检索结果-南通市图书馆

Journal of Molecular Cell Biology 2016年第1期8卷 2-16页

作者： Yanping Zhu ta-wei liu Zarina Madden Scott A.Yuzwa Kelsey Murray Samy Cecioni Natasha Zachara David J.Vocadlo Department of Chemistry Simon Fraser UniversityBurnabyBritish Columbia V5A 1S6Canada Department of Molecular Biology and Biochemistry Simon Fraser UniversityBurnabyBritish Columbia V5A 1S6Canada Department of Biological Chemistry Johns Hopkins University Medical SchoolBaltimoreMD 21205USA

O-glycosylation of the nuclear pore complex(NPC)by O-linked N-acetylglucosamine(O-GlcNAc)is conserved within *** nucleoporins(Nups)comprising the NPC are constitutively O-GlcNAcylated,but the functional role of this modification remains *** loss ofO-GlcNAc,induced by either inhibition ofO-GlcNAc transferase(OGT)or deletion of the gene encoding OGT,leads to decreased cellular levels of a number of natively O-GlcNAcylated *** of O-GlcNAc enables increased ubiquitination of these Nups and their increased proteasomal *** decreased half-life of these deglycosylated Nups manifests in their gradual loss from the NPC and a downstream malfunction of the nuclear pore selective permeability barrier in both dividing and post-mitotic *** findings define a critical role of O-GlcNAc modification of the NPC in maintaining its composition and the function of the selectivity *** results implicate NPC glycosylation as a regulator of NPC function and reveal the role of conserved glycosylation of the NPC among metazoans.

关键词： post-translational modiﬁcation O-GlcNAcylation nuclear pore complex protein stability ubiquitination nucleoporin glycosylation

Oxidation Resistance of Form-stable Hightemperature Phase Change Thermal Energy Storage Materials Doped by Impregnated Graphite

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2025年第1期40卷 1-12页

作者： LI Baorang DAI Jianhuan ZHANG wei liu Xiangchen YANG liu School of Energy Power and Mechanical Engineering North China Electric Power UniversityBeijing 102206China School of Ener-gy and Environment Southeast UniversityNanjing 210096China

We adopted the solution impregnation route with aluminum dihydrogen phosphate solution as liquid medium for effective surface modification on graphite *** mass ratio of graphite to Al(H_(2)PO_(4))_(3) changed from 0.5:1 to 4:1,and the impregnation time changed from 1 to 7 *** typical composite phase change thermal storage materials doped with the as-treated graphite were fabricated using form-stable *** investigate the oxidation and anti-oxidation behavior of the impregnated graphite at high temperatures,the samples were put into a muffle furnace for a cyclic heat *** on SEM,EDS,DSC techniques,analyses on the impregnated technique suggested an optimized processing conditions of a 3 h impregnation time with the ratio of graphite:Al(H_(2)PO_(4))_(3) as 1:3 for graphite impregnation *** investigations on high-temperature phase change heat storage materials doped by the treated graphite suggested excellent oxidation resistance and thermal cycling performance.

关键词： phase change materials graphite impregnation method oxidation,sintering thermal analysis

Three-dimensional fracture of UO2 ceramic pellets by phase field modeling

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 169-180页

作者： wei Xiong Xuan Ye Hongzhang Cheng Xiaoming liu Institute of Nuclear and New Energy Technology Collaborative Innovation Center of Advanced Nuclear Energy Technology Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education Tsinghua University State Key Laboratory of Nonlinear Mechanics Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Fracture is the primary failure type for the UO2ceramic pellets,which are operated under irradiation and thermal processes,and physically confined by the *** this work,by combining closely coupled physical processes of heat conduction,heat transfer,and mechanical deformation with the cohesive phase field framework,we proposed a high-precision modeling of quasistatic cracking of three-dimensional （3D） UO2ceramic fuel pellets under high temperature and *** simulation results agree well with the experimental results,indicating that the proposed method has the potential to capture 3D crack modes in the interested time ***,we studied the relation of the 3D fracture patterns of fuel pellets with the peak power *** was found that the power level plays a critical role in determining the competition between radial and circumferential cracks,as well as transverse penetrating cracks.

