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Identification and Characterization of hmr1. Gene Encoding a Multidrug Resistance Efflux Protein from Streptomyces hygroscopicus *** Strain 1.-2.

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Acta Biochimica et Biophysica Sinica 2004年第8期36卷 519-528页

作者： Lei QIN , Heng-An WANG1 , Zhong-Qin WU, xiao-Feng zhang, Mei-Lei {2.,Zi-Xin DENG2. and Guo-Ping ZHAOShanghaiResearch Center of Biotechnology, Shanghai institute for Biological {3., chinese academy of sciences,Graduate School of the chinese academy of sciences, Shanghai 2.02.3. China 1School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 2.1101, China 2.chool of Life Science and Biotechnology, Shanghai Jiaotong University, Shanghai 2.003., China ShanghaiResearch Center of Biotechnology Shanghai Institute for Biological Sciences Chinese Academy of Sciences Graduate School of the Chinese Academy of Sciences School of Agriculture and Biology Shanghai Jiaotong University

The hmr1. gene was cloned from Streptomyces hygroscopicus subsp. yingchengensis strain 1.- 2., a bacterium strain producing agricultural antibiotics. Sequence similarity comparison indicates that hmr1. gene may encode a predicted protein with 1. putative transmembrane α-helical spanners, belonging to the drug:H+ antiporter-2.family of the major facilitator superfamily. The expression of hmr1. in the mycelium of strain 1.-2. was detected by Western blotting analysis. Gene replacement technology was employed to construct an hmr1. disruption mutant. The growth inhibition test against different antibiotics indicated that the mutant strain was 5–2. fold more susceptible to tetracycline, vancomycin and mitomycin C than the parental wild type strain. The mutant took up tetracycline much faster and accumulated more antibiotics than the wild type strain 1.-2.. While with the addition of an energy uncoupler, carbonyl cyanide m- chlorophenylhydrazone, the characteristics of the accumulation of [3.]tetracycline in these two strains were almost the same. It was thus concluded that hmr1. encoded a multidrug resistance efflux protein.

关键词： multidrug resistance (MDR) gene replacement (knockout) Streptomyces Streptomyces hygroscopicus subsp. yingchengensis strain 1.-2.

Inflammatory and Immunomodulatory Effects of Tripterygium wilfordii Multiglycoside in Mouse Models of Psoriasis Keratinocytes

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chinese Journal of Integrative Medicine 2024年第3期30卷 222-229页

作者： zhang Shuo LI Hong-{1. YANG Chun-mei LIU Liu SUN {2.-ying WANG Jiao CHEN Si-ting LU Yi HU Man-qi YAN Ge ZHOU Ya-qiong MIAO {2. LI Xin LI Bin Department of Dermatology Yueyang Hospital of Integrated Traditional Chinese and Western MedicineShanghai University of Traditional Chinese MedicineShanghai200437China institute of Dermatology Shanghai Academy of Traditional Chinese MedicineShanghai201203China Department of Integrated Traditional chinese and Western Medicine Shanghai Skin Disease HospitalTongji University School of MedicineShanghai200443China

Objective:To determine the role of Tripterygium wilfordii multiglycoside(TGW) in the treatment of psoriatic dermatitis from a cellular immunological ***:Mouse models of psoriatic dermatitis were established by imiquimod(IMQ).Twelve male BALB/c mice were assigned to MQ or IMQ+TGW groups according to a random number *** changes in vivo were assessed by hematoxylin and eosin *** of immune cells and cytokines in mice,as well as PAM2.2.cell proliferation in vitro were assessed by flow ***-inflammatory cytokine expression was determined using reverse transcription quantitative polymerase chain ***:TGW significantly ameliorated the severity of IMQ-induced psoriasis-like mouse skin lesions and restrained the activation of CD45^(+)cells,neutrophils and T lymphocytes(all P1..Moreover,TGW significantly attenuated keratinocytes(KCs) proliferation and downregulated the mRNA levels of inflammatory cytokines including interleukin(IL)-1.A,IL-2.,tumor necrosis factor α,and chemokine(C-X-C motif) ligand 1.P1.or P1. cells in skin lesion of mice and draining lymph nodes(P1..Conclusions:TGW improved psoriasis-like inflammation by inhibiting KCs proliferation,as well as the associated immune cells and cytokine *** inhibited IL-1. secretion from γδ T cells,which improved the immune-inflammatory microenvironment of psoriasis.

