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Astrocytic calcium waves:unveiling their roles in sleep and arousal modulation

Neural Regeneration Research 2024年第5期19卷 984-987页

作者： erxi wu Dan Qi Damir Nizamutdinov Jason H.Huang Department of Neurosurgery and Neuroscience Institute Baylor Scott&White HealthTempleTXUSA Texas A&M University School of Medicine TempleTXUSA Texas A&M University School of Pharmacy College StationTXUSA LIVESTRONG Cancer Institutes and Department of Oncology Dell Medical Schoolthe University of Texas at AustinAustinTXUSA Department of Neurosurgery Baylor College of MedicineTempleTXUSA

Neuron-astrocyte interactions are vital for the brain’s *** astrocyte activities is crucial for comprehending the complex neural network,particularly the population-level functions of neurons in different cortical states and associated behaviors in *** on animal sleep and wakefulness have revealed distinct cortical synchrony patterns between ***,outnumbering neurons by nearly fivefold,support and regulate neuronal and synaptic *** research on astrocyte activation during cortical state transitions has emphasized the influence of norepinephrine as a neurotransmitter and calcium waves as key components of ion channel *** summary focuses on a few recent studies investigating astrocyte-neuron interactions in mouse models during sleep,wakefulness,and arousal levels,exploring the involvement of noradrenaline signaling,ion channels,and glutamatergic signaling in different cortical *** findings highlight the significant impact of astrocytes on large-scale neuronal networks,influencing brain activity and *** astrocytic signaling pathways shows promise for treating sleep disorders and arousal *** research is needed to understand astrocytic calcium signaling in different brain regions and its implications for dysregulated brain states,requiring future human studies to comprehensively investigate neuron-astrocyte interactions and pave the way for therapeutic interventions in sleep-and arousal-related disorders.

关键词： arousal astrocyte calcium waves locus coeruleus neuron-astrocyte interaction norepinephrine sleep wakefulness

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DNA aptamer S11e recognizes fibrosarcoma and acts as a tumor suppressor

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Bioactive Materials 2022年第6期7卷 278-291页

作者： Yunyi Liu Cheng Peng Hui Zhang Juan Li Hailong Ou Yang Sun Chaoqi Wen Dan Qi Xiaoxiao Hu erxi wu Weihong Tan State Key Laboratory of Chemo/Bio-Sensing and Chemometrics College of BiologyCollege of Chemistry and Chemical EngineeringMolecular Science and Biomedicine Laboratory and Aptamer Engineering Center of Hunan ProvinceHunan UniversityChangshaHunan410082China Shenzhen Research Institute Hunan UniversityShenzhenGuangdong518000China Institute of Cancer and Basic Medicine Chinese Academy of SciencesThe Cancer Hospital of the University of Chinese Academy of SciencesHangzhouZhejiang310022China Department of Neurosurgery and Neuroscience Institute Baylor Scott&White HealthTempleTX76508USA Texas A&M University Colleges of Medicine and Pharmacy College StationTX77843USA LIVESTRONG Cancer Institutes and Department of Oncology Dell Medical SchoolThe University of Texas at AustinAustinTX78712USA Institute of Molecular Medicine Renji HospitalShanghai Jiao Tong University School of MedicineAnd College of Chemistry and Chemical EngineeringShanghai Jiao Tong UniversityShanghai200240China

Fibrosarcoma is a serious malignant mesenchymal tumor with strong invasiveness,high recurrence,and poor ***,surgical resection is the main treatment for ***,due to the lack of specific biomarkers,the inability to accurately diagnose fibrosarcoma can lead to sub-optimal surgical outcomes and decreased ***,we seek to address this translational barrier and we show that DNA aptamer S11e was able to recognize fibrosarcoma cells(HT1080)but not human embryonic lung fibroblast cells with Kd values in the nanomolar *** addition,we found that S11e discerned tumors in HT1080 xenograft mouse models and tumor tissues from fibrosarcoma ***,we demonstrated that S11e internalized into HT1080 cells independent of the lysosome pathway and located in ***,we revealed that S11e promoted the apoptosis of HT1080 cells and inhibited HT1080 cell ***,we investigated the biologically functional cellular target of S11e using a mass spectrometry approach,and identified that Diablo/SMAC protein is a cellular binding protein of S11e,by interacting to which S11e inhibited HT1080 cell migration and *** together,these results provide the evidence that S11e may be useful for early diagnosis,targeted therapy,and prognostication of fibrosarcoma.