关键词： phase field method nuclear fuel pellet coupled thermo-mechanical model thermal fracture

PI3K/AKT signaling and neuroprotection in ischemic stroke:molecular mechanisms and therapeutic perspectives

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2758-2775页

作者： Tianlong liu Xiaolin Li Xiaowei Zhou wei Chen Aidong Wen Minna liu Yi Ding Department of Pharmacy Xijing HospitalFourth Military Medical UniversityXi’anShaanxi ProvinceChina Department of Pharmacy The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina Department of Pharmacy The 944 Hospital of Joint Logistics Support Forces of Chinese PLAJiuquanGansu ProvinceChina Department of Nephrology The 940 Hospital of Joint Logistics Support Forces of Chinese PLALanzhouGansu ProvinceChina

It has been reported that the PI3K/AKT signaling pathway plays a key role in the pathogenesis of ischemic *** a result,the development of drugs targeting the PI3K/AKT signaling pathway has attracted increasing attention from *** article reviews the pathological mechanisms and advancements in research related to the signaling pathways in ischemic stroke,with a focus on the PI3K/AKT signaling *** key findings include the following:(1)The complex pathological mechanisms of ischemic stroke can be categorized into five major types:excitatory amino acid toxicity,Ca^(2+)overload,inflammatory response,oxidative stress,and apoptosis.(2)The PI3K/AKT-mediated signaling pathway is closely associated with the occurrence and progression of ischemic stroke,which primarily involves the NF-κB,NRF2,BCL-2,mTOR,and endothelial NOS signaling pathways.(3)Natural products,including flavonoids,quinones,alkaloids,phenylpropanoids,phenols,terpenoids,and iridoids,show great potential as candidate substances for the development of innovative anti-stroke medications.(4)Recently,novel therapeutic techniques,such as electroacupuncture and mesenchymal stem cell therapy,have demonstrated the potential to improve stroke outcomes by activating the PI3K/AKT signaling pathway,providing new possibilities for the treatment and rehabilitation of patients with ischemic *** investigations should focus on the direct regulatory mechanisms of drugs targeting the PI3K/AKT signaling pathway and their clinical translation to develop innovative treatment strategies for ischemic stroke.

关键词： apoptosis autophagy inflammation ischemic stroke neuroprotection oxidative stress pathogenesis phosphatidylinositol 3-kinase protein kinase B therapeutics

Molecular Structure tailoring of Organic Spacers for High‑Performance Ruddlesden–Popper Perovskite Solar Cells

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 314-357页

作者： Pengyun liu Xuejin Li Tonghui Cai wei Xing Naitao Yang Hamidreza Arandiyan Zongping Shao Shaobin Wang Shaomin liu School of Materials Science and Engineering State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao 266580People’s Republic of China School of Chemistry and Chemical Engineering Shandong University of TechnologyZibo 255049People’s Republic of China Centre for Applied Materials and Industrial Chemistry(CAMIC) School of ScienceRMIT UniversityMelbourneVic 3000Australia WA School of Mines:Minerals Energy and Chemical Engineering(WASM‑MECE)Curtin UniversityPerthWA 6102Australia School of Chemical Engineering The University of AdelaideAdelaideSA 5005Australia School of Engineering Great Bay UniversityDongguan 523000People’s Republic of China

Layer-structured Ruddlesden–Popper(RP)perovskites(RPPs)with decent stability have captured the imagination of the photovoltaic research community and bring hope for boosting the development of perovskite solar cell(PSC)***,two-dimensional(2D)or quasi-2D RP PSCs are encountered with some challenges of the large exciton binding energy,blocked charge transport and poor film quality,which restrict their photovoltaic ***,these issues can be readily resolved by rationally designing spacer cations of *** review mainly focuses on how to design the molecular structures of organic spacers and aims to endow RPPs with outstanding photovoltaic *** firstly elucidated the important roles of organic spacers in impacting crystallization kinetics,charge transporting ability and stability of *** we brought three aspects to attention for designing organic ***,we presented the specific molecular structure design strategies for organic spacers of RPPs aiming to improve photovoltaic performance of RP *** proposed strategies in this review will provide new avenues to develop novel organic spacers for RPPs and advance the development of RPP photovoltaic technology for future applications.

