检索结果-南通市图书馆

Virologica Sinica 2021年第6期36卷 1503-1519页

作者： Shengda Xie Zhenjie Liang xingmiao yang Junhui Pan Du Yu Tongtong Li Ruibing Cao MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary MedicineNanjing Agricultural UniversityNanjing210095China

Japanese encephalitis virus(JEV) is a flavivirus transmitted by mosquitoes that causes severe encephalitis in humans and animals. It has been suggested that AXL, a transmembrane protein, can promote the replication of various flaviviruses,such as dengue(DENV), Zika(ZIKV), and West Nile(WNV) viruses. However, the effect of AXL on JEV infection has not yet been determined. In the present study, we demonstrate that AXL is down-regulated after JEV infection in the late stage. JEV NS2B-3 protein specifically interacted with AXL, and promoted AXL degradation through the ubiquitin–proteasome pathway. AXL-degradation increased cell apoptosis by disrupting phosphatidylinositol 3-kinase(PI3 K)/Akt signal transduction. In addition, the degradation of AXL promoted JEV release to supernatant, whereas the virus in the cell lysates decreased. The supplementation of AXL ligand Gas6 inhibited the JEV-mediated degradation of AXL. Altogether,we discover a new function of NS2B-3 during the process of JEV replication, and provide a new insight into the interactions between JEV and cell hosts.

关键词： Japanese encephalitis virus(JEV) AXL NS2B-3 Cell apoptosis Virus release

C19orf66 Inhibits Japanese Encephalitis Virus Replication by Targeting-1 PRF and the NS3 Protein

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2021年第6期36卷 1443-1455页

作者： Du Yu Yundi Zhao Junhui Pan xingmiao yang Zhenjie Liang Shengda Xie Ruibing Cao MOE Joint International Research Laboratory of Animal Health and Food Safety College of Veterinary MedicineNanjing Agricultural UniversityNanjing 210095China

The Japanese encephalitis serogroup of the neurogenic Flavivirus has a specific feature that expresses a non-structural protein NS1'produced through a programmed-1 ribosomal frameshifting(-1 PRF).Herein,C19orf66,a novel member of interferon-stimulated gene(ISG)products,exhibited significant activity of antagonizing Japanese encephalitis virus(JEV)*** of C19orf66 in 293T cells significantly inhibited JEV replication,while knock-down of endogenous C19orf66 in HeLa cells and A549 cells significantly increased virus ***,C19orf66 had an inhibitory effect on frameshift production of JEV NS1'.The inhibition was more significant when C19orf66 and JEV NS1-NS2A were co-expressed in the 293T *** C19orf66-209 and C19orf66-Zinc^(mut) did not significantly change the NS1'to NS1 ratio and had weaker antiviral effects than ***,C19orf66-209 and C19orf66-Zinc^(mut) had no significant effect on the expression of the JEV NS3 protein,whose expression was down-regulated by C19orf66 via the lysosome-dependent *** findings suggest that C19orf66 may possess at least two different mechanisms of antagonizing JEV *** study identified C19orf66 as a novel interferon-stimulated gene product that can inhibit JEV replication by targeting-1 PRF and the NS3 *** study provides baseline information for the future development of broad-spectrum antiviral agents against JEV.

关键词： Japanese encephalitis virus(JEV) C19orf66 Programmed-1 ribosomal frameshifting(-1 PRF) NS1’ NS3

日本脑炎病毒sfRNA靶向PKR和IFITM2的翻译抑制细胞干扰素应答

在线全文

学校读者我要写书评

暂无评论

中国动物传染病学报 2022年第3期30卷 29-39页

作者：杨兴淼徐昊曹瑞兵南京农业大学动物医学院南京210095

本研究旨在探究日本脑炎病毒(JEV)感染细胞后产生非编码亚基因组RNA(sfRNA)的生物学功能。应用Northern blot检测JEV感染细胞产生sfRNA的动态特征;通过Western blot和qPCR检测JEV感染细胞中PKR、IFITM2等干扰素刺激基因的表达;通过体外... 详细信息