关键词： Fibrosarcoma Aptamer Mitochondria Apoptosis Migration

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Identification of new aptamer BC-3 targeting RPS7 from rapid screening for bladder carcinoma

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Genes & Diseases 2023年第5期10卷 2137-2150页

作者： Yunyi Liu Juan Li Hailong Ou Dan Qi Bei Hu Yuxi Xu Jian Hu Yi Xiong Luling Xia Jason HHuang Xiaoxiao Hu erxi wu State Key Laboratory of Chemo/Biosensing and Chemometrics College of BiologyMolecular Science and Biomedicine Laboratory and Aptamer Engineering Center of Hunan ProvinceHunan UniversityChangshaHunan 410082China Shenzhen Research Institute Hunan UniversityShenzhenGuangdong 518000China Department of Neurosurgery and Neuroscience Institute Baylor Scott&White HealthTempleTX 76508USA Department of Respiratory Medicine The Third Xiangya HospitalCentral South UniversityChangshaHunan 410013China Texas A&M University School of Medicine College StationTX 77843USA Texas A&M University School of Pharmacy College StationTX 77843USA LIVESTRONG Cancer Institutes and Department of Oncology Dell Medical SchoolThe University of Texas at AustinAustinTX 78712USA Greater Bay Area Institute for Innovation Hunan UniversityGuangzhouGuangdong 511300China

Aptamers,short single DNA or RNA oligonucleotides,have shown immense application potential as molecular probes for the early diagnosis and therapy of ***,conventional cell-SELEX technologies for aptamer discovery are time-consuming and *** we discovered a new aptamer BC-3 by using an improved rapid X-Aptamer selection process for human bladder carcinoma,for which there is no specific molecular probe *** show that BC-3 exhibited excellent affinity in bladder cancer cells but not normal *** demonstrate that BC-3 displayed high selectivity for tumor cells over their normal counterparts in vitro,in mice,and in patient tumor tissue *** endocytosis pathway analysis revealed that BC-3 internalized into bladder cancer cells via clathrin-mediated ***,we identified ribosomal protein S7(RPS7)as the binding target of BC-3 via an integrated methodology(mass spectrometry,colocalization assay,and immunoblotting).Together,we report that a novel aptamer BC-3 is discovered for bladder cancer and its properties in the disease are *** findings will facilitate the discovery of novel diagnostic and therapeutic strategies for bladder cancer.

关键词： Bladder cancer Cell-SELEX Clathrin-mediated endocytosis Intracellular colocalization Ribosomal protein S7 X-aptamer selections

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Masks and thermometers:Paramount measures to stop the rapid spread of SARS-CoV-2 in the United States

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Genes & Diseases 2020年第4期7卷 487-490页

作者： erxi wu Dan Qi Department of Neurosurgery and Neuroscience Institute Baylor Scott&White HealthTempleTX78508USA Colleges of Medicine and Pharmacy Texas A&M Health Science CenterCollege StationTX 77843USA LIVESTRONG Cancer Institutes and Department of Oncology Dell Medical SchoolThe University of Texas at AustinAustinTX78712USA

In the United States,there is currently an exponential growth for the COVID-19 *** US president’s coronavirus guidelines for America“30 Days to Slow The Spread”are *** effectively curb the rapid spread of SARS-CoV-... 详细信息

关键词： 2019-novel coronavirus(2019-nCoV) Novel coronavirus disease(COVID-19) Pandemic Respiratory tract Transmission

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Acute effects of human protein S administration after traumatic brain injury in mice

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Neural Regeneration Research 2020年第11期15卷 2073-2081页

作者： Xiaowei Wang Jing Tong Xiaodi Han Xiaoming Qi Jun Zhang erxi wu Jason H.Huang Center for Translational Neuromedicine University of RochesterRochesterNYUSA Department of Neurosurgery 4th Affiliated Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Department of Neurosurgery Tiantan HospitalBeijingChina Department of Neurosurgery Baylor Scott&White HealthTempleTXUSA Department of Neurosurgery PLA General HospitalBeijingChina College of Medicine Texas A&M Health Science CenterTempleTXUSA

