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Hierarchical inhibition of mTORC1 by glucose starvation-triggered AXIN lysosomal translocation and by AMPK

Life Metabolism 2023年第3期2卷 19-32页

作者： Mengqi Li xiaoyan wei Jinye Xiong Jin-wei Feng Chen-Song Zhang Sheng-Cai Lin State Key Laboratory of Cellular Stress Biology School of Life SciencesFaculty of Medicine and Life SciencesXiamen UniversityXiamenFujian 361102China

When glucose is replete,mammalian/mechanistic target of rapamycin complex 1(mTORC1)is active and anchored to the lysosomal surface via the two GTPases,Ras-related GTPase(RAG)and Ras homolog enriched in brain(Rheb),which are regulated by Ragulator and tuberous sclerosis complex 2(TSC2),*** glucose is low,aldolase senses low fructose-1,6-bisphosphate level and promotes the translocation of AXIN−liver kinase B1(LKB1)to the lysosomal surface,which leads to the activation of AMP-activated protein kinase(AMPK)and the inhibition of RAGs,sundering mTORC1 from the lysosome and causing its *** can also inactivate mTORC1 by phosphorylating Raptor and ***,the hierarchy of AXIN-and AMPK-mediated inhibition of mTORC1 remains poorly ***,we show that AXIN translocation does not require AMPK expression or *** glucose starvation conditions,knockout of AXIN extended the half-life of mTORC1 inhibition from 15 to 60 min,whereas knockout of AMPK only extended it to 30 ***(constitutively active RAGB)almost entirely blocked the lysosomal dissociation and inhibition of mTORC1 under glucose starvation,but it did not inhibit AMPK,indicating that under these conditions,it is AXIN lysosomal translocation that inhibits mTORC1,and it does so via inhibition of RAGs.5-aminoimidazole-4-carboxamide ribonucleoside(AICAR),a mimetic of AMP,which activates both cytosolic AMPK and lysosomal AMPK,fully inhibited mTORC1 even when it is stably anchored to the lysosome by RAGBGTP,whereas glucose starvation mildly inhibited such anchored ***,we demonstrate that the lysosomal translocation of AXIN plays a primary role in glucose starvation-triggered inhibition of mTORC1 by inhibiting RAGs,and that AMPK activity inhibits mTORC1 through phosphorylating Raptor and TSC2,especially under severe stress.

关键词： mTORC1 glucose sensing AMPK

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基于NF-κB信号通路探讨低分子量肝素对糖尿病肾病足细胞增殖、凋亡和炎症的影响

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检验医学与临床 2024年第10期21卷 1365-1370,1376页

作者：王淮淮赵学慧王会芳魏晓岩贾军利河北北方学院附属第二医院肾内科河北张家口075000

目的基于核转录因子-κB(NF-κB)信号通路的变化探讨低分子量肝素(LMH)对糖尿病肾病足细胞增殖、凋亡和炎症的影响。方法体外培养人肾小球足细胞(HGPC),将HGPC分为对照(Con)组(以含5 mmol/L D-葡萄糖的培养基培养)、高D-葡萄糖(Glu-H)组... 详细信息