本研究旨在探究日本脑炎病毒(JEV)感染细胞后产生非编码亚基因组RNA(sfRNA)的生物学功能。应用Northern blot检测JEV感染细胞产生sfRNA的动态特征;通过Western blot和qPCR检测JEV感染细胞中PKR、IFITM2等干扰素刺激基因的表达;通过体外转录制备JEV sfRNA,转染细胞研究其功能。实验结果表明:JEV感染Huh7细胞后期可下调PKR、IFITM2的表达,与sfRNA产生的时间规律一致;将体外转录制备的JEV sfRNA转染细胞后可下调IFN-α刺激细胞中IFITM2、PKR蛋白的含量,但其mRNA水平与对照组差异不显著,推测JEV sfRNA抑制其翻译过程;SL-Ⅱ区域缺失的JEV sfRNA不能有效下调干扰素诱导细胞中IFITM2和PKR蛋白的表达。因此,本研究发现JEV sfRNA在翻译阶段抑制PKR和IFITM2蛋白的表达,为病毒增殖营造有利环境。

关键词：日本脑炎病毒 sfRNA ISG PKR IFITM2

维普期刊数据库博看期刊

基因Ⅰ型和Ⅲ型日本脑炎病毒sfRNA亚型鉴定及遗传演化分析

在线全文

学校读者我要写书评

暂无评论

畜牧与兽医 2020年第9期52卷 67-73页

作者：杨兴淼徐昊曹瑞兵南京农业大学动物医学院江苏南京210095

旨在探究基因Ⅰ型和Ⅲ型日本脑炎病毒(Japanese encephalitis virus,JEV)感染细胞产生的黄病毒亚基因组RNA(subgenomic flaviviral RNA,sfRNA)亚型与演化趋势。应用高分辨率Northern blot检测Ⅰ型和Ⅲ型JEV感染细胞产生sfRNA亚型特征;... 详细信息

旨在探究基因Ⅰ型和Ⅲ型日本脑炎病毒(Japanese encephalitis virus,JEV)感染细胞产生的黄病毒亚基因组RNA(subgenomic flaviviral RNA,sfRNA)亚型与演化趋势。应用高分辨率Northern blot检测Ⅰ型和Ⅲ型JEV感染细胞产生sfRNA亚型特征;对美国国立生物技术信息中心(NCBI)收录的99条JEV sfRNA序列通过Mega X软件进行多序列比对及遗传演化分析,用Megalign软件进行核苷酸相似性比较及变异分析。结果表明:Ⅰ型和Ⅲ型JEV感染细胞产生特征相似的4种亚型sfRNA;JEV sfRNA序列10440、10673、10853位核苷酸差异具有基因型特异性(位点说明以JEV HEN0701为例,GenBank:FJ495189.1);Ⅰ型10477位核苷酸的变化相较于Ⅲ型更有利于sfRNA PK1结构的碱基配对;Ⅰ型和Ⅲ型sfRNA组间核苷酸序列相似性为79.2%~100%,Ⅰ型sfRNA组内核苷酸序列相似性为81.6%~100%,Ⅲ型sfRNA组内核苷酸序列相似性为85.6%~100%;Ⅰ型和Ⅲ型sfRNA核苷酸变异以碱基转换为主。本研究发现JEV sfRNA存在一定差异,但同种基因型sfRNA遗传距离接近,结果为揭示JEV基因型差异提供了新思路。

关键词：日本脑炎病毒基因型亚基因组RNA(sfRNA) 亚型

鸭坦布苏病毒prM蛋白单克隆抗体的制备及其抗原表位鉴定

在线全文

学校读者我要写书评

暂无评论

畜牧与兽医 2024年第1期56卷 98-106页

作者：刘亚林梁真洁杨兴淼曹瑞兵南京农业大学动物医学院江苏南京210095

为制备鸭坦布苏病毒(DTMUV)膜前体蛋白(prM)的单克隆抗体,将原核表达的重组prM蛋白配伍佐剂免疫6周龄雌性BALB/c小鼠,3次免疫后分离小鼠脾细胞并将其与SP2/0细胞进行融合,通过间接ELISA筛选,获得2株能稳定分泌抗DTMUV prM蛋白单克隆抗... 详细信息