Despite years of effort,no effective acute phase treatment has been discovered for traumatic brain *** impediment to successful drug development is entangled secondary injury *** we show that protein S,a natural multifunctional protein that regulates coagulation,inflammation,and apoptosis,is able to reduce the extent of multiple secondary injuries in traumatic brain injury,and therefore improve *** subjected to controlled cortical impact were treated acutely(10–15 minutes post-injury)with a single dose of either protein S(1 mg/kg)or vehicle phosphate buffered saline via intravenous *** 24 hours post-injury,compared to the non-treated group,the protein S treated group showed substantial improvement of edema and fine motor coordination,as well as mitigation of progressive tissue *** and western blot targeting caspase-3,B-cell lymphoma 2(Bcl-2)along with terminal deoxynucleotidyl transferase dUTP nick end labeling(TUNEL)assay revealed that apoptosis was suppressed in treated *** targeting CD11 b showed limited leukocyte infiltration in the protein S-treated ***,protein S treatment increased the ipsilesional expression of aquaporin-4,which may be the underlying mechanism of its function in reducing *** results indicate that immediate intravenous protein S treatment after controlled cortical impact is beneficial to traumatic brain injury *** Use Protocols(AUPs)were approved by the University Committee on Animal Resources(UCAR)of University of Rochester Medical Center(approval ***-2008-102 R)on November 12,2013.

关键词： apoptosis aquaporin-4 controlled cortical impact edema inflammation protein S TBI therapy traumatic brain injury

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Ballistic performances of the hourglass lattice sandwich structures under high-velocity fragments

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Defence Technology（防务技术） 2024年第1期31卷 312-325页

作者： He-xiang wu Jia Qu Lin-zhi wu Key Laboratory of Advanced Ship Materials and Mechanics College of Aerospace and Civil EngineeringHarbin Engineering UniversityHarbin150001China School of Civil Engineering Northeast Forestry UniversityHarbin150040China

In this paper,the numerical simulation method is used to study the ballistic performances of hourglass lattice sandwich structures with the same mass under the vertical incidence of *** is paid to elucidating the influences of rod cross-section dimensions,structure height,structure layer,and rod inclination angle on the deformation mode,ballistic performances,and ability to change the ballistic direction of *** results show that the ballistic performances of hourglass lattice sandwich structures are mainly affected by their structural *** this respect,structural parameters optimization of the hourglass lattice sandwich structures enable one to effectively improve their ballistic limit velocity and,consequently,ballistic performances.

关键词： Hourglass lattice sandwich structures Ballistic performances high-velocity Finite element analysis

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Resilience-incorporated seismic risk assessment of precast concrete frames with“dry”connections

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Earthquake Engineering and Engineering Vibration 2024年第2期23卷 403-425页

作者： wu Chenhao Tang Yuchuan Cao Xuyang wu Gang Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education Nanjing 211102China Department of Civil and Environmental Engineering University of CaliforniaLos AngelesCA 90095USA School of Civil Engineering Southeast UniversityNanjing 211102China College of Civil and Transportation Engineering Hohai UniversityNanjing 210024China

A resilience-incorporated risk assessment framework is proposed and demonstrated in this study to manifest the advantageous seismic resilience of precast concrete frame(PCF)structures with“dry”connections in terms of their low damage and rapid *** framework integrates various uncertainties in the seismic hazard,fragility,capacity,demand,loss functions,and post-earthquake *** this study,the PCF structures are distinguished from ordinary reinforced concrete frame(RCF)structures by characterizing multiple limit states for the PCF based on its unique damage ***,probabilistic story-wise pushover analyses are performed to yield story-wise capacities for the predefined limit *** the seismic resilience analysis,a step-wise recovery model is proposed to idealize the functionality recovery process,with separate considerations of the repair and non-repair *** recovery model leverages the economic loss and downtime to delineate the stochastic post-earthquake recovery curves for the resilience loss *** such,contingencies in the probabilistic post-earthquake repairs are incorporated and the empirical judgments on the recovery parameters are largely *** proposed framework is demonstrated through a comparative study between two“dry”connected PCFs and one RCF designed as alternative structural systems for a prototype *** results from the risk quantification indicate that the PCFs show reduced loss hazards and lower expected losses relative to the ***,the PCF equipped with energy dissipation devices at the“dry”connections largely reduces the expected economic loss,downtime,and resilience loss by 29%,56%,and 60%,respectively,compared to the RCF.

关键词： precast concrete frame non-emulative precast system seismic resilience seismic risk functional recovery

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New findings on the influence of El Nino events on tropical cyclone formation

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Science China Earth Sciences 2024年第3期67卷 892-893页

作者： Liguang wu Department of Atmospheric and Oceanic Sciences Institute of Atmospheric SciencesFudan UniversityShanghai 200438China

Tropical cyclones typically form over warm tropical and subtropical ocean surfaces, as their formation and intensification rely primarily on the energy provided by the ocean. Pioneering research by Gray (1968) revealed that the formation of tropical cyclones requires the sea surface temperature (SST) to be no less than 26.5℃. Consequently, SST is commonly recognized as a crucial parameter among the environmental factors influencing tropical cyclone formation(Gray, 1979;Emanuel and Nolan, 2004).

