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Inhibitory effects of berberine on ion channels of rat hepatocytes

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World Journal of Gastroenterology 2004年第19期10卷 2842-2845页

作者： FangWang Hong-YiZhou GangZhao Li-YingFu LanCheng Jian-GuoChen wei-xingyao DepartmentofPharmacology TongjiMedicalCollegeofHuazhongUniversityofScienceandTechnologyWuhan430030HubeiProvinceChina PancreaticSurgeryCenter UnionHospitalTongjiMedicalCollegeofHuazhongUniversityofScienceandTechnologyWuhan430022HubeiProvinceChina

AIM: To examine the effects of berberine, an isoquinoline alkaloid with a long history used as a tonic remedy for liver and heart, on ion channels of isolated rat ***: Tight-seal whole-cell patch-clamp techniques were performed to investigate the effects of berberine on the delayed outward potassium currents (Ik), inward rectifier potassium currents (Ik1) and Ca^2+ release-activated Ca^+ currents (ICRAC) in enzymatically isolated rat ***: Berbenne 1-300 μmol/L reduced/K in a concentration-dependent manner with EC50 of 38.86=1=5.37 μmol/L and nH of 0.82±0.05 (n = 8). When the bath solution was changed to tetraethylammonium (TEA) 8 retool/L,IK was *** 30 μmol/L reduced/K at all examined membranepote ntials, especially at potentials positive to +60 mV (n = 8,P<0.05 or P<0.01 vs control). Berberine had mild inhibitory effects on IK1 in rat hepatocytes. Berberine 1-300 μmol/L also inhibited ICRAC in a concentration-dependent fashion. The fitting parameters were EC50 = 47.20±10.86 μmol/L,nH= 0.71±0.09 (n = 8). The peak value of/CRAC in the I-Vrelationship was decreased by berberine 30 μmol/L at potentialnegative to -80 mV (n = 8, P<0.05 vscontrol). But the reverse potential of/CRAC occurred at voltage 0 mV in all ***: Berberine has inhibitory effects on potassium and calcium currents in isolated rat hepatocytes, which may be involved in hepatoprotection.

关键词：抑制作用黄连素离子通路老鼠肝细胞钾离子

Electrophysiological effects of anthopleurin-Q on rat hepatocytes

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World Journal of Gastroenterology 2004年第1期10卷 96-99页

作者： Hong-YiZhou FangWang Ke-QiangZhang LanCheng JiZhou Li-YingFu wei-xingyao DepartmentofPharmacology TongjiMedicalCollegeofHuazhongUniversityofScienceandTechnologyWuhan430030HubeiProvinceChina DepartmentofInfectiousDiseases JianghanOilFieldCentralHospitalQianjiang433124HubeiProvinceChina

AIM: To study the effects of AP-Q on CCl4-induced acute liver injury, delayed outward potassium current (Iκ), inward rectifier potassium current (Iκ1) and calcium release-activated calcium current (ICRAC) in isolated rat hepatocytes. METHODS: A single dose of CCl4 (10 μg/mL, ip) was injected to induce acute liver injury in rats. Serum aminotransferase activities were determined. Whole cell patch-clamp techniques were used to investigate the effects of AP-Q on delayed outward potassium current (Iκ), inward rectifier potassium current (IKI) and calcium release-activated calcium current (ICRAC). RESULTS: AP-Q (3.5 and 7 μg/kg) pretreatment significantly reduced ALT and AST activities. AP-Q 0.1-100 nM produced a concentration-dependent increase of Iκ with EC50 value of 5.55±1.8 nM (n=6). AP-Q 30 nM shifted the I-V curve of Iκ leftward and upward. CCl4 4 mM decreased Iκ current 28.6±0.5% at 140 mV. After exposure to CCl4 for 5 rain, AP-Q 30 nM attenuated the decrease of Iκ induced by CCl4 close to normal amplitude. AP-Q 0.01-100 nM had no significant effect on either inward or outward components of Iκ1 at any membrane potential examined. AP-Q 0.1-100 nM had no significant influence on the peak amplitude of ICRAC, either,and did not affect the shape of its current voltage curve. CONCLUSION: AP-Q has a protective effect on CCl4-induced liver injury, probably through selectively increased Iκ in hepatocytes.