为制备鸭坦布苏病毒(DTMUV)膜前体蛋白(prM)的单克隆抗体,将原核表达的重组prM蛋白配伍佐剂免疫6周龄雌性BALB/c小鼠,3次免疫后分离小鼠脾细胞并将其与SP2/0细胞进行融合,通过间接ELISA筛选,获得2株能稳定分泌抗DTMUV prM蛋白单克隆抗体的杂交瘤细胞株,命名为3H4和5C10。2株杂交瘤细胞均能稳定分泌抗体,制备的腹水抗体效价分别为1∶51200和1∶102400。亚型鉴定结果显示,3H4和5C10单克隆抗体的重链均属于IgG2b,轻链均为Kappa型。Western blot和间接免疫荧光试验结果显示,这2株单克隆抗体均能与BHK-21细胞中感染的DTMUV发生特异性反应,而与同属的日本脑炎病毒无交叉反应。微量病毒空斑减少中和试验结果表明,这2株单克隆抗体均具有中和活性。进一步原核表达prM蛋白不同截短体,发现2株单抗针对不同表位,均位于prM蛋白的pr片段上。本研究制备的单克隆抗体3H4和5C10为快速检测DTMUV感染和研究prM蛋白的结构与功能奠定了基础。

关键词：鸭坦布苏病毒 prM蛋白原核表达单克隆抗体 B细胞表位

维普期刊数据库博看期刊

Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

在线全文

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期68卷 144-151页

作者： Yunhan yang Han Jia Tuo Liu Yuzhen yang Jun yang Key Laboratory of Noise and Vibration Research Institute of AcousticsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Acoustics Institute of AcousticsChinese Academy of SciencesBeijing 100190China

The phenomenon of induced transparency,characterized by a high quality(Q)factor,holds significant importance in the fields of high-precision sensing,energy storage and wave *** transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters,thereby hindering advanced research on high-Q *** we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection *** virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom,we achieve the manipulation of induced transparency in a decoupled,wide-ranging,and elaborate *** the diverse evolutions across the intrinsic parameter space,we show experimentally a counter-intuitive increase in the Q-factor of the transparency window,which is attributed to the enhanced dissipation of the bright ***,a constant group delay at the center frequency is observed accompanying this *** work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon,and paves the way towards applications in programmable acoustic sensors,filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter

鸭圆环病毒实时定量PCR检测方法的建立及流行毒株全基因组遗传变异分析

在线全文

学校读者我要写书评

暂无评论

畜牧与兽医 2022年第12期54卷 98-105页

作者：赵韵笛杨兴淼李靖红曹瑞兵南京农业大学动物医学院江苏南京210095

为了解近年来鸭圆环病毒(duck circovirus,DuCV)的流行现状,本研究在DuCV的Rep基因保守区内设计一对特异性荧光定量引物,建立SYBR Green I实时荧光定量PCR检测方法。结果显示:该方法最低可检测到拷贝数为3.46×10^(1)copies/μL的目的基... 详细信息

为了解近年来鸭圆环病毒(duck circovirus,DuCV)的流行现状,本研究在DuCV的Rep基因保守区内设计一对特异性荧光定量引物,建立SYBR Green I实时荧光定量PCR检测方法。结果显示:该方法最低可检测到拷贝数为3.46×10^(1)copies/μL的目的基因,比常规PCR灵敏;选取Ct值最低的阳性样品进行全基因组扩增及进化分析,成功扩增出1988 bp的病毒全基因,序列分析结果显示该病毒基因型为DuCV-1,亚型为1 b。本研究建立的实时荧光定量PCR检测方法为DuCV的流行病学调查提供了有效的监测手段,同时通过分析不同基因型的遗传进化特点与Cap蛋白氨基酸位点突变特征,为DuCV感染的防控研究提供参考。

关键词：鸭圆环病毒基因进化定量PCR 检测

日本脑炎病毒NS1蛋白致脑血管内皮细胞损伤研究

在线全文

学校读者我要写书评

暂无评论

南京农业大学学报 2023年第6期46卷 1107-1115页

作者：潘俊慧刘亚林梁真洁杨兴淼谢盛达曹瑞兵南京农业大学动物医学院江苏南京210095

[目的]本试验旨在探究日本脑炎病毒(Japanese encephalitis virus, JEV)非结构蛋白NS1的生物学功能。[方法]将JEV NS1基因克隆到pFastbac1载体并将其转化至感受态DH10Bac得到重组杆粒,将重组杆粒转染sf9细胞产生重组杆状病毒,通过病毒感... 详细信息