目的基于核转录因子-κB(NF-κB)信号通路的变化探讨低分子量肝素(LMH)对糖尿病肾病足细胞增殖、凋亡和炎症的影响。方法体外培养人肾小球足细胞(HGPC),将HGPC分为对照(Con)组(以含5 mmol/L D-葡萄糖的培养基培养)、高D-葡萄糖(Glu-H)组(以含30 mmol/L D-葡萄糖的培养基培养)、LMH组(以含30 mmol/L D-葡萄糖的培养基培养,并分别给予1、5、10、15、20μmol/L的LMH进行干预)、BAY11-7082组(以含30 mmol/L D-葡萄糖的培养基培养,并给予1μmol/L的BAY11-7082干预)、LMH+BAY11-7082组(以含30 mmol/L D-葡萄糖的培养基培养,并给予最适剂量LMH联合1μmol/L的BAY11-7082干预)、LMH+Prostratin组(以含30 mmol/L D-葡萄糖的培养基培养,并给予最适剂量LMH联合20μmol/L的Prostratin干预)。先用细胞计数试剂盒-8(CCK-8)将不同浓度LMH对高糖诱导的HGPC细胞活力进行检测,以筛选出最适的LMH;采用Hoechst 33258染色法检测HGPC的凋亡情况;采用5-乙炔基-2′-脱氧尿苷(EDU)法检测HGPC的增殖情况;采用酶联免疫吸附试验(ELISA)检测HGPC裂解液中肿瘤坏死因子-α(TNF-α)、白细胞介素(IL)-1β水平;采用蛋白免疫印迹法检测HGPC中NF-κBp65、磷酸化(p)-NF-κBp65、半胱氨酸天冬氨酸蛋白水解酶(Caspase-3)、细胞周期蛋白D1(Cyclin D1)的表达量。结果经1、5、10、15、20μmol/L LMH处理的HGPC细胞活力逐渐升高,选用20μmol/L作为LMH最适剂量。与Con组比较,Glu-H组细胞凋亡率升高(P<0.05),TNF-α、IL-1β水平及Caspase-3、p-NF-κBp65蛋白相对表达量升高(P<0.05),细胞增殖率及Cyclin D1蛋白相对表达量则下降(P<0.05);与Glu-H组比较,LMH组和BAY11-7082组细胞凋亡率降低(P<0.05),TNF-α、IL-1β水平及Caspase-3、p-NF-κBp65蛋白相对表达量下降(P<0.05),细胞增殖率及Cyclin D1蛋白相对表达量明显升高(P<0.05);与LMH组比较,LMH+BAY11-7082组细胞凋亡率降低(P<0.05),TNF-α、IL-1β水平及Caspase-3、p-NF-κBp65蛋白相对表达量下降(P<0.05),细胞增殖率及Cyclin D1蛋白相对表达量明显升高(P<0.05);与LMH组比较,LMH+Prostratin组细胞凋亡率升高(P<0.05),TNF-α、IL-1β水平及Caspase-3、p-NF-κBp65蛋白相对表达量升高(P<0.05),细胞增殖率及CyclinD1蛋白相对表达量明显降低(P<0.05)。结论LMH可抑制高糖诱导的糖尿病肾病足细胞凋亡和炎症反应,并促进细胞增殖,这种作用可能是通过抑制NF-κB信号通路的活化来完成的。

关键词：糖尿病肾病人肾小球足细胞高糖低分子量肝素细胞增殖炎症 NF-κB信号通路

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Production of the C/TiO_(2)composite with a high-performance electrochemical property from titanium-rich sludge via in-situ C coating

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Journal of Environmental Sciences 2024年第3期137卷 131-143页

作者： Hualong Wu Yanxia Zhao Jiexi Wang xiaoyan Li Kaimin Shih Xuguang Li wei Liu School of Water Conservancy and Environment University of JinanJinan 250022China State Key Lab of Physical Chemistry of Solid Surface Collaborative Innovation Center of Chemistry for Energy MaterialsCollege of MaterialsXiamen UniversityXiamen 361005China School of Metallurgy and Environment Central South UniversityChangsha 410083China Department of Civil Engineering The University of Hong KongPokfulamHong KongChina Institute of Environment and Ecology Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China

Resource recycling from waste-water and sludge is an important part of the 14th Five-Year Plan in *** emerging titanium-based coagulants have drawn growing attentions due to their strong coagulation capability in water purification and value-added Ti-loaded sludge *** and recovery of the high value-added sludge into functional nanomaterials is highly significant for both sludge reduction and environmental *** present study was carried out to investigate the recycle of the coagulated Ti-loaded sludge to produce functional C/TiO_(2)composites as the anode materials for lithium-ion batteries(LIBs).It is the first time that the application of the Ti-loaded wastewater sludge derived C/TiO_(2)was evaluated for *** experimental results showed that the carbon coating through in-situ carbonization of the sludge produced the C/TiO_(2)composites with a high specific surface area,stable structural integrity,and excellent electrochemical properties that would facilitate Li+diffusion in long-term LIBs *** C/TiO_(2)composites calcinated from the polytitanium sulfate-coagulated sludge at 800℃(N_(2))exhibited the best electrochemical performance during the cycling tests(601 m Ah/g at 100 m A/g after 200 cycles).The research work demonstrates the promising prospect of the recycle and value-added utilization of the Ti-loaded sludge in the production of high-performance C/TiO_(2)composites for energy storage *** study provides a new way for the management and reuse of Ti-loaded waste-sludge.

