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Heterozygous lipoprotein lipase knockout mice exhibit impaired hematopoietic stem/progenitor cell compartment

Animal Models and Experimental Medicine 2021年第4期4卷 418-425页

作者： Guiying Shi Xinyue li keya Li Yiying Huang Xuepei Lei lin Bai Chuan Qin The Institute of Laboratory Animal Sciences CAMS&PUMCBeijing Engineering Research Center for Experimental Animal Models of Human Critical DiseasesBeijingP.R.China

Background : Hematopoietic stem cells (HSC) maintain the hematopoietic system homeostasis through self- renewal and multilineage differentiation potential. HSC are regulated by the microenvironment, cytokine signaling, and transcription factors. Recent results have shown that lipid pathways play a key role in the regulation of HSC quiescence, proliferation, and division. However, the mechanism by which lipid metabolism regulates HSC proliferation and differentiation remains to be clarified. lipoprotein lipase (LPL) is an essential enzyme in the anabolism and catabolism of very low- density lipoprotein, chylomicrons, and triglyceride- rich lipoproteins. Methods : The percentage of hematopoietic stem/progenitor cells and immune cells were determined by fluorescence- activated cell sorting (FACS). The function and the mechanism of HSCs were analyzed by cell colony forming assay and qPCR analysis. The changes in LPL^(+/−) HSC microenvironment were detected by transplantation as- says using red fluorescent protein (RFP) transgenic mice. Results : To explore the function of LPL in HSC regulation, heterozygous LPL- knockout mice (LPL^(+/−)) were established and analyzed by FACS. LPL^(+/−) mice displayed decreased hematopoietic stem/progenitor cell compartments. In vitro single- cell clono- genic assays and cell-cycle assays using FACS promoted the cell cycle and increased proliferation ability. qPCR analysis showed the expression of p57^(KIP2) and p21^(WAF1)/ ^(CIP1) in LPL^(+/−) mice was upregulated. Conclusions : LPL^(+/−) mice exhibited HSC compartment impairment due to promotion of HSC proliferation, without any effects on the bone marrow (BM) microenvironment.

关键词： cell cycle HSCs LPL

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Effectiveness and mechanisms of adiposederived stem cell therapy in animal models of Parkinson’s disease:a systematic review and meta-analysis

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Translational Neurodegeneration 2021年第2期10卷 166-177页

作者： keya Li Xinyue li Guiying Shi Xuepei Lei Yiying Huang lin Bai Chuan Qin NHC Key Laboratory of Human Disease Comparative Medicine Beijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious DiseasesInstitute of Laboratory Animal ScienceChinese Academy of Medical Sciences and Comparative Medicine CenterPeking Union Medical CollegeBeijing 100021China

Animal models provide an opportunity to assess the optimal treatment way and the underlying mechanisms of direct clinical application of adipose-derived stem cells(ADSCs).Previous studies have evaluated the effects of primitive and induced ADSCs in animal models of Parkinson’s disease(PD).Here,eight databases were systematically searched for studies on the effects and in vivo changes caused by ADSC intervention.Quality assessment was conducted using a 10-item risk of bias tool.For the subsequent meta-analysis,study characteristics were extracted and effect sizes were computed.Ten out of 2324 published articles(n=169 animals)were selected for further meta-analysis.After ADSC therapy,the rotation behavior(10 experiments,n=156 animals)and rotarod performance(3 experiments,n=54 animals)were improved(Plication in clinical practice.

关键词： Parkinson’s disease Adipose-derived stem cells Animal model Stem cell therapy Meta-analysis Neurogenesis Neuroprotection

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Effectiveness and mechanisms of adipose-derived stem cell therapy in animal models of Parkinson's disease:a systematic review and meta-analysis

Effectiveness and mechanisms of adipose-derived stem cell th...