[目的]本试验旨在探究日本脑炎病毒(Japanese encephalitis virus, JEV)非结构蛋白NS1的生物学功能。[方法]将JEV NS1基因克隆到pFastbac1载体并将其转化至感受态DH10Bac得到重组杆粒,将重组杆粒转染sf9细胞产生重组杆状病毒,通过病毒感染High5细胞成功表达了JEV NS1。在人脑微血管内皮细胞(HBMEC)培养液添加外源NS1蛋白,通过光学显微镜观察细胞形态,利用共聚焦显微镜观察JEV NS1蛋白对HBMEC表面唾液酸修饰的影响,IFA检测细胞中组织蛋白酶L的表达;小鼠经尾静脉注射JEV NS1及其N207糖基化位点突变体蛋白NS1 N207Q,分别于24、48和72 h通过伊文思蓝(EB)染色检测2个蛋白对小鼠的血脑屏障(BBB)通透性的影响。[结果]JEV NS1蛋白通过下调人脑内皮细胞表面的唾液酸修饰和上调组织蛋白酶L表达损伤内皮糖萼;动物试验表明NS1蛋白能够破坏小鼠的血脑屏障;NS1 N207Q蛋白处理对细胞表面唾液酸修饰的影响不显著,体内处理对小鼠的血脑屏障无明显损伤。[结论]JEV NS1蛋白具有损伤人脑微血管内皮细胞的生物学功能,突变N207位点可导致其损伤功能减弱,可为JEV亚单位疫苗候选抗原的优化提供新思路。

关键词：日本脑炎病毒 NS1蛋白唾液酸修饰组织蛋白酶L 脑血管内皮损伤 N207Q突变

维普期刊数据库博看期刊

Rapid reduction of air pollution and short-term exposure risks in China

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第3期149卷 126-138页

作者： Hao Fan Chuanfeng Zhao Yikun yang Xingchuan yang State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing 100875China Laboratory for Climate and Ocean-Atmospheric Studies Department of Atmospheric and Oceanic SciencesSchool of PhysicsPeking UniversityBeijing 100871China College of Resource Environment and Tourism Capital Normal UniversityBeijing 100048China

With the continuous control of anthropogenic emissions,China’s air quality has improved significantly in recent *** this background,research on how the short-term exposure risks caused by air pollution in China have changed is *** study utilized hourly concentration data from ground observation stations and the official air quality guidelines of the Ministry of Ecology and Environment of China and the World Health Organization as standards to systematically investigate the spatiotemporal characteristics and short-term exposure risks of air pollution in China from 2015 to *** results indicate that various atmospheric pollutants except for ozone showed a decreasing trend ***,both single pollutant air pollution days(SAPDs)and multiple pollutant air pollution days(MAPDs)showed varying degrees of reduction within 15 and 25 days,*** was dominated mainly by excessive PM_(2.5)and PM_(10)pollutants,while MAPD was dominated mainly by excessive pollutant combinations,including PM_(2.5)+PM_(10),CO+PM_(2.5)+PM_(10),and SO_(2)+PM_(2.5)+PM_(10).As the concentration of atmospheric pollutants decreased,the total excess risk(ER)decreased yearly from 2015 to 2022,but there were significant regional ***,the ER is less than 0.25%in southern China,in the range of 0.25%-0.5%in the North China Plain and some cities in the northeast,and higher than 1%in the *** matter is currently the primary pollutant posing short-term exposure risk in China,especially due to the impact of sandstorm *** study indicates that China’s atmospheric cleaning action is significantly beneficial for reducing health risks.

关键词： Air pollution Emission-reduction Total excess risk Particulate matter China

Engineering strategies of biomaterial-assisted exosomes for skin wound repair:Latest advances and challenges

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2025年第1期36卷 99-109页

作者： yang Xu Le Ma yang Wang Chunmeng Shi Institute of Rocket Force Medicine State Key Laboratory of Trauma and Chemical PoisoningThird Military Medical University(Army Medical University)Chongqing 400038China

The treatment of skin wounds,especially chronic wounds,remains a critical clinical challenge and places a heavy burden on patients and healthcare *** recent years,the engineering strategy of using biomaterial-assisted exosomes has emerged as a powerful tool for skin *** to treatments such as debridement and regular dressing changes,the design of biomaterial-assisted exosomes not only maintains the bioactivity of exosomes at the wound site but also provides an appropriate microenvironment for the repair of complex tissues,thereby accelerating wound *** review systematically introduces the general characteristics of exosomes and their functions in skin wound healing,highlights recent advances in classification of natural exosomes and engineering methods which enriching their functions in intercellular ***,various emerging and innovative approaches based on biomaterials delivery of exosomes are comprehensively *** review seeks to bring an in-depth understanding of bioactive dressings based on exosomes therapeutic strategies,aiming to facilitate new clinical application value.

关键词： Exosomes Biomaterials Hydrogel Delivery system Wound healing