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Dynamic modulation of innate immunity programming and memory

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Science China(life Sciences) 2016年第1期59卷 38-43页

作者： Ruoxi Yuan liwu li Department of Biological Science Pathobiology and Biomedical Sciences Virginia Tech

Recent progress harkens back to the old theme of immune memory, except this time in the area of innate immunity, to which traditional paradigm only prescribes a rudimentary first-line defense function with no memory. However, both in vitro and in vivo studies reveal that innate leukocytes may adopt distinct activation states such as priming, tolerance, and exhaustion, depending upon the history of prior challenges. The dynamic programming and potential memory of innate leukocytes may have far-reaching consequences in health and disease. This review aims to provide some salient features of innate programing and memory, patho-physiological consequences, underlying mechanisms, and current pressing issues.

关键词： innate immunity memory dynamics priming tolerance exhaustion resolving and non-resolving inflammation

Neutrophil programming dynamics and its disease relevance

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Science China(life Sciences) 2017年第11期60卷 1168-1177页

作者： Taojing Ran Shuo Geng liwu li Department of Biological Sciences Virginia Polytechnic Institute and State UniversityBlacksburg VA24061USA Guangdong Provincial Key Laboratory of Gastroenterotogy Department of GastroenterologyNanfang HospitalSouthern Medicat UniversityGuangzhou 510515China

Neutrophils are traditionally considered as first responders to infection and provide antimicrobial host defense. However, recent advances indicate that neutrophils are also critically involved in the modulation of host immune environments by dynamically adopting distinct functional states. Functionally diverse neutrophil subsets are increasingly recognized as critical components mediating host pathophysiology. Despite its emerging significance, molecular mechanisms as well as functional relevance of dynamically programmed neutrophils remain to be better defined. The increasing complexity of neutrophil functions may require integrative studies that address programming dynamics of neutrophils and their pathophysiological relevance. This review aims to provide an update on the emerging topics of neutrophil programming dynamics as well as their functional relevance in diseases.

关键词： programming dynamics immune priming inflammatory diseases

Ore Genesis of the Kalatongke Cu-Ni Sulfide Deposits, Western China: Constraints from Volatile Chemical and Carbon Isotopic Compositions

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Acta Geologica Sinica(English Edition) 2012年第3期86卷 568-578页

作者： FU Piaoer TANG Qingyan ZHANG Mmgjie ZHANG Zhaowei li liwu li Wenyuan Key Laboratory of Western China's Environmental Systems(MOE) School of Earth SciencesLanzhou UniversityLanzhou 730000China Xi'an Institute of Geology and Mineral Resources CGSXi'an 710054China Key Laboratory of Petroleum Resource Research Institute of Geology and GeophysicsCASLanzhou 730000China

The Kalatongke Cu-Ni sulfide deposits located in the East Junggar terrane, northern Xinjiang, western China are the largest magmatic sulfide deposits in the Central Asian Orogenic Belt （CAOB）. The chemical and carbon isotopic compositions of the volatiles trapped in olivine, pyroxene and sulfide mineral separates were analyzed by vacuum stepwise-heating mass spectrometry. The results show that the released volatiles are concentrated at three temperature intervals of 200-400°C, 400-900°C and 900-1200°C. The released volatiles from silicate mineral separates at 400-900°C and 900-1200°C have similar chemical and carbon isotopic compositions, which are mainly composed of H2O （av. ~92 mol%） with minor H2, CO2, H2S and SO2, and they are likely associated with the ore-forming magmatic volatiles. light δ13CCO2 values （from -20.86‰ to -12.85‰） of pyroxene indicate crustal contamination occurred prior to or synchronous with pyroxene crystallization of mantlederived ore-forming magma. The elevated contents of H2 and H2O in the olivine and pyroxene suggest a deep mantle-originated ore-forming volatile mixed with aqueous volatiles from recycled subducted slab. High contents of CO2 in the ore-forming magma volatiles led to an increase in oxygen fugacity, and thereby reduced the solubility of sulfur in the magma, then triggered sulfur saturation followed by sulfide melt segregation; CO2 contents correlated with Cu contents in the whole rocks suggest that a supercritical state of CO2 in the ore-forming magma system under high temperature and pressure conditions might play a key role in the assemblage of huge Cu and Ni elements. The volatiles released from constituent minerals of intrusion 1# have more CO2 and SO2 oxidized gases, higher CO2/CH4 and SO2/H2S ratios and lighter δ13CCO2 than those of intrusions 2# and 3#. This combination suggests that the higher oxidation state of the volatiles in intrusion 1# than intrusions 2# and 3#, which could be one of key ore-forming factors for

关键词： Ore genesis chemical composition carbon isotope volatile mafic–ultramafic intrusion Kalatongke Cu–Ni sulfide deposits Xinjiang

正构烷烃单体碳同位素组成差异分析——以塔河油田奥陶系原油为例

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沉积学报 2024年第4期42卷 1411-1421页

作者：马冬晨王文军张婷李立武王作栋钱宇敖添符印王丹贾星亮中国石化西北油田分公司实验检测技术中心乌鲁木齐830011 中国石化缝洞型油藏提高采收率重点实验室乌鲁木齐830011 中国科学院西北生态环境资源研究院甘肃省油气资源勘探与评价重点实验室兰州730000 中国科学院大学北京100049 四川轻化工大学四川自贡643000

