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Five new 5,6-seco-tremulane sesquiterpenoids from the basidiomycete Conocybe siliginea

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Natural Products and Bioprospecting 2013年第2期3卷 48-51页

作者： Xiao-Yan YANG Tao FENG jian-hai ding Xia YIN Hua GUO Zheng-Hui LI Ji-Kai LIU State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences Beijing 100049China

Five new 5,6-seco-tremulane sesquiterpenoids(1-5),as well as three known analogues(6-8),were isolated from the basidiomycete Conocybe *** structures of new compounds were elucidated by extensive spectroscopic *** know... 详细信息

关键词： Conocybe siliginea 5 6-seco-tremulane sesquiterpenoids

Two new drimane sesquiterpenoids from cultures of the basidiomycete Trichaptum biforme

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Natural Products and Bioprospecting 2013年第4期3卷 154-157页

作者： Xiao-Yan YANG Tao FENG jian-hai ding Zheng-Hui LI Yan LI Qiong-Ying FAN Ji-Kai LIU State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China University of Chinese Academy of Sciences Beijing 100049China Hebei Normal University Hebei 050024China

Two new drimane sesquiterpenoids(1 and 2),as well as five known compounds(3-7),were isolated from the basidiomycete Trichaptum *** structures of new compounds were elucidated by extensive spectroscopic methods,and the known compounds were identified by comparing their spectroscopic data with those reported in the *** cytotoxicities results against five human cancer cell lines of compounds 1 and 2 were negligible.

关键词： Trichaptum biforme drimane sesquiterpenoids cytotoxicity

Inhibitory effects of 1-methyl-4-phenylpyridinium on glutamate uptake into cultured C6 glioma cells

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Acta Pharmacologica Sinica 2004年第7期 9-14页

作者： Hong-hong YAO, jian-hua ding, hai-rong HE, Gang HU2 Department of Pharmacologyand Neurobiology, Nanjing Medical University, Nanjing 210029, China

AIM: To investigate the effect of 1-methyl-4-phenylpyridinium (MPP+) on the glutamate uptake into cultured C6 glioma cells. METHODS: The glutamate uptake into C6 glioma cells was measured by radio-ligand binding assay method. The effect of MPP+ on the morphology of C6 glioma cells was observed under phase contrast microscopy; apoptosis of C6 glioma cells were measured by FITC-labeled Annexin V staining and flow cytometry. Cell viability was measured by MTT method. RESULTS: MPP+inhibited glutamate uptake into C6 glioma cells. However, MPP+ failed to induce any morphological changes of C6 glioma cells, and exposure to MPP+ had no effect on the viability and the apoptotic percentage of C6 glioma cells. Incubation with 12-O-tetradecanoylphorbol -13-acetate (TPA), a protein kinase C activator, caused a significant increase in glutamate uptake and completely reversed MPP+-induced inhibitory effect on glutamate uptake. CONCLUSION: The present results indicate that glutamate transporters mayhave important pathogeneticimplications in Parkinson disease. MPP+-inducedinhibition ofglutamate uptake was due to the dysfunction of glutamate transporters; TPA enhanced glutamate uptake and completely reversed the inhibitory effect of MPP+.

关键词： methyl-4-phenylpyridinium glutamate acid glioma apoptosis 4-O-methyl-12-O-tetradecanoyl- phorbol-13-acetate

Maintaining moderate levels of hypochlorous acid promotes neural stem cell proliferation and differentiation in the recovery phase of stroke

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Neural Regeneration Research 2025年第3期20卷 845-857页

作者： Lin-Yan Huang Yi-De Zhang Jie Chen hai-Di Fan Wan Wang Bin Wang Ju-Yun Ma Peng-Peng Li hai-Wei Pu Xin-Yian Guo jian-Gang Shen Su-Hua Qi School of Medical Technology Xuzhou Key Laboratory of Laboratory DiagnosticsXuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Pharmacy Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina Department of Laboratory Medicine Branch Hospital of Huai’an First People’s HospitalHuai’anJiangsu ProvinceChina Department of Laboratory Medicine the Affiliated Hospital of Xuzhou Medical UniversityXuzhouJiangsu ProvinceChina School of Chinese Medicine The University of Hong KongHong Kong Special Administrative RegionChina