关键词： Sludge recovery Ti-loaded sludge In-situ coating Lithium-ion battery

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Design method of extractant for liquid-liquid extraction based on elements and chemical bonds

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Chinese Journal of Chemical Engineering 2024年第4期68卷 193-202页

作者： Yuwen wei Chunling Zhang Yue Zhang Lili Wang Li Xia xiaoyan Sun Shuguang Xiang Institute of Process System Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China Yantai Guobang Chemical Machinery Technology Co. Ltd.Yantai 264002China

In the petrochemical industry process, the relative volatility between the components to be separated is close to one or the azeotrope that systems are difficult to separate. Liquid-liquid extraction is a common and effective separation method, and selecting an extraction agent is the key to extraction technology research. In this paper, a design method of extractants based on elements and chemical bonds was proposed. A knowledge-based molecular design method was adopted to pre-select elements and chemical bond groups. The molecules were automatically synthesized according to specific combination rules to avoid the problem of “combination explosion” of molecules. The target properties of the extractant were set, and the extractant meeting the requirements was selected by predicting the correlation physical properties of the generated molecules. Based on the separation performance of the extractant in liquid-liquid extraction and the relative importance of each index, the fuzzy comprehensive evaluation membership function was established, the analytic hierarchy process determined the mass ratio of each index, and the consistency test results were passed. The results of case study based on quantum chemical analysis demonstrated that effective determination of extractants for the analysis of benzene-cyclohexane systems. The results unanimously prove that the method has important theoretical significance and application value.

关键词： Molecular design Element and chemical bonds Molecular simulation Thermodynamics Solvent extraction

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陕西紫阳某废弃石煤矿酸性废水的产生机理探讨

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能源与环保 2024年第3期46卷 245-250页

作者：张明祖黎卫亮王鹏魏小燕朱津蕊刘三中国地质调查局西安地质调查中心陕西西安710054

在自然环境中,黄铁矿容易发生氧化反应导致酸性矿山废水(AMD)污染,进而威胁人类的健康安全。石煤及矸石中伴生的黄铁矿及重金属(镉、镍、钒、锰、锌等)成分复杂,经大气降雨、地表水以及基岩裂隙水的长期浸泡淋溶,产生酸性水,加剧有毒有... 详细信息

在自然环境中,黄铁矿容易发生氧化反应导致酸性矿山废水(AMD)污染,进而威胁人类的健康安全。石煤及矸石中伴生的黄铁矿及重金属(镉、镍、钒、锰、锌等)成分复杂,经大气降雨、地表水以及基岩裂隙水的长期浸泡淋溶,产生酸性水,加剧有毒有害重金属元素浸出。AMD因产量大、形成时间跨度长、产源地分散等问题,成为矿山环境修复者们的最棘手问题之一。对陕西紫阳废弃石煤矿进行采样分析,掌握废渣的化学成分及矿物组成,为酸性水的产生查找根源。依据《固体废物浸出毒性浸出方法水平振荡法》(HJ 557—2010),将样品破碎后分别采用蒸馏水浸泡、曝气浸泡及密封浸泡方法,来模拟自然环境下酸性水产生过程,并在模拟过程中定期采集水样进行分析测定,为后续的矿上修复治理提供依据。

关键词：酸性矿山废水石煤黄铁矿浸泡

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Phase equilibrium data prediction and process optimizationin butadiene extraction process

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Chinese Journal of Chemical Engineering 2024年第7期71卷 1-12页

作者： Baowei Niu Yanjie Yi Yuwen wei Fuzhen Zhang Lili Wang Li Xia xiaoyan Sun Shuguang Xiang Institute of Process System Engineering College of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China

In response to the lack of reliable physical parameters in the process simulation of the butadiene extraction,a large amount of phase equilibrium data were collected in the context of the actual process of butadiene production by *** accuracy of five prediction methods,UNIFAC(UNIQUAC Functional-group Activity Coefficients),UNIFAC-LL,UNIFAC-LBY,UNIFAC-DMD and COSMO-RS,applied to the butadiene extraction process was verified using partial phase equilibrium *** results showed that the UNIFAC-DMD method had the highest accuracy in predicting phase equilibrium data for the missing ***-RS-predicted multiple systems showed good accuracy,and a large number of missing phase equilibrium data were estimated using the UNIFAC-DMD method and COSMO-RS *** predicted phase equilibrium data were checked for *** NRTL-RK(non-Random Two Liquid-Redlich-Kwong Equation of State)and UNIQUAC thermodynamic models were used to correlate the phase equilibrium *** device simulations were used to verify the accuracy of the thermodynamic model applied to the butadiene extraction *** simulation results showed that the average deviations of the simulated results using the correlated thermodynamic model from the actual values were less than 2%compared to that using the commercial simulation software,Aspen Plus and its *** average deviation was much smaller than that of the simulations using the Aspen Plus database(>10%),indicating that the obtained phase equilibrium data are highly accurate and *** best phase equilibrium data and thermodynamic model parameters for butadiene extraction are *** improves the accuracy and reliability of the design,optimization and control of the process,and provides a basis and guarantee for developing a more environmentally friendly and economical butadiene extraction process.