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第十六届中国实验动物科学年会

作者： keya Li Xinyue li Guiying Shi Xuepei Lei Yiying Huang lin Bai Chuan Qin Key Laboratory of Human Disease Comparative Medicine Chinese Ministry of HealthBeijing Key Laboratory for Animal Models of Emerging and Reemerging Infectious DiseasesInstitute of Laboratory Animal ScienceChinese Academy of Medical Sciencesand Comparative Medicine CenterPeking Union Medical College

Animal models provide an opportunity to assess the optimal treatment way and the underlying mechanisms of direct clinical application of adipose-derived stem cells(ADSCs).Previous studies have evaluated the effects of primitive and induced ADSCs in animal models of Parkinson’s disease(PD).Here,eight databases were systematically searched for studies on the effects and in vivo changes caused by ADSC intervention.Quality assessment was conducted using a 10-item risk of bias tool.For thesubsequent meta-analysis,study characteristics were extracted and effect sizes were computed.Ten outof 2,324 published articles(n=169 animals)were selected for further meta-analysis.After ADSC therapy,the rotation behavior(10 experiments,n=156 animals) and rotarod performance(3 experiments,n=54 animals) were improved(P lication in clinical practice.

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Spatiotemporal dynamics of the microbial diversity on salt-preserved goatskins assessed by culturing and 16S rRNA gene amplicon sequencing

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Journal of Leather Science and Engineering 2022年第1期4卷 440-451页

作者： Xiaoguang li keya Sen Yuqin Zhang Yongqiang Tian Bi Shi Author details 1 Key Laboratory of Leather Chemistry and Engineering Ministry of Education and College of Biomass Science and EngineeringSichuan UniversityChengdu 610065People’s Republic of China Division of Biological Sciences STEMUniversity of WashingtonBothellWA 98011USA Institute of Medicinal Biotechnology Chinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100050People’s Republic of China

Wet-salted skin,as a special artificial high-salt environment,is rich in protein,fat,collagen and other nutrient substrates,and is a rich resource of halotolerant and halophilic microorganisms.However,knowledge gaps regarding the microbial community structure and inter taxa associations of wet-salted skin are large.In this study,the spatiotemporal dynamics and community structure of microorganisms present on wet-salted goatskins were investigated using 16S rRNA gene amplicon sequencing and culturable technique.Alpha diversity analysis based on Sobs,Chao,Ace and Shannon indices revealed that microbial diversity on the wet-salted goatskins exhibited a trend of‘down→up→down→flat’with time.During preservation,genera belonging to the bacteria domain such as Aci-netobacter,Weissella and Streptococcus were slowly dying out,whereas those belonging to halophilic archaea such as Natrialba and Haloterrigena were gradually flourishing.Moreover,to resist high-salt stress,microorganisms on the wet-salted goatskin gradually migrated from the outside to the inside,eventually leading to the microbial diversity inside the skin being the same as or even higher than that on the skin surface.Venn diagram analysis revealed that the strains of some genera,including Psychrobacter,Salimicrobium,Salinicola,Ornithinibacillus,Halomonas,Bacillus and Chromohalobacter,were distributed throughout the interior and exterior of the wet-salted goatskin and existed during various periods.Accordingly,45 protease-producing halophilic or halotolerant microorganisms were isolated and screened from the wet-salted goatskin using the gradient dilution plate method.Importantly,16S rRNA genes of some bacteria exhibited less than 99.5%similarity to valid published species,indicating that they likely are novel spe-cies and have a good potential for application.

关键词： Wet-salted skin Spatiotemporal dynamics Community structure 16S rRNA gene amplicon sequencing

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Water bridges are essential to neonicotinoids: Insights from synthesis,bioassay and molecular modelling studies

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Chinese Chemical Letters 2019年第1期30卷 255-258页

作者： Chengchun Zhu Guanglong li keya Xiao Xusheng Shao Jiagao Cheng Zhong li Shanghai Key Laboratory of Chemical Biology School of Pharmacy East China University of Science and Technology Shanghai Collaborative Innovation Center for Biomanufacturing Technology

Water-bridged H-bonds have been observed in many cases of ligand-receptor recognitions. To explore the roles of water bridges in the binding of neonicotinoids with receptors, twenty-four neonicotinoid compounds with nine fragments, including 1 H-1,2,3-triazole, CN, COOMe, CONHNH_2, CONHMe, NO_2,NH_2, NHCOMe and NHCSNH_2 were synthesized and evaluated, of which, compounds with cyano group showed the best activities against Aphis craccivora. Accordingly, the cyano group is the optimal fragment mimicking the water bridge. Two cyano-substituted cis-nitromethylene compounds display good insecticidal activities, whereas the LC_(50) values are lower than those of their corresponding prototypes.Docking study showed that the cyano group acts only as H-bond acceptor, while the water bridge can act as both donor and acceptor. It revealed that the water bridge might be stable in the active site and was not suitable to be replaced by other groups. The findings illustrated that the water bridge is necessary for high insecticidal activities of neonicotinoids, which should be also helpful in better understanding the binding mode of neonicotinoids.