It has been shown clinically that continuous removal of ischemia/reperfusion-induced reactive oxygen species is not conducive to the recovery of late ***,previous studies have shown that excessive increases in hypochlorous acid after stroke can cause severe damage to brain *** previous studies have found that a small amount of hypochlorous acid still exists in the later stage of stroke,but its specific role and mechanism are currently *** simulate stroke in vivo,a middle cerebral artery occlusion rat model was established,with an oxygen-glucose deprivation/reoxygenation model established in vitro to mimic *** found that in the early stage(within 24 hours)of ischemic stroke,neutrophils produced a large amount of hypochlorous acid,while in the recovery phase(10 days after stroke),microglia were activated and produced a small amount of hypochlorous ***,in acute stroke in rats,hypochlorous acid production was prevented using a hypochlorous acid scavenger,taurine,or myeloperoxidase inhibitor,4-aminobenzoic acid *** results showed that high levels of hypochlorous acid(200μM)induced neuronal apoptosis after oxygen/glucose deprivation/***,in the recovery phase of the middle cerebral artery occlusion model,a moderate level of hypochlorous acid promoted the proliferation and differentiation of neural stem cells into neurons and *** suggests that hypochlorous acid plays different roles at different phases of cerebral ischemia/reperfusion *** levels of hypochlorous acid(5 and 100μM)promoted nuclear translocation ofβ-*** transfection of single-site mutation plasmids,we found that hypochlorous acid induced chlorination of theβ-catenin tyrosine 30 residue,which promoted nuclear ***,our study indicates that maintaining low levels of hypochlorous acid plays a key role in the recovery of neurological function.

关键词： cell differentiation cerebral ischemia/reperfusion injury chlorination hypochlorous acid microglia neural stem cell neurogenesis nuclear translocation stroke β-catenin

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Investigating the pharmacological basis and mechanisms of the anti-thrombotic effects of Paeoniae Radix Rubra， both pre- and post-stir-frying with rice wine

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Food Science and Human Wellness 2025年

作者： Jiaxu Zhang jian Guan Ajiao Hou Wenying Niu haixue Kuang Liu Yang hai jiang Key Laboratory of Basic and Application Research of Beiyao， Heilongjiang University of Chinese Medicine， Ministry of Education

Paeoniae Radix Rubra (PRR) is a commonly used traditional Chinese medicine known for promoting blood circulation and alleviating pain. Stir-frying PRR with rice wine enhances its effectiveness in improving blood flow and resolving stasis. To explore the pharmacodynamic basis and mechanisms behind PRR's anti-thrombotic effects—both pre- and post-stir-frying—a comprehensive approach combining pharmacological research， metabolomics， and chemistry was employed. Fraction inter-cross validation experiments， pharmacological assessments， and metabolomic analyses confirm the efficacy of the fraction separation process. Wine-stir-fried PRR (WPRR) shows superior blood activation compared to PRR. PRR mainly affects the TCA cycle and sphingolipid metabolism pathways through its small molecules， enhancing coagulation and fibrinolysis systems' functionality. All the subdivided components of WPRR have anti-thrombotic effects， especially polysaccharides and oligosaccharides. WPRR improves thrombotic conditions in rat blood stasis by modulating arachidonic acid metabolism， TCA cycle， lipid status enhancement， and angiogenesis stimulation while regulating platelet adhesion and aggregation. In conclusion， compared with PRR， the main material basis for the blood-activating efficacy of WPRR has transformed from small molecule compounds to polysaccharide and oligosaccharide components. The action pathways of WPRR in exerting anti-thrombotic efficacy have increased. The polysaccharide components in WPRR might possess considerable potential for being developed into natural anti-thrombotic drugs.

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热分解法制备喷涂用Co-Cr-V复合粉末

粉末冶金工业 2018年第1期28卷 11-14页

作者：石建萍丁海萍周筱锡林郭勒职业学院褐煤粉煤灰工程技术研究院

采用热分解法制备喷涂用Co-Cr-V复合粉末,并测定其物相及元素组成、粉末平均粒径以及电位,分析其微观组织形貌与溶液pH值之间的关系。结果表明：采用热分解法,V与Cr原子都已进入到Co金属基体的晶格内,得到Co-Cr-V置换固溶体结构。不同p... 详细信息