关键词： Ruddlesden-Popper perovskites Low-dimensional perovskite solar cells Organic spacers Molecular structure Design strategies

Inhibiting ceramide synthase 5 expression in microglia decreases neuroinflammation after spinal cord injury

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第10期20卷 2955-2968页

作者： wei Zhang Yubao Lu Ruoqi Shen Yingjie Wu Chenrui liu Xingxing Fang Liangming Zhang Bin liu Limin Rong Department of Spine Surgery The Third Affiliated HospitalSun Yat-sen UniversityGuangzhouGuangdong ProvinceChina National Medical Products Administration(NMPA)Key Laboratory for Quality Research and Evaluation of Cell Products GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Quality Control of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina Guangdong Provincial Center for Engineering and Technology Research of Minimally Invasive Spine Surgery GuangzhouGuangdong ProvinceChina

Microglia,the resident monocyte of the central nervous system,play a crucial role in the response to spinal cord ***,the precise mechanism remains *** investigate the molecular mechanisms by which microglia regulate the neuroinflammatory response to spinal cord injury,we performed single-cell RNA sequencing dataset analysis,focusing on changes in microglial *** found that the MG1 subpopulation emerged in the acute/subacute phase of spinal cord injury and expressed genes related to cell pyroptosis,sphingomyelin metabolism,and neuroinflammation at high ***,we established a mouse model of contusive injury and performed intrathecal injection of siRNA and molecular inhibitors to validate the role of ceramide synthase 5 in the neuroinflammatory responses and pyroptosis after spinal cord ***,we established a PC12-BV2 cell co-culture system and found that ceramide synthase 5 and pyroptosis-associated proteins were highly expressed to induce the apoptosis of neuron *** ceramide synthase 5 expression in a mouse model of spinal cord injury effectively reduced ***,ceramide synthase 5-induced pyroptosis was dependent on activation of the NLRP3 signaling *** ceramide synthase 5 expression in microglia in vivo reduced neuronal apoptosis and promoted recovery of neurological ***2g7 formed a“bridge”between sphingolipid metabolism and ceramide synthase 5-mediated cell death by inhibiting the NLRP3 signaling ***,these findings suggest that inhibiting ceramide synthase 5 expression in microglia after spinal cord injury effectively suppressed microglial pyroptosis mediated by NLRP3,thereby exerting neuroprotective effects.

关键词： ceramide synthase 5 gasdermin D microglia neuroinflammation NLRP3 nuclear factor kappa B Pla2g7 pyroptosis sphingomyelin metabolism spinal cord injury

Outreach onsite treatment with a simplified pangenotypic directacting anti-viral regimen for hepatitis C virus micro-elimination in a prison

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第2期28卷 263-274页

作者： Chun-Ting Chen Ming-Ying Lu Meng-Hsuan Hsieh Pei-Chien Tsai Tsai-Yuan Hsieh Ming-Lun Yeh Ching-I Huang Yi-Shan Tsai Yu-Min Ko Ching-Chih Lin Kuan-Yu Chen Yu-Ju wei Po-Yao Hsu Cheng-Ting Hsu Tyng-Yuan Jang ta-wei liu Po-Cheng Liang Ming-Yen Hsieh Zu-Yau Lin Chung-Feng Huang Jee-Fu Huang Chia-Yen Dai Wan-Long Chuang Yu-Lueng Shih Ming-Lung Yu Division of Gastroenterology and Hepatology Department of Internal MedicineTri-Service General Hospital Penghu BranchNational Defense Medical CenterPenghu County 88041Taiwan Division of Gastroenterology and Hepatology Department of Internal MedicineTri-Service General HospitalNational Defense Medical CenterTaipei 11490Taiwan Division of Hepatobiliary Department of Internal Medicine and Hepatitis CenterKaohsiung Medical University HospitalKaohsiung 80708Taiwan School of Medicine and Hepatitis Research Center College of Medicineand Center for Liquid Biopsy and Cohort ResearchKaohsiung Medical UniversityKaohsiung 80708Taiwan National Pingtung University of Science and Technology Pingtung 912Taiwan