关键词： psoriasis Tripterygium wilfordii multiglycoside γδT cells inflammation chinese medicine

Chitosan-based thermosensitive hydrogel with long-term release of murine nerve growth factor for neurotrophic keratopathy

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Neural Regeneration Research 2024年第3期19卷 680-686页

作者： jie Wu Yulei Huang Hanrui Yu Kaixiu Li Shifeng {1. Guoqing Qiao {2. Liu Hongmei Duan Yifei Huang Kwok-Fai So Zhaoyang Yang {2.guang Li Liqiang Wang Department of Ophthalmology the Third Medical CenterChinese PLA General HospitalBeijingChina The PLA Medical College Department of NephrologyChinese PLA Institute of NephrologyState Key Laboratory of Kidney DiseasesNational Clinical Research Center for Kidney DiseasesBeijingChina Department of Ophthalmology Hainan Hospital of Chinese PLA General HospitalSanyaHainan ProvinceChina Medical School of chinese PLA BeijingChina Department of Neurobiology School of Basic Medical SciencesCapital Medical UniversityBeijingChina Guangdong-Hongkong-Macao institute of CNS Regeneration Ministry of Education CNS Regeneration Collaborative Joint LaboratoryJinan UniversityGuangzhouGuangdong ProvinceChina Bioland Laboratory(Guangzhou Regenerative Medicine and Health Guangdong Laboratory) GuangzhouGuangdong ProvinceChina Department of Ophthalmology and State Key Laboratory of Brain and Cognitive sciences The University of Hong KongHong Kong Special Administrative RegionChina Center for Brain Science and Brain-Inspired Intelligence Guangdong-Hong Kong-Macao Greater Bay AreaGuangzhouGuangdong ProvinceChina Co-innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina School of Engineering Medicine Beijing Key Laboratory for Biomaterials and Neural RegenerationBeihang UniversityBeijingChina Beijing International Cooperation Bases for Science and Technology on Biomaterials and Neural Regeneration Beijing Advanced Innovation Center for Big Data-Based Precision MedicineBeihang UniversityBeijingChina

Neurotrophic keratopathy is a persistent defect of the corneal epithelium,with or without stromal ulceration,due to corneal nerve deficiency caused by a variety of *** treatment options for neurotrophic keratopathy are *** this study,an ophthalmic solution was constructed from a chitosan-based thermosensitive hydrogel with long-term release of murine nerve growth factor(CTH-mNGF).Its effectiveness was evaluated in corneal denervation(CD)mice and patients with neurotrophic *** the preclinical setting,CTH-mNGF was assessed in a murine corneal denervation ***-mNGF was transparent,thermosensitive,and ensured sustained release of mNGF for over 2. hours on the ocular surface,maintaining the local mNGF concentration around 1.1.0 pg/mL in *** denervation mice treated with CTH-mNGF for 1. days showed a significant increase in corneal nerve area and total corneal nerve length compared with non-treated and CTH treated mice.A subsequent clinical trial of CTH-mNGF was conducted in patients with stage 2.or {1.neurotrophic *** received topical CTH-mNGF twice daily for 8 *** sodium images,Schirmer’s test,intraocular pressure,Cochet-Bonnet corneal perception test,and best corrected visual acuity were *** total,six patients(total of seven eyes)diagnosed with neurotrophic keratopathy were *** 8 weeks of CTH-mNGF treatment,all participants showed a decreased area of corneal epithelial defect,as stained by ***,six out of seven eyes had fluorescence staining scores<***,best corrected visual acuity,intraocular pressure,Schirmer’s test and Cochet-Bonnet corneal perception test results showed no significant *** increase in corneal nerve density was observed by in vivo confocal microscopy after 8 weeks of CTH-mNGF treatment in three out of seven *** study demonstrates that CTH-mNGF is transparent,thermosensitive,and has sustained-release *** effecti