关键词： tropical cyclone ocean

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The Functional Redundancy of Neddylation E2s and E3s in Modulating the Fitness of Regulatory T Cells

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Research 2024年第2期2023卷 373-387页

作者： Di wu Yi Sun Cancer Institute(Key Laboratory of Cancer Prevention and Intervention China National Ministry of Education)of the Second Affiliated Hospital and Institute of Translational MedicineZhejiang University School of MedicineHangzhou 310029China Cancer Center of Zhejiang University Hangzhou 310029China Zhejang Provincial Clinical Research Center for Cancer Zhejang ProvinceChina Key Laboratory of Molecular Biology in Medical Sciences Zhejang ProvinceChina Research Center for Life Science and Human Health Binjiang Institute of Zhejiang UniversityHangzhou 310053China

Neddylation is necessary for activation of Cullin-RING ligases(CRLs),which degrade various immune regulatory *** recent study showed that while depletion of neddylation E2-E3 pair Ube2f-Sag in regulatory T(T_(reg))cells had no obvious phenotype,the same depletion of either Ube2m or Rbx1 caused inflammation disorders with different *** these E2s or E3s compensate each other in functional regulations of T_(reg)cells is,however,previously *** this report,we generated Foxp3^(Cre);Ube2m^(fl/fl);Ube2f^(fl/fl)or Foxp3^(Cre);Rbx1^(fl/fl);Sag^(fl/fl)double-null mice by simultaneous deletion of both neddylation E2s or E3s in T_(reg)cells,***,Ube2m&Ube2f double-null mice developed much severe autoimmune phenotypes than did Ube2m-null mice,indicating that Ube2m markedly compensates Ube2f in T_(reg)*** minor worsened autoimmune phenotypes seen at the very early stage in Rbx1&Sag double-null than Rbx1-null mice is likely due to already severe phenotypes of the later,indicating a minor compensation of Rbx1 for *** RNA profiling-based analyses revealed that up-and down-regulations of few signaling pathways in T_(reg)cells are associated with the severity of autoimmune ***,severer inflammation phenotypes seen in mice with double E3-null than with double E2-null T_(reg)cells indicate a neddylation-independent mechanism of 2 E3s,also known to serve as the RING component of CRLs in regulation of T_(reg)cell fitness.

关键词： Foxp3 inflammation markedly

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Rational surface charge engineering of haloalkane dehalogenase for boosting the enzymatic performance in organic solvent solutions

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Chinese Journal of Chemical Engineering 2024年第1期65卷 276-285页

作者： Yin wu Yan Sun Department of Biochemical Engineering School of Chemical Engineering and Technology and Key Laboratory of Systems Bioengineering and Frontiers Science Center for Synthetic Biology(Ministry of Education)Tianjin UniversityTianjin 300350China

Biocatalysis in organic solvents(OSs)has numerous important applications,but native enzymes in OSs often exhibit limited catalytic ***,we proposed a computation-aided surface charge engineering strategy to improve the catalytic performance of haloalkane dehalogenase DhaA in OSs based on the energetic analysis of substrate binding to the DhaA *** variants with enhanced OS resistance were obtained by replacing negative charged residues on the surface with positive charged residue(Arg).Particularly,a four-substitution variant E16R/E93R/E121R/E257R exhibited the best catalytic performance(five-fold improvement in OS resistance and seven-fold half-life increase in 40%(vol)dimethylsulfoxide).As a result,the overall catalytic performance of the variant could be at least 26 times higher than the wild-type *** spectroscopy and molecular dynamics simulation studies revealed that the residue substitution mainly enhanced OS resistance from four aspects:(a)improved the overall structural stability,(b)increased the hydrophobicity of the local microenvironment around the catalytic triad,(c)enriched the hydrophobic substrate around the enzyme molecule,and(d)lowered the contact frequency between OS molecules and the catalytic *** findings validate that computationaided surface charge engineering is an effective and ingenious rational strategy for tailoring enzyme performance in OSs.

关键词： Surface charge engineering Organic solvent resistance Molecular dynamics simulation Haloalkane dehalogenase

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