BACKGROUND Prisoners are at risk of hepatitis C virus(HCV)infection,especially among the people who inject drugs(PWID).We implemented an outreach strategy in combination with universal mass screening and immediate onsite treatment with a simplified pan-genotypic direct-acting antivirals(DAA)regimen,12 wk of sofosbuvir/velpatasvir,in a PWID-dominant prison in *** To implement an outreach strategy in combination with universal mass screening and immediate onsite treatment with a simplified pan-genotypic DAA regimen in a PWID-dominant prison in *** HCV-viremic patients were recruited for onsite treatment program for HCV micro-elimination with a pangenotypic DAA regimen,12 wk of sofosbuvir/velpatasvir,from two cohorts in Penghu Prison,either identified by mass screen or in outpatient clinics,in September *** group of HCV-viremic patients identified sporadically in outpatient clinics before mass screening were enrolled as a control *** primary endpoint was sustained virological response(SVR12,defined as undetectable HCV ribonucleic acid(RNA)12 wk after end-of-treatment).RESULTS A total of 212 HCV-viremic subjects were recruited for HCV micro-elimination campaign;91 patients treated with sofosbuvir/Ledipasvir or glecaprevir/pibrentasvir before mass screening were enrolled as a *** HCV microelimination group had significantly lower proportion of diabetes,hypertension,hyperlipidemia,advanced fibrosis and chronic kidney diseases,but higher levels of HCV *** SVR12 rate was comparable between the HCV microelimination and control groups,95.8%(203/212)vs 94.5%(86/91),respectively,in intent-to-treat analysis,and 100%(203/203)vs 98.9%(86/87),respectively,in perprotocol *** was no virological failure,treatment discontinuation,and serious adverse event among sofosbuvir/velpatasvir-treated patients in the HCV micro-elimination *** Outreach mass screening followed by immediate onsite treatment with a simplified pange

关键词： Direct-acting antivirals Sofosbuvir Velpatasvir People who inject drugs Universal screen

High-dimensional large-scale mixed-type data imputation under missing at random

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Mathematics 2025年

作者： wei liu Guizhen Li Ling Zhou Lan Luo School of Mathematics Sichuan University Center of Statistical Research and School of Statistics Southwestern University of Finance and Economics Department of Statistics and Actuarial Science University of Iowa

Missingness in mixed-type variables is commonly encountered in a variety of areas. The requirement of complete observations necessities data imputation when a moderate or large proportion of data is ***, inappropriate imputation would downgrade the performance of machine learning algorithms, leading to bad predictions and unreliable statistical inference. For high-dimensional large-scale mixed-type missing data, we develop a computationally efficient imputation method, missing value imputation via generalized factor models（MIG）, under missing at random. The proposed MIG method allows missing variables to be of different types,including continuous, binary, and count variables, and are scalable to both data size n and variable dimension p while existing imputation methods rely on restrictive assumptions such as the same type of missing variables,the low dimensionality of variables, and a limited sample size. We explicitly show that the imputation error of the proposed MIG method diminishes to zero with the rate Op(max{n-1/2, p-1/2}) as both n and p tend to infinity. Five real datasets demonstrate the superior empirical performance of the proposed MIG method over existing methods that the average normalized absolute imputation error is reduced by 5.3%–34.1%.

关键词：

Dynamics of cytokines predicts risk of hepatocellular carcinoma among chronic hepatitis C patients after viral eradication

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2022年第1期28卷 140-153页

作者： Ming-Ying Lu Ming-Lun Yeh Ching-I Huang Shu-Chi Wang Yi-Shan Tsai Pei-Chien Tsai Yu-Min Ko Ching-Chih Lin Kuan-Yu Chen Yu-Ju wei Po-Yao Hsu Cheng-Ting Hsu Tyng-Yuan Jang ta-wei liu Po-Cheng Liang Ming-Yen Hsieh Zu-Yau Lin Shinn-Cherng Chen Chung-Feng Huang Jee-Fu Huang Chia-Yen Dai Wan-Long Chuang Ming-Lung Yu Hepatitis Center and Hepatobiliary Division Department of Internal MedicineKaohsiung Medical University HospitalKaohsiung 80708Taiwan School of Medicine and Hepatitis Research Center College of MedicineCenter for Cancer Research and Center for Liquid BiopsyKaohsiung Medical UniversityKaohsiung 80708Taiwan Department of Medical Laboratory Science and Biotechnology Kaohsiung Medical UniversityKaohsiung 80708Taiwan Health Management Center Department of Community MedicineKaohsiung Medical University HospitalKaohsiung 80708Taiwan Institute of Biomedical Sciences National Sun Yat-Sen UniversityKaohsiung 80708Taiwan