关键词： chitosan corneal reinnervation murine nerve growth factor neurotrophic keratopathy thermosensitive hydrogel

Ground State Structure of Hs Super-heavy Isotopes

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原子核物理评论 2009年第S1期26卷 175-180页

作者： MA Long1.ZHOU xiao-hong1.{1. Hong-fei2.GAN Zai-guo1. LI Jun-qing1.3.(1.{2. of Modern Physics,{3. academy of sciences,Lanzhou 73.000,China 2.School of Nuclear Science and Technology,Lanzhou University,Lanzhou 73.000,China 3.Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Research Facility in Lanzhou,Lanzhou 73.000,China) institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China School of Nuclear Science and Technology Lanzhou UniversityLanzhou 730000China institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China Center of Theoretical Nuclear Physics National Laboratory of Heavy Ion Research Facility in LanzhouLanzhou 730000China

The ground state properties of Hs nuclei studied in the framework of the relativistic mean field theory revealed that more stable isotopes are located on the proton abundant side of the chain. The last stable nucleus to the proton drip line is 2.6Hs. The most stable unknown Hs nucleus may be 2.8Hs. The density dependent delta interaction pairing is used to improve the BCS pairing correction,which results in more reasonable single-particle energy level distributions and nucleon occupation,and it is shown to be available to describe the properties of nuclei in the superheavy region.

关键词： superheavy nucleus nuclear structure pairing

Pannexins in the musculoskeletal system:new targets for development and disease progression

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Bone Research 2024年第2期12卷 255-269页

作者： Yan Luo Shengyuan Zheng Wenfeng xiao Hang {1. Yusheng Li Department of Orthopedics Xiangya HospitalCentral South UniversityChangshaHunan 410008China National Clinical Research Center for Geriatric Disorders Xiangya HospitalCentral South UniversityChangshaHunan 410008China Department of Clinical Medicine Xiangya Medicine SchoolCentral South UniversityChangshaHunan 410008China Shenzhen institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China

During cell differentiation,growth,and development,cells can respond to extracellular stimuli through communication ***(Panx)family and connexin(Cx)family are two important types of channel-forming *** family contains three members(Panx1.3.and is expressed widely in bone,cartilage and *** there is no sequence homology between Panx family and Cx family,they exhibit similar configurations and *** to Cxs,the key roles of Panxs in the maintenance of physiological functions of the musculoskeletal system and disease progression were gradually revealed ***,we seek to elucidate the structure of Panxs and their roles in regulating processes such as osteogenesis,chondrogenesis,and muscle *** also focus on the comparison between Cx and *** a new key target,Panxs expression imbalance and dysfunction in muscle and the therapeutic potentials of Panxs in joint diseases are also discussed.

关键词： skeletal diseases system

Statistical study of magnetic holes in the upstream region of Mercury’s bow shock

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Earth and Planetary Physics 2024年第2期8卷 326-337页

作者： GuoQiang Wang SuDong xiao MingYu Wu YuanQiang Chen TieLong {1. institute of Space Science and Applied Technology Harbin Institute of TechnologyShenzhen 518055China Shenzhen Key Laboratory of Numerical Prediction for Space Storm Harbin Institute of TechnologyShenzhen 518055China Mengcheng National Geophysical Observatory University of Science and Technology of ChinaHefei 230026China chinese {1. of {2. Center for Excellence in Comparative Planetology Hefei 230026China Space Research institute Austrian Academy of SciencesGrazAustria