【目的】为明确原油正构烷烃单体碳同位素(δ^(13)C_(alkane))组成差异的成因。【方法】研究分析了塔北地区奥陶系共计17个原油样品δ^(13)C_(alkane)组成特征,结合相关有机地球化学参数,从沉积环境、成熟度和生物降解作用三个方面解释... 详细信息

【目的】为明确原油正构烷烃单体碳同位素(δ^(13)C_(alkane))组成差异的成因。【方法】研究分析了塔北地区奥陶系共计17个原油样品δ^(13)C_(alkane)组成特征,结合相关有机地球化学参数,从沉积环境、成熟度和生物降解作用三个方面解释了三类原油δ^(13)C_(alkane)值的变化趋势。【结果与结论】根据物性的差异,可将塔北地区原油分为重质、中质和轻质三类。塔北地区奥陶系原油δ^(13)C_(alkane)值介于-37‰~-31‰,呈现出海相原油的特征,表明原油δ^(13)C_(alkane)组成及分布范围受其形成的沉积环境和母质类型控制;从重质原油到中质原油再到轻质原油,成熟度逐渐增大,导致原油δ^(13)C_(alkane)值正偏;相较于中质原油和轻质原油,重质原油低碳数部分δ^(13)C_(alkane)明显变大,表明生物降解程度是重质原油中、低分子量正构烷烃δ^(13)C14~δ^(13)C19值正偏的主要影响因素。

关键词：正构烷烃单体碳同位素组成生物标志化合物成熟度生物降解塔河原油

Epigallocatechin-3-gallate （EGCG） attenuates nflammation in MRL/Ipr mouse mesangial cells

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Cellular & Molecular Immunology 2010年第2期7卷 123-132页

作者： Abigail Peairs Rujuan Dai Lu Gan Samuel Shimp M Nichole Rylander liwu li Christopher M Reilly Virginia College of Osteopathic Medicine Blacksburg VA USA Department of Biomedical Sciences and Pathobiology Virginia Maryland Regional College of VeterinaryMedicine Virginia Polytechnic Institute and State University Blacksburg VA USA Department of Biological Sciences Virginia Polytechnic Institute and State UniversityBlacksburg VA USA Department of Mechanical Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA

Epigallocatechin-3-gallate （EGCG）, a bioactive component of green tea, has been reported to exert anti-inflammatory effects on immune cells. EGCG is also shown to activate the metabolic regulator, adenosine 5＇-monophosphate-activated protein kinase （AMPK）. Reports have also indicated that EGCG inhibits the immune-stimulated phosphoinositide 3-kinase （PI3K）/Akt/mammalian target of rapamycin （mTOR） pathway. The PI3K/Akt/mTOR pathway has been implicated in mesangial cell activation in lupus. Mesangial cells from MRUIpr lupus-like mice are hyper-responsive to immune stimulation and overproduce nitric oxide （NO） and other inflammatory mediators when stimulated. In our current studies, we sought to determine the mechanism by which EGCG attenuates immune-induced expression of pro-inflammatory mediators. Cultured mesangial cells from MRL/Ipr mice were pre-treated with various concentrations of EGCG and stimulated with lipopolysaccharide （LPS）/interferon （IFN）-γ. EGCG activated AMPK and blocked LPS/ IFN-γ-induced inflammatory mediator production （iNOS expression, supernatant NO and interleukin-6）. Interestingly, EGCG attenuated inflammation during AMPK inhibition indicating that the anti-inflammatory effect of EGCG may be partially independent of AMPK activation. Furthermore, we found that EGCG effectively inhibited the immune-stimulated PI3K/Akt/mTOR pathway independently of AMPK, by decreasing phosphorylation of Akt, suggesting an alternate mechanism for EGCG-mediated anti-inflammatory action in mesangial cells. Taken together, these studies show that EGCG attenuated inflammation in MRL/Ipr mouse mesangial cells via the PI3K/Akt/mTOR pathway. Our findings suggest a potential therapeutic role for the use of EGCG to regulate inflammation and control autoimmune disease.

关键词： AMPK inflammation lupus metabolism MRL/Ipr

An isotope study of the accumulation mechanisms of high-sulfur gas from the Sichuan Basin, southwestern China

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Science China Earth Sciences 2016年第11期59卷 2142-2154页

作者： liU WenHui Tenger ZHANG ZhongNing LUO HouYong ZHANG DianWei WANG Jie li liwu GAO Bo LU LongFei ZHAO Heng Sinopec Petroleum Exploration & Production Research Institute Beijing 100083 China Key Laboratory of Petroleum Accumulation Mechanisms SINOPEC Wuxi 214151 China Wuxi Research Institute of Petroleum Geology Sinopec Petroleum Exploration & Production Research Institute Wuxi 214151 China Lanzhou Center for Oil and Gas Resources Institute of Geology and Geophysics Chinese Academy of Sciences Lanzhou 730000 China