关键词： Butadiene extraction Phase equilibrium data Prediction methods Thermodynamic modeling Process simulation

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Pyridinic-N doping carbon layers coupled with tensile strain of FeNi alloy for activating water and urea oxidation

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Green Energy & Environment 2024年第4期9卷 684-694页

作者： Guangfu Qian wei Chen Jinli Chen Li Yong Gan Tianqi Yu Miaojing Pan xiaoyan Zhuo Shibin Yin Guangxi Key Laboratory of Electrochemical Energy Materials College of Chemistry and Chemical EngineeringState Key Laboratory of Processing for Non-Ferrous Metal and Featured MaterialsGuangxi University100 Daxue RoadNanning530004China Institute for Structure and Function and Department of Physics Chongqing UniversityChongqing400030China

Exploitation of oxygen evolution reaction(OER)and urea oxidation reaction(UOR)catalysts with high activity and stability at large current density is a major challenge for energy-saving H_(2) production in water ***,we use the pyridinic-N doping carbon layers coupled with tensile strain of FeNi alloy activated by NiFe_(2)O_(4)(FeNi/NiFe_(2)O_(4)@NC)for efficiently increasing the performance of water and urea *** to the tensile strain effect on FeNi/NiFe_(2)O_(4)@NC,it provides a favorable modulation on the electronic properties of the active center,thus enabling amazing OER(η_(100)=196 mV)and UOR(E_(10)=1.32 V)intrinsic ***,the carbon-coated layers can be used as armor to prevent FeNi alloy from being corroded by the electrolyte for enhancing the OER/UOR stability at large current density,showing high industrial *** work thus provides a simple way to prepare high-efficiency catalyst for activating water and urea oxidation.

关键词： Carbon-encapsulated Tensile strain Catalyst Oxygen evolution reaction Urea oxidation reaction

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Temperature-and Strain-Compensated Directional Curvature Sensor Based on Bragg Gratings in Three-Core Fiber with Bridged Waveguides

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中国激光 2024年第18期51卷 1-10页

作者： Wu Zhifang wei Yefen Lin Jing Wang Hupo Huang Ruimin Wang xiaoyan Pu Jixiong Fujian Key Laboratory of Light Propagation and Transformation College of Information Science and Engineering Huaqiao University

Fiber-based curvature sensors, especially those capable of discerning the direction of curvature, have attracted more and more interest due to their promising applications in structural health monitoring, high-precision measurement, medical and biological diagnosis-treat instruments, and so on. Here, we propose and demonstrate a compact directional curvature sensor that comprises two bridged waveguides and three Bragg gratings in a section of three-core fiber（TCF）. Both the waveguides and gratings are integrated by femtosecond laser micromachining method. The waveguides, connecting the TCF outer cores to the lead-in single-mode fiber core, function as beam couplers to realize simultaneous interrogation of all three gratings without any separate fan-in/out component. Owing to the spatial specificity, the outer-core gratings exhibit high and direction-dependent sensitivity to curvature, whereas the central-core grating is nearly insensitive to curvature but shows similar sensitivities to ambient temperature and axial strain as the outer-core gratings. It can be used to compensate the cross impact of temperature and strain when the outer-core gratings are applied for curvature detection. Moreover, the wavelength interval between two outer-core gratings is also proposed as an indicator for curvature sensing. It features with a much higher sensitivity to curvature and reduced sensitivities to temperature and axial strain. The corresponding maximum sensitivity to curvature is as high as 191.89 pm/m-1, while the sensitivities to temperature and strain are only 0.3 pm/℃ and 0.0218 pm/με, respectively. Therefore, our proposed device provides a compact and robust all-infiber solution for directional curvature sensing. It not only offers high sensitivity and accuracy but also immunity to temperature and axial strain fluctuations, making it a promising tool for a wide range of applications.