关键词： Neonicotinoids Water bridge Insecticidal activity Cyano group Molecular design

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Study of Ce-modified antibacterial 316L stainless steel

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China Foundry 2012年第4期9卷 307-312页

作者： Yuan Junping li Wei Shen keya Material Science and Engineering Department Jinan University Guangzhou 510632 China Jewelry Institute of Guangzhou Panyu Polytechnic Guangzhou 511483 China

316L stainless steel is widely used for fashion jewelry, but it can carry a large number of bacteria and bring the risk of infection since the steel has no antimicrobial performance. In this paper, the effects of Ce on the antibacterial property, corrosion resistance and processability of 316L were studied by microscopic observation, thin- film adhering quantitative bacteriostasis, and electrochemical and mechanical tests. The results show that a trace of Ce can distribute uniformly in the matrix of 316L and slightly improve its corrosion resistance in artificial sweat. With an increase in Ce content, the Ce is prone to form clustering, which degrades the corrosion resistance and the processability. The Ce-containing 316L exhibits Hormesis effect against S. aureus. A small Ce addition stimulates the growth of S. aureus. As the Ce content increases, the modified 316L exhibits an improved antibacterial efficacy. The more Ce is added, the better antibacterial capability is achieved. Overall, if the 316L is modified with Ce alone, it is difficult to obtain the optimal combination of corrosion resistance, antibacterial performance and processability. In spite of that, 0.15 wt.%-0.20 wt.% Ce around is inferred to be the best trade-off.

关键词：金属材料不锈钢钢材组织结构

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乌梅丸通过调控NLRP3炎症小体改善溃疡性结肠炎大鼠肠黏膜炎症反应及细胞焦亡

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中国免疫学杂志 2024年第1期40卷 97-102,109页

作者：李克亚王真权王军文湖南中医药大学第二附属医院肛肠科长沙410005 湖南中医药大学国际教育学院长沙410208

目的:研究乌梅丸通过调控NOD样受体热蛋白结构域3(NLRP3)炎症小体改善溃疡性结肠炎(UC)大鼠肠黏膜炎症反应及细胞焦亡的作用及机制。方法:选择雄性SD大鼠进行动物实验,采用2,4,6-三硝基苯磺酸灌肠的方式建立UC模型,造模后给予不同剂量... 详细信息

目的:研究乌梅丸通过调控NOD样受体热蛋白结构域3(NLRP3)炎症小体改善溃疡性结肠炎(UC)大鼠肠黏膜炎症反应及细胞焦亡的作用及机制。方法:选择雄性SD大鼠进行动物实验,采用2,4,6-三硝基苯磺酸灌肠的方式建立UC模型,造模后给予不同剂量乌梅丸灌胃,阴性对照(NC)-慢病毒(LV)或NLRP3-LV尾静脉注射。评价各组大鼠疾病活动指数(DAI),测量结肠长度,检测病理改变及组织病理评分、结肠组织IL-1β、IL-18含量及GSDMD-N、NLRP3、Cleaved caspase-1表达。结果:UC组大鼠结肠黏膜出现典型UC病理改变,DAI、组织病理评分、结肠组织IL-1β、IL-18含量及GSDMD-N、NLRP3、Cleaved caspase-1表达高于对照组,结肠长度短于对照组(P<0.05);不同浓度乌梅丸组大鼠结肠黏膜UC病理改变改善,DAI、组织病理评分、结肠组织IL-1β、IL-18含量及GSDMD-N、NLRP3、Cleaved caspase-1表达低于UC组,结肠长度长于UC组(P<0.05);高剂量乌梅丸灌胃同时注射LV,NLRP3-LV+UC+高剂量乌梅丸组大鼠结肠黏膜UC病理改变加重,DAI、组织病理评分、结肠组织IL-1β、IL-18含量及GSDMD-N、NLRP3、Cleaved caspase-1表达高于NC-LV+UC+高剂量乌梅丸组,结肠长度短于NC-LV+UC+高剂量乌梅丸组(P<0.05)。结论:乌梅丸通过抑制NLRP3炎症小体改善UC大鼠肠黏膜炎症反应及细胞焦亡。