BACKGROUND Chronic hepatitis C virus(HCV)infection induces profound alterations in the cytokine and chemokine signatures in peripheral *** of HCV by antivirals results in host immune modification,which may interfere with immune-mediated cancer *** HCV patients who remain at risk of hepatocellular carcinoma(HCC)following HCV eradication remains an unmet *** hypothesized that antiviral therapy-induced immune reconstruction may be relevant to HCC *** To investigate the impact of differential dynamics of cytokine expression on the development of HCC following successful antiviral *** One hundred treatment-naïve HCV patients with advanced fibrosis(F3/4)treated with direct-acting antivirals(DAAs)or peginterferon/ribavirin who achieved sustained virologic response[SVR,defined as undetectable HCV RNA throughout 12 wk(SVR12)for the DAA group or 24 wk(SVR24)for the interferon group after completion of antiviral therapy]were enrolled since *** primary endpoint was the development of new-onset *** HCC surveillance(abdominal ultrasound andα-fetoprotein)was performed every six months during the ***,64 serum cytokines were detected by the multiplex immunoassay at baseline and 24 wk after *** HCC developed in 12 of the 97 patients over 459 person-years after HCV *** univariate analysis,the Fibrosis-4 index(FIB-4),hemoglobin A1c(HbA1c),the dynamics of tumor necrosis factor-α(TNF-α),and TNF-like weak inducer of apoptosis(TWEAK)after antiviral therapy were significant HCC *** multivariate Cox regression model showed thatΔTNF-α(≤-5.7 pg/mL)was the most important risk factor for HCC(HR=11.54,95%CI:2.27-58.72,P=0.003 in overall cases;HR=9.98,95%CI:1.88-52.87,P=0.007 in the interferon group).An HCC predictive model comprising FIB-4,HbA1c,ΔTNF-α,andΔTWEAK had excellent performance,with 3-,5-,10-,and 13-year areas under the curve of 0.882,0.864,0.903,and 1.000,r

关键词： Hepatitis C virus Hepatocellular carcinoma Sustained virologic response Tumor necrosis factor-α Tumor necrosis factor-like weak inducer of apoptosis Cytokine

Gut microbiota-astrocyte axis: new insights into age-related cognitive decline

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第4期20卷 990-1008页

作者： Lan Zhang Jingge wei Xilei liu Dai Li Xiaoqi Pang Fanglian Chen Hailong Cao Ping Lei Haihe Laboratory of Cell Ecosystem Department of GeriatricsTianjin Medical University General HospitalTianjinChina Tianjin Geriatrics Institute Tianjin Medical University General HospitalTianjinChina Department of Gastroenterology and Hepatology Tianjin Medical University General HospitalNational Key Clinical SpecialtyTianjin Institute of Digestive DiseasesTianjin Key Laboratory of Digestive DiseasesTianjinChina Department of Urology Tianjin Medical University General HospitalTianjinChina Tianjin Neurological Institution Tianjin Medical University General HospitalTianjinChina

With the rapidly aging human population,age-related cognitive decline and dementia are becoming increasingly prevalent *** is considered the main risk factor for cognitive decline and acts through alterations in the composition of the gut microbiota,microbial metabolites,and the functions of *** microbiota–gut–brain axis has been the focus of multiple studies and is closely associated with cognitive *** article provides a comprehensive review of the specific changes that occur in the composition of the gut microbiota and microbial metabolites in older individuals and discusses how the aging of astrocytes and reactive astrocytosis are closely related to age-related cognitive decline and neurodegenerative *** article also summarizes the gut microbiota components that affect astrocyte function,mainly through the vagus nerve,immune responses,circadian rhythms,and microbial ***,this article summarizes the mechanism by which the gut microbiota–astrocyte axis plays a role in Alzheimer’s and Parkinson’s *** findings have revealed the critical role of the microbiota–astrocyte axis in age-related cognitive decline,aiding in a deeper understanding of potential gut microbiome-based adjuvant therapy strategies for this condition.

关键词： age aging Alzheimer’s disease astrocytes cognitive decline dementia gut microbiota gut–brain axis microbial metabolites neuroinflammation Parkinson’s disease