Magnetic holes are magnetic depression structures that exist widely in many plasma *** magnetic holes with durations of>1.s in the solar wind at Mercury’s orbit have drawn much attention,but the properties of the mag... 详细信息

Magnetic holes are magnetic depression structures that exist widely in many plasma *** magnetic holes with durations of>1 s in the solar wind at Mercury’s orbit have drawn much attention,but the properties of the magnetic holes with shorter durations are still ***,we investigate the magnetic holes with durations of 0.1-100 s in the upstream region of Mercury’s bow shock based on observations by the MESSENGER(MErcury Surface,Space ENvironment,GEochemistry,and Ranging)*** can be divided into two groups according to the distribution of their duration:small-duration magnetic holes(SDMHs,0.6 s).The duration of each group approximately obeys a log-normal distribution with a median of~0.2. s and 3.s,*** 1.7%(3.0}6%)of the SDMHs(LDMHs)reduce the magnetic field strength by more than 50%.For both groups,some structures have a linear or quasi-linear polarization,whereas others have an elliptical *** magnetic hole events in both groups tend to have a higher rate of occurrence when the interplanetary magnetic field strength is *** occurrence rates are also affected by Mercury’s foreshock,which can increase(decrease)the occurrence rate of the SDMHs(LDMHs).This finding suggests that Mercury’s foreshock might be one source of the SDMHs and that the foreshock can destroy some *** observations suggest that a new group of magnetic holes with durations of<0.6 s exist in the upstream region of Mercury’s bow shock.

关键词： magnetic hole solar wind Mercury foreshock

A human-specific insertion promotes cell proliferation and migration by enhancing TBC1.8B expression

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Science China(Life sciences) 2024年第4期67卷 765-777页

作者： Hui Zhao Lin-Lin Liu Jian Sun Lian jin Hai-Bing Xie Jian-Bo Li Hui Xu Dong-Dong Wu {1.-Lin Zhuang Min-Sheng Peng Ya-Jun Guo Wei-Zhu Qian Newton OOtecko Wei-{2. Sun Liang-Hu Qu {2. He Zhao-Li Chen Rong Liu Ce-Shi Chen Ya-Ping zhang State Key Laboratory for Conservation and Utilization of Bio-resource School of Life SciencesSchool of Ecology and Environmental ScienceYunnan UniversityKunming 650091China School of Forensic Medicine Kunming Medical UniversityKunming 650500China academy of Biomedical Engineering Kunming Medical UniversityKunming 650500China The Third Affiliated Hospital Kunming Medical UniversityKunming 650118China Key Laboratory of Animal Models and Human Disease Mechanisms of the chinese academy of sciences and Yunnan Province Kunming Institute of ZoologyChinese Academy of SciencesKunming 650201China State Key Laboratory of Genetic Resources and Evolution Yunnan Laboratory of Molecular Biology of Domestic AnimalsKunming Institute of ZoologyChinese Academy of SciencesKunming 650201China The Key Laboratory of Gene Engineering of the Ministry of Education State Key Laboratory for BiocontrolSun Yat-sen UniversityGuangzhou 510275China National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody Shanghai 201203China Department of Thoracic Surgery Cancer Institute and HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Human-specific insertions play important roles in human phenotypes and *** we reported a 446-bp insertion(Insert-446)in intron 1. of the TBC1.8B gene,located on chromosome X,and traced its origin to a portion of intron 6 of the EBF1.gene on chromosome ***,Insert-446 was present in the human Neanderthal and Denisovans genomes,and was fixed in humans after human-chimpanzee *** have demonstrated that Insert-446 acts as an enhancer through binding transcript factors that promotes a higher expression of human TBC1.8B gene as compared with orthologs in *** addition,over-expression TBC1.8B promoted cell proliferation and migration through“a dual finger”catalytic mechanism(Arg53. and Gln573.in the TBC domain in vitro and knockdown of TBC1.8B attenuated tumorigenesis in *** of Insert-446 prevented cell proliferation and migration in cancer and normal *** results reveal that the human-specific Insert-446 promotes cell proliferation and migration by upregulating the expression of TBC1.8B *** findings provide a significant insight into the effects of human-specific insertions on evolution.