采用热分解法制备喷涂用Co-Cr-V复合粉末,并测定其物相及元素组成、粉末平均粒径以及电位,分析其微观组织形貌与溶液pH值之间的关系。结果表明：采用热分解法,V与Cr原子都已进入到Co金属基体的晶格内,得到Co-Cr-V置换固溶体结构。不同pH值条件下制备得到的复合粉末颗粒均具有球形微观结构并存在团聚现象。随着溶液pH值的增加,复合粉末颗粒互相接触并团聚为大尺寸块状结构。当溶液pH值较小时,Zeta电位与等电位点存在较大偏差,颗粒分散性良好;随溶液pH值增大,粉末颗粒发生明显团聚,颗粒平均粒径随之增大。

关键词：热分解法复合金属粉末显微组织粒径

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Oxygen vacancies enriched Ir/WOx catalysts for the directly chem-catalytic conversion of cellulose to ethanol

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Tungsten 2025年第1期7卷 88-99页

作者： Yu-Jing Weng Zhao-Ying ding Ying-Chao Li Yuan-Feng Wu Yuan-Yang Xu Rui Chen Xiao-Lei Zhao hai-Yong Wang Da-Lei Zhang Yu-Long Zhang Henan Key Laboratory of Coal Green Conversion and International Joint Laboratory of Coal Clean Utilization College of Chemistry and Chemical Engineering Henan Polytechnic University Key Laboratory of Renewable Energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Liaoning Institute of Energy Technology

Tungsten and its oxides are highly versatile catalysts with unique properties that hold great promise for a wide array of applications,including biological pathways and chemical *** chemo-catalysis of cellulose to ethanol presents a promising avenue for ethanol synthesis with the potential for enhanced efficiency compared to conventional methods,offering a sustainable and carbon-neutral alternative to existing petrochemical and biological ***,Ir/WOxcatalysts enriched with oxygen vacancies were meticulously prepared and demonstrated remarkable catalytic performance in converting cellulose to ethanol directly in the presence of tungstic *** catalyst achieved a high ethanol yield of 66.5%under optimal reaction conditions,approaching the theoretical yield limit of traditional ethanol *** results revealed the presence of oxygen defects,Bronsted/Lewis acidity,and Ir nanoclusters on the catalyst surface,working synergistically to facilitate the cascade catalysis of cellulose hydrolysis,sugar retro-aldol condensation reaction,and C2 intermediate hydrodeoxygenation to *** situ Fourier transform infrared spectrometer analysis confirmed the catalyst's ability to enhance the adsorption and activation of ethylene glycol for ethanol *** manipulating subtle structural features,this study offers a fresh perspective on tungsten group catalyst design and underscores the importance of synergistic effects among catalytic sites for the efficient production of ethanol from cellulose.

关键词： Cellulosic ethanol Chem-catalysis Hydrogenolysis Retro-aldol condensation Tungsten

Stable copper boron–imidazolate cage as Cu-riched enzyme for highly efficient electrocatalytic CO2 reduction to ethylene

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Science China Chemistry 2025年

作者： Jun-Qiang Chen Qiao-Hong Li Qin-Long Hong Ping Shao hai-Xia Zhang jian Zhang State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Single-atom catalyst has garnered widespread attention to mimic mature enzymes due to its well-defined atomic structure and coordination environments. However, since the carbon–carbon（C–C） coupling reactions require synergistic catalysis of multiple sites, single-atom catalysts suffer from insufficient active sites and unclear reaction mechanisms. Controlling the reaction intermediates in a precisely targeted pocket through careful metal–organic cage design is therefore crucial. Here, we prepare a tetrahedral [Cu6L4]-type boron–imidazolate cage integrating highly active Cu sites and optimized cavity, which exhibits enzyme like specific catalytic performance in electrochemical CO2reduction reaction（CO2RR） to enhance the selectivity of *** analyses and computational calculations suggest that the single Cu site together with neighboring boron–imidazolate ligands provides suitably synergistic effects that enable the energetically favorable formation of an *COCHO intermediate, a key step determining selectivity. As a result, the [Cu6L4]-type cage of BIC-145 achieves a Faradaic efficiency of 28% for C2H4maintaining an average current density of -3.54 mA cm-2over a 5-hour electrolysis period. This work represents the first example for studying single-metal site catalysts with ultra-low coordination numbers through the rational design of metal–organic cages.

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ERα increases global DNA methylation and suppresses the drug response of breast cancer cells through direct up-regulation of DNMT1 and DNMT3b

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ERα increases global DNA methylation and suppresses the dru...