关键词：海葵素-Q 肝实质细胞电生理学动物实验肝功能生物化学

Manufacturing process of water-soluble salt-based ceramic cores based on vat photopolymerization

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Journal of Advanced Ceramics 2024年第5期13卷 652-665页

作者： Yuzhen Zhang Wenyan Duan Yue Gu xingyao Sun Shan Li Bingshan Liu Gong Wang Key Laboratory of Space Manufacturing Technology(SMT) Technology and Engineering Center for Space UtilizationChinese Academy of SciencesBeijing 100094China University of Chinese Academy of Sciences Beijing 100049China Ministry of Education Key Laboratory for Cross-Scale Micro and Nano Manufacturing Changchun University of Science and TechnologyChangchun 130022China

Water-soluble salt-based ceramic cores can be recycled and have excellent high-temperature chemical *** this work,vat photopolymerization was successfully applied to water-soluble salt-based ceramic cores for the first *** powder raw materials of the printing suspension were sodium chloride and ***-precision green bodies were manufactured by optimizing suspensions and *** addition,the postprocessing method was optimized according to the microstructure and mechanical *** sintered part had a high bending strength and smooth ***,the dissolution rate and moisture resistance were compared under different dissolution and storage *** to traditional manufacturing methods,vat photopolymerization enables the production of complex structures without molds and reduces production *** technology is suitable for the rapid iteration of complex structural parts and can be applied to precision parts in aerospace,military,and other technical fields with high cost-effectiveness and sustainability.

关键词： vat photopolymerization water-soluble salt-based ceramic cores defect formation control accuracy moisture rate

聚醚桥连二异羟肟酸的合成及其双核钴(Ⅱ)配合物的氧加合性能

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化学学报 2002年第5期60卷 886-891页

作者：李鸿波杜瑛曾伟魏星耀秦圣英四川大学化学学院成都610064

合成了一系列由聚醚桥连的N ,N′ 二苯基二异羟肟酸L1H2 ～L6H2 及其双核钴 (Ⅱ )配合物Co2 L12 ～Co2 L62 ,并以元素分析 ,IR ,1HNMR和MS进行了表征 .在不同温度下 ,测定了双核钴 (Ⅱ )配合物的氧合常数和热力学参数ΔH0 ,ΔS0 ,并与... 详细信息

合成了一系列由聚醚桥连的N ,N′ 二苯基二异羟肟酸L1H2 ～L6H2 及其双核钴 (Ⅱ )配合物Co2 L12 ～Co2 L62 ,并以元素分析 ,IR ,1HNMR和MS进行了表征 .在不同温度下 ,测定了双核钴 (Ⅱ )配合物的氧合常数和热力学参数ΔH0 ,ΔS0 ,并与多亚甲基或苯基桥连的类似物Co2 L72 和Co2 L82 比较 ,讨论了桥链长度、刚柔性、氧杂原子及其构筑的冠环和添加碱 (或碱土 )

关键词：聚醚桥连二异羟肟酸氧加合性能 N,N′-二苯基二异羟肟酸双核钴(Ⅱ)配合物合成氧合反应

Microenvironment responsive pod-structured astaxanthin nanocarrier for ameliorating inflammatory bowel disease

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Chinese Chemical Letters 2024年第7期35卷 360-366页

作者： Jingting Wang Yuanyuan Chen Linlin Han Shasha Xia xingyao Zhang Peng Xue Yuejun Kang Jian Ming Zhigang Xu Key Laboratory of Luminescence Analysis and Molecular Sensing Ministry of EducationSchool of Materials and Energy&Chongqing Engineering Research Center for Micro-Nano Biomedical Materials and DevicesSouthwest UniversityChongqing 400715China College of Food Science Southwest UniversityChongqing 400715China State Key Laboratory of Chemo/Biosensing and Chemometrics Hunan UniversityChangsha 410082China

Anti-inflammatory drugs targeting inflammatory bowel disease(IBD)have attracted considerable attention but still face low therapeutic outcomes and frequent side ***(ATX),a natural ketone,possesses potent antioxidant and anti-inflammatory ***,it faces problems such as poor water solubility,photothermal instability,and low ***,we employed a supramolecular encapsulation strategy to create a nanoscale oral delivery system for ATX(referred to as FC-ATX NPs)by coupling fucoidan(FUC)with chitosan oligosaccharides(COS).The obtained FC-ATX NPs exhibited a particular“bean pod”structure with uniform size,good encapsulation efficiency,excellent physical and chemical stability,pH-triggered intestinal targeted slow-release properties,and potent antioxidant *** vitro cell culture experiments showed that FC-ATX NPs promoted cellular uptake and scavenged excessive intracellular reactive oxygen species(ROS).In mouse models of colitis,FC-ATX NPs enhanced the drug absorption of intestinal epithelial cells and effectively accumulated at the site of *** work provides an efficient approach to enhance the bioavailability of ATX and has excellent application potential as an oral targeted delivery system for colitis therapy.