The mechanism of hydrogen sulfide(H_2S) generation plays a key role in the exploration and development of marine high-sulfur natural gas, of which the major targets are the composition and isotope characteristics of sulfur-containing *** source rocks, reservoir rocks, natural gases and water-soluble gases from Sichuan Basin have been analyzed with an online method for the content of H_2S and isotopic composition of different sulfur-containing compounds. The results of comparative analysis show that the sulfur-containing compounds in the source rocks are mainly formed by bacterial sulfate reduction(BSR), and the sulfur compounds in natural gas, water and reservoir are mainly formed by thermal sulfate reduction(TSR). Moreover, it has been shown that the isotopically reversion for methane and ethane in high sulfur content gas is caused by TSR. The sulfur isotopic composition of H_2S in natural gas is inherited from the gypsum or brine of the same or adjacent layer,indicating that the generation and accumulation of H_2S have the characteristics of either a self-generated source or a near-source.

关键词： H_2S TSR Sulfur-containing natural gas Sulfur isotope Hydrocarbon accumulation mechanism Sichuan Basin

Theoretical Analysis of the Buckling Behaviors of Inhomogeneous Shape Memory Polymer Composite Laminates Considering Prestrains

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Acta Mechanica Solida Sinica 2024年第2期37卷 271-284页

作者： Hanxing Zhao Pengyu Cao Fengfeng li Xin Lan liwu liu Yanju liu Jinsong Leng Centre of Composite Materials and Structures Harbin Institute of Technology(HIT)Harbin150080China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)Harbin150001China

The mismatch in thermal expansion coefficients between the fiber-rich and resin-rich regions of a shape memory polymer composite(SMPC)laminate,along with the residual strain during SMPC fabrication,results in buckling deformation of the inhomogeneous *** paper presents a macroscopic model for buckling of an inhomogeneous SMPC laminate under initial biaxial *** linear and nonlinear buckling analyses are carried out using the energy *** influences of prestrain biaxiality,temperature,and ply angle on the buckling wavelength,critical buckling prestrain,and buckling amplitude are *** results demonstrate that the critical buckling wavelength of the SMPC laminate is independent of the prestrain,while the amplitude is almost independent of *** addition,the optimal fiber stacking configuration with the maximum critical buckling prestrains of inhomogeneous SMPC laminates is determined by a genetic algorithm.

关键词： Shape memory polymer composite Buckling behavior Inhomogeneous laminate Biaxial prestrains

Development of an Agrobacterium-mediated CRISPR/Cas9 gene editing system in jute(Corchorus capsularis)

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The Crop Journal 2024年第4期12卷 1266-1270页

作者： Shaolian Jiang Qin li Xiangxue Meng Mengxin Huang Jiayu Yao Chuanyu Wang Pingping Fang Aifen Tao Jiantang Xu Jianmin Qi Shuangxia Jin liwu Zhang Key Laboratory of Ministry of Education for Genetic Breeding and Multiple Utilization of Crops Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina Experiment Station of Ministry of Agriculture and Rural Affairs for Jute and Kenaf in Southeast China/Fujian Public Platform for Germplasm Resources of Bast Fiber Crops/Fujian Provincial Key Laboratory of Crop Breeding by Design/Key Laboratory of Ministry of Agriculture and Rural Affairs for Biological Breeding of Fujian and Taiwan Crops Fujian Agriculture and Forestry UniversityFuzhou 350002FujianChina National Key Lab of Crop Genetic Improvement Huazhong Agricultural UniversityWuhan 430070HubeiChina

Jute(Corchorus capsularis L.)is the second most important natural plant fiber source after ***,developing an efficient gene editing system for jute remains a *** this study,the transgenic hairy root system mediated by Agrobacterium rhizogenes strain K599 was developed for Meifeng 4,an elite jute variety widely cultivated in *** transgenic hairy root system for jute was verified by subcellular localization and bimolecular fluorescence complementation(BiFC)*** CHLOROPLASTOS ALTERADOS 1(CcCLA1)gene,which is involved in the development of chloroplasts,was targeted for editing at two sites in Meifeng *** on this hairy root transformation,the gRNA scaffold was placed under the control of cotton ubiquitin GhU6.7 and-GhU6.9 promoters,respectively,to assess the efficiency of gene *** indicated the 50.0%(GhU6.7)and 38.5%(GhU6.9)editing events in the target 2 alleles(gRNA2),but no mutation was detected in the target 1 allele(gRNA1)in transgenic-positive hairy ***1 gene editing at gRNA2 under the control of GhU6.7 in Meifeng 4 was also carried out by Agrobacterium tumefaciens-mediated *** CcCLA1 mutants were albinic,with a gene editing efficiency of 5.3%.These findings confirm that the CRISPR/Cas9 system,incorporating promoter GhU6.7,can be used as a gene editing tool for jute.

关键词： Jute Agrobacterium-mediated transformation Genome editing Hairy root system

Development of new method of δ13C measurement for trace hydrocarbons in natural gas using solid phase micro-extraction coupled to gas chromatography isotope ratio mass spectrometry

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Development of new method of δ13C measurement for trace hyd...