关键词： directional curvature sensing femtosecond laser micromachining fiber Bragg grating fiber optics waveguide integration

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How Does ESG Performance Impact Corporate Financing Costs?An Empirical Study in China

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Journal of Systems Science and Information 2024年第2期12卷 229-244页

作者： wei LI Mei MEI xiaoyan YU Jiahao WANG Tiangeng (Becky) GENG School of Economics and Management University of Chinese Academy of SciencesBeijing 100190China Institute of Medical Information&Library Chinese Academy of Medical SciencesBeijing 100005China Business and Management Royal HollowayUniversity of LondonSurrey TW200EXUK Krieger School of Arts and Sciences Johns Hopkins UniversityBaltimore MD 21218USA

In the background of the green transformation of the economy and society,the ESG performance of enterprises has been paid more and more attention in the investment ***,previous studies have inadequately explored how the ESG performance affects corporate financing *** on the information asymmetry theory,this paper analyzes the impact mechanism of ESG performance on corporate financing ***,taking 1044 A-share listed companies in2016–2020 as a sample,through the sorting and analysis of ESG report disclosure and rating data,the company’s ESG performance indicators are obtained,and an empirical model is built to test the relationship between ESG performance and corporate financing *** paper constructs a panel regression model using ESG rating data and corporate financial data and finds that in the overall sample,the higher the ESG performance,the lower the equity financing cost;The higher the ESG performance,the lower the debt financing *** addition,it also discussed the moderating effect of enterprise scale and media attention on the impact of ESG performance on enterprise financing *** empirical results show that the influence of company size on ESG performance on financing costs has a moderating effect and a positive moderating effect.

关键词： ESG performance financing cost corporate heterogeneity media attention

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Impact of ozonation on disinfection byproducts formation from phenylalanine during chlorination

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Journal of Environmental Sciences 2024年第10期144卷 199-211页

作者： Sinong Huang Hongwei Liu Kunming wei Liang Zhang xiaoyan Ma Qingsong Li Xueyan Li Andrea M.Dietrich College of Civil Engineering Zhejiang Key Laboratory of Civil Engineering Structures&Disaster Prevention and Mitigation TechnologyZhejiang University of TechnologyHangzhou 310023China Water Resources and Environmental Institute Xiamen University of TechnologyXiamen 361005China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China Civil and Environmental Engineering Virginia Polytechnic Institute and State UniversityBlackburgVA 24061USA

As a strong oxidizing agent,ozone is used in some water treatment facilities for disinfection,taste and odor control,and removal of organic ***(Phe)was used as the target amino acid to comprehensively investigate variability of disinfection byproducts(DBPs)formation during chlorine disinfection and residual chlorine conditions subsequent to *** results showed that subsequent to ozonation,the typical regulated and unregulated DBPs formation potential(DBPsFP),including trichloromethane(TCM),dichloroacetonitrile(DCAN),chloral hydrate(CH),dichloroacetic acid(DCAA),trichloroacetic acid(TCAA),and trichloroacetamide(TCAcAm)increased substantially,by 2.4,3.3,5.6,1.2,2.5,and 6.0 times,respectively,compared with only *** also significantly increased the DBPs yield under a 2 day simulated residual chlorine condition that mimicked the water distribution *** formations followed pseudo first order *** formation rates of DBPs in the first 6 hr were higher for TCM(0.214 hr^(−1)),DCAN(0.244 hr^(−1)),CH(0.105 hr^(−1)),TCAcAm(0.234 hr^(−1)),DCAA(0.375 hr^(−1))and TCAA(0.190 hr^(−1))than *** peak DBPsFP of TCM,DCAN,CH,TCAcAm,DCAA,and TCAA were obtained when that ozonation time was set at 5–15 *** times>30 min increased the mineralization of Phe and decreased the formation of DBPs upon *** bromine ion(Br^(−1))concentration increased production of bromine-DBPs and decreased chlorine-DBPs formation by 59.3%–92.2%.Higher ozone dosages and slight alkaline favored to reduce DBP formation and *** ozonation conditions should be optimized for all application purposes including DBPs reduction.

关键词： Ozone Amino acids Chlorination Disinfection by-products

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