关键词：溃疡性结肠炎乌梅丸 NLRP3炎症小体炎症反应细胞焦亡

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Fuzzy-Inverse-Model-Based Networked Tracking Control Frameworks of Time-Varying Signals

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IEEE/CAA Journal of Automatica Sinica 2024年第7期11卷 1708-1710页

作者： Shiwen Tong Dianwei Qian keya Yuan Dexin liu Yuan li Jiancheng Zhang the College of Robotics Beijing Union University the School of Control and Computer Engineering North China Electric Power University

Dear Editor,Tracking control in networked environment is a very challenging problem due to the contradiction of rapid response to the time-varying signal and the inevitable delay introduced by networks. This letter has proposed several fuzzy-inverse-model-based network tracking control frameworks which are helpful in handling the system with nonlinear dynamics and uncertainties.

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Performance of Composite Cements in the Repair of Porcine Thoracolumbar Burst fracture in Vitro

Performance of Composite Cements in the Repair of Porcine Th...

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中国材料大会2012

作者： Kezheng Mao keya Mao Zishen Cheng Peng li Zonggang Chen Xumei Wang Fuzhai Cui General Hospital of People's liberation Army National Glyco-engineering Research Center Shandong University Department of Materials Science and Engineering Tsinghua University

ISBN: (纸本)9783037856079;3037856076

An ideal injectable bone cement should be able to fill fully the fractures gap and provide good mechanical support. In the present work, the mineralized collagen and calcium sulphate dehydrate （CSD） was incorporated into α-calcium sulphate hemihydrates （α-CSH） to explore an injectable composite cement. The injectability, the setting time and the biomechanics properties were investigated. A porcine thoracolumbar burst fracture model was used to evaluate the biomechanical performance of composite cements. The porcine thoracolumbar burst fracture models in vitro were prepared. A half of models was made by the vertebroplasty of the composite cements, the other half of models was used as control. Imaging analysis showed the composite cements distributed uniformly and solidified well. Biomechanical test showed the ability of the composite cements to repair spinal burst fractures was significant.

关键词： Cements, Injectable thoracolumbar burst fracture.

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王真权教授运用复方芩柏汤治疗湿热蕴结型溃疡性结肠炎的临床经验

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湖南中医药大学学报 2023年第1期43卷 132-137页

作者：高勇李克亚王真权宁乡市人民医院湖南宁乡410600 湖南中医药大学第二附属医院湖南长沙410005

王真权教授认为溃疡性结肠炎急性活动期的病机关键在于“湿热”,“湿热”“气滞”“血瘀”贯穿溃疡性结肠炎急性活动期的全过程,治疗应以清热燥湿为主,行气止痛、化瘀止血为辅。强调:(1)辨病辨证相结合。辨病是基础,明确溃疡性结肠炎的... 详细信息

王真权教授认为溃疡性结肠炎急性活动期的病机关键在于“湿热”,“湿热”“气滞”“血瘀”贯穿溃疡性结肠炎急性活动期的全过程,治疗应以清热燥湿为主,行气止痛、化瘀止血为辅。强调:(1)辨病辨证相结合。辨病是基础,明确溃疡性结肠炎的疾病诊断后再辨证,才能抓住其本虚标实的特点,对其活动期和缓解期特点的认识更加准确,使治疗更加具体。(2)湿热蕴结是溃疡性结肠炎急性活动期的关键病机,湿热即是重要病因,也是急性活动期致病的关键病机。(3)清热燥湿、顺势而为是溃疡性结肠炎急性活动期的关键治法。溃疡性结肠炎急性活动期发病初期以湿热蕴结为主,而后湿阻气机,瘀滞肠腑以致于血败肉腐。故临证之时应以清热燥湿为本,以调和气血为辅,祛除湿热之关键病因,断瘀血之来路,如此顺势而为,防止病情进一步进展。(4)衷中参西、内外合治是溃疡性结肠炎急性活动期的重要治疗手段。通过中医辨证论治,将复方芩柏汤颗粒剂通过口服和(或)保留灌肠的方式使药物直达病所,改善黏膜屏障,修复病变黏膜,以达到治疗的目的。

关键词：溃疡性结肠炎复方芩柏汤王真权湿热蕴结辨证论治临床经验医案

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