关键词： human-specific insertion enhancer gene expression cell proliferation and migration

PEGylated graphene oxide-mediated stimulation of vascular endothelial cells and responsive release of PD-1.PD-L1.inhibitor for efficient chemo-immunotherapy against cancer Author links open overlay panel

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Particuology 2024年第8期91卷 280-290页

作者： Yan Wang Feng Li Shuang Wang Jiaqi Meng xiao {1. Wei Wei State Key Laboratory of Biochemical Engineering Institute of Process EngineeringChinese Academy of SciencesBeijing100190China Key Laboratory of Biopharmaceutical Preparation and Delivery Chinese Academy of SciencesBeijing100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing100049China

Immune checkpoint blockade(ICB)has emerged as a promising immunotherapeutic modality against cancer in the ***,only 1.-3.%of patients respond to ICB,primarily due to poor immunogenicity and insufficient T cell infiltration in solid ***,we presented an approach for high-performance cancer treatment using the programmed cell death protein-1.and programmed cell death ligand-1.PD-1.PD-L1.inhibitor(BMS-{1.{1.-loaded PEGylated graphene oxide(GPi).On the one hand,GPi dissociated tight junctions of vascular endothelial cells(VECs)in tumor,thus promoting the extravasation and intratumoral accumulation of liposomal doxorubicin(LipDox),which then effectively induced immunogenic cell death of tumor *** the other hand,GPi also stimulated VECs to upregulate the expression of cell-cell interaction molecules,such as intercellular cell adhesion molecule-1.and vascular cell adhesion molecule-1.which facilitated the infiltration of T cells in *** acting as a stimulator of VECs,GPi could exert responsive release of BMS-{1.{1.under the acidic tumor microenvironment and blockade PD-1.PD-L1.axis in ***,the alternating administration of GPi and LipDox effectively inhibited tumor growth in a 4T1.tumor model,providing a novel treatment mode for chemo-immunotherapy.

关键词： PEGylated graphene oxide Vascular endothelial cells Immune checkpoint blockade Immunogenic cell death Chemo-immunotherapy

In situ forming injectable MSC-loaded GelMA hydrogels combined with PD for vascularized sweat gland regeneration

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Military Medical Research 2024年第1期11卷 152-155页

作者： Enhe Jirigala Bin Yao Zhao Li Yi-jie {1. Chao {1. Li-Ting Liang Fan-Liang {1. Xing-Yu Yuan Xian-Lan Duan Wei Song Meng-De {1. Yi Kong xiao-Bing Fu Sha Huang Research Center for Tissue Repair and Regeneration Medical Innovation Research DepartmentChinese PLA General Hospital and PLA Medical CollegeBeijing 100048China institute of Basic Medical Research Inner Mongolia Medical UniversityHohhot 010110China academy of Medical Engineering and Translational Medicine Tianjin UniversityTianjin 300072China School of Medicine Nankai UniversityTianjin 300071China

Dear Editor,Three dimensional(3.)bioprinted extracellular matrix(ECM)can be used to provide both biochemical and biophysical cues to direct mesenchymal stem cells(MSCs)differentiation,and then differentiated cells were isolated for implantation in vivo using surgical ***,the reduced cell activity after cell isolation from 3. constructs and low cell retention in injured sites limit its application[1..Methacrylated gelatin(GelMA)hydrogel has the advantage of fast crosslinking,which could resemble complex architectures of tissue construct in vivo[2..Here,we adopted a noninvasive bioprinting procedure to imitate the regenerative microenvironment that could simultaneously direct the sweat gland(SG)and vascular differentiation from MSCs and ultimately promote the replacement of glandular tissue in situ(Fig.1.).

关键词： Sweat gland GelMA In situ niche Cell differentiation Tissue incorporation Vascularization