorial auroral catalog from ancient Korean texts to establish solar cycle patterns from 1623 to ***,a further reevaluation of the solar cycles between 1610 and 1755 identified a total of 13 cycles,diverging from the widely accepted record of 12 cycles during that *** research enhances our understanding of historical solar activity,and underscores the importance of integrating diverse historical sources into modern analyses.

关键词： solar cycle Maunder Minimum solar activity red equatorial aurora West Pacific geomagnetic anomaly

Curve fitting and optimal interpolation on CNC machines based on quadratic B-splines

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Science China(Information Sciences) 2011年第7期54卷 1407-1418页

作者： ZHANG mei 1,yan wei 2,YUAN ChunMing 1,WANG DingKang 1 & GAO XiaoShan 1 1 Key Laboratory of Mathematics Mechanization,Academy of Mathematics and Systems Science,Chinese Academy of Sciences,Beijing 100190,China 2 Research Institute of Petroleum Exploration and Development,Beijing 100083,China 1. Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China2. Research Institute of Petroleum Exploration and Development Beijing 100083 China

In this paper,curve fitting of 3-D points generated by G01 codes and interpolation based on quadratic B-splines are *** points of G01 codes are selected using an adaptive ***,quadratic B-splines are obtained as the fitting curve by interpolating these feature *** required in implementing the velocity planning algorithm mentioned by Timer et *** very complicated because of the appearance of high-order *** improved time-optimal method for the quadratic B-spline curves is presented to circumvent this *** algorithms are verified with simulations as well as on real CNC machines.

关键词： quadratic B-spline G01 codes feature point velocity planning interpolation

Pringle肝门阻断术对老年患者术中末梢灌注指数及无创血红蛋白准确性的影响

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中华老年多器官疾病杂志 2017年第2期16卷 85-88页

作者：方岩梅伟华中科技大学同济医学院附属同济医院麻醉科武汉430030

目的探讨Pringle肝门阻断术对老年患者术中末梢灌注指数(PI)及无创脉搏血红蛋白(SpHb)准确性的影响。方法入选2013年6月至2014年1月期间华中科技大学同济医学院附属同济医院收治的>60岁患者43例,全麻下行择期肝脏手术。于Pringle肝门阻... 详细信息

目的探讨Pringle肝门阻断术对老年患者术中末梢灌注指数(PI)及无创脉搏血红蛋白(SpHb)准确性的影响。方法入选2013年6月至2014年1月期间华中科技大学同济医学院附属同济医院收治的>60岁患者43例,全麻下行择期肝脏手术。于Pringle肝门阻断前后记录同一时间的PI、SpHb和有创血红蛋白(Hb)。Bland-Altman分析和线性回归模型评估Pringle肝门阻断前后的PI和SpHb测量误差(SpHb与有创Hb差值的绝对值)。结果肝门阻断前后分别收集有效试验数据:44对和73对。肝门阻断前PI>1.4的数据占77.3%,SpHb测量误差≤1 g/dl的数据占75.0%,SpHb偏倚值为0.62 g/dl,95%CI为-1.15~2.38 g/dl。肝门阻断后PI>1.4的数据占67.1%,SpHb测量误差≤1 g/dl的数据占35.6%,SpHb偏倚值为1.12 g/dl,95%CI为-0.98~3.23 g/dl。PI与SpHb测量误差呈显著负相关(r=-0.32,P<0.05)。结论 Pringle肝门阻断术通过降低老年患者的PI,增加了SpHb的测量误差;阻断后指导输血应当参考有创Hb的测量值。

关键词： Pringle肝门阻断灌注指数无创血红蛋白

Morphology engineering of ZnO micro/nanostructures under mild conditions for optoelectronic application

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International Journal of Minerals,Metallurgy and Materials 2025年第2期32卷 498-503页

作者： Liang Chu Haoyu Shen Hudie wei Hongyu Chen Guoqiang Ma Wensheng yan Institute of Carbon Neutrality and New Energy&School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China School of Applied Physics and Materials Wuyi UniversityJiangmen 529020China

Zinc oxide(ZnO)serves as a crucial functional semiconductor with a wide direct bandgap of approximately 3.37 *** reaction is commonly used in the synthesis of ZnO micro/nanostructures,given its low cost,simplicity,and easy ***,ZnO morphology engineering has become desirable through the alteration of minor conditions in the reaction process,particularly at room *** this work,ZnO micro/nanostructures were synthesized in a solution by varying the amounts of the ammonia added at low temperatures(including room temperature).The formation of Zn^(2+)complexes by ammonia in the precursor regulated the reaction rate of the morphology engineering of ZnO,which resulted in various structures,such as nanoparticles,nanosheets,microflowers,and single ***,the obtained ZnO was used in the optoelectronic application of ultraviolet detectors.

关键词： morphology engineering low temperature ZnO nanosheets microflowers ultraviolet detector

Metal nanoparticles decorated CoFe-(oxy)hydroxysulfides nanosheets fabricated by a general strategy for electrocatalytic water splitting

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Journal of Energy Chemistry 2025年第1期100卷 26-38页

作者： Xiaodong yang Haochen Shen Xiaoming Xiao Zhichao Li Qi Zhou wei yang Bin Jiang Yongli Sun Luhong Zhang Zhenhua yan School of Chemical Engineering and Technology Tianjin University Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education) Nankai University

This study presents a novel method to fabricate metal-decorated,sulfur-doped layered double hydroxides （M/SLDH） through spontaneous redox and sulfurization *** developed Ag/SLDH and Pt/SLDH catalysts with abundant heterogeneous interfaces and hierarchical nanostructures demonstrated outstanding oxygen evolution reaction （OER） and hydrogen evolution reaction （HER） performance,achieving low overpotentials of 212 and 35 mV at 10 mA cm-2in 1 M KOH,*** both anode and cathode in water splitting,they required only 1.47 V to reach 10 mA cm-2and exhibited high structural robustness,maintaining stability at 1000 mA cm-2for 300 ***-situ Raman analysis revealed that the synergistic effects of metal nanoparticles and S doping significantly promote the transformation into the S-Co1-xFexOOH layer,which serves as the active phase for water ***,ultraviolet photoelectron spectroscopy （UPS） and density functional theory （DFT） analyses indicated that incorporating metal nanoparticles and S doping increase electron density near the Fermi level and reduce reaction energy barriers,thus enhancing intrinsic OER and HER *** study provides a scalable strategy for synthesizing high-performance electrocatalysts for water splitting,with promising potential for broader applications.

关键词： LDH Spontaneous reaction Metal nanoparticles Water splitting