关键词： Oral administration Astaxanthin Nanocarrier Anti-oxidant activity Colon targeting

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基于修正褶积模型的地震反演方法

物探化探计算技术 2017年第2期39卷 224-230页

作者：邓炜印兴耀宗兆云中国石油大学(华东)地球科学与技术学院青岛266580

在地震反演中,地震信号可以认为反射系数与地震子波的褶积,在此过程地震子波振幅保持不变。这里提出一种修正的褶积模型,将透射损失融入褶积过程中,表现为子波振幅的衰减,对于砂泥岩互层介质,修正褶积模型更加真实地刻画地震信号形成过... 详细信息

在地震反演中,地震信号可以认为反射系数与地震子波的褶积,在此过程地震子波振幅保持不变。这里提出一种修正的褶积模型,将透射损失融入褶积过程中,表现为子波振幅的衰减,对于砂泥岩互层介质,修正褶积模型更加真实地刻画地震信号形成过程。基于修正褶积模型建立新的反演目标函数,反演得到的反射系数消除了透射损失的影响。与基于常规褶积反演得到的反射系数相比较,此方法保证了更多有效信息的体现。实际资料应用表明,基于修正褶积模型的地震反演方法提高了反演结果的合理性。

关键词：地震反演修正褶积透射损失

A low-frequency and broadband wave-insulating vibration isolator based on plate-shaped metastructures

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Applied Mathematics and Mechanics(English Edition) 2024年第7期45卷 1171-1188页

作者： wei wei Feng GUAN Xin FANG College of Intelligent Science National University of Defense TechnologyChangsha410073China Naval Research Academy Beijing100161China

A metamaterial vibration isolator,termed as wave-insulating isolator,is proposed,which preserves enough load-bearing capability and offers ultra-low and broad bandgaps for greatly enhanced wave *** consists of plate-shaped metacells,whose symmetric and antisymmetric local resonant modes offer several low and broad mode bandgaps although the complete bandgap remains high and *** bandgap mechanisms,vibration isolation properties,effects of key parameters,and robustness to complex conditions are *** experimentally demonstrated,the wave-insulating isolator can improve the vibration insulation in the ranges of[50 Hz,180 Hz]and[260 Hz,400 Hz]by 15 dB and 25 dB,respectively,in contrast to the conventional isolator with the same first resonant frequency.

关键词： metamaterial and metastructure vibration isolation bandgap wave insulation plate

Planet wind: Planetary evolution dominated by electromagnetic forces

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Science China Earth Sciences 2024年第10期67卷 3331-3336页

作者： Yong wei 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

1. Introduction Over the five centuries since Copernicus, the focus of planetary science has transitioned from the visible realm to the invisible. In the more than 60 years following the advent of the space age, our a... 详细信息

关键词： evolution dominated planetary

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The lithology and composition of lunar mantle modified by ilmenite bearing cumulate:A thermodynamic model

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Acta Geochimica 2024年第5期43卷 856-875页

作者： wei Huang wei Du State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China University of Chinese Academy of Sciences Beijing 100049China Center for Excellence in Comparative Planetology Chinese Academy of SciencesHefei 230026China

Due to their high density,the ilmenite-bearing cumulates(IBC)(with or without KREEP)formed during the late-stage lunar magma ocean solidification are thought to sink into the underlying lunar mantle and trigger lunar mantle *** evidence implied that IBC may descend deep inside the Moon and remain as a partially molten layer at the core-mantle boundary(CMB).However,partial melting may have occurred on the mixed mantle cumulates during the sinking of IBC/KREEP and the silicate melt may be positively buoyant,thus preventing the IBC/KREEP layer from sinking to the ***,we perform thermodynamic simulation on the stability of lunar mantle cumulates at different depths mixed with different amounts of IBC/KREEP from an updated LMO *** modeling results suggest that the sinking of IBC/KREEP will cause at least 5 wt%partial melting in the shallow(~120 km)and a much larger degree of partial melting in the deep lunar mantle(~420 km).Due to the density contrast with the surrounding mantle,IBC/KREEP-bearing melts could potentially decouple under certain *** modified lunar mantle by sinking of IBC/KREEP can better explain the formation of different kinds of lunar basaltic magma than the primary lunar mantle formed through differentiation of lunar magma *** of IBC/KREEP back into the lunar mantle may introduce plagioclase,clinopyroxene,garnet,and incompatible radioactive elements into the deep lunar mantle,which will further affect the thermal and chemical evolution of the lunar interior.

关键词： Ilmenite-bearing cumulate KREEP Partial melting Lunar mantle overturn pMELTS