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Japanese Encephalitis Virus NS2B-3 Protein Complex Promotes Cell Apoptosis and Viral Particle Release by Down-Regulating the Expression of AXL

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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

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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

Micelle-directed self-assembly of single-crystal-like mesoporous stoichiometric oxides for high-performance lithium storage

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National Science Review 2024年第4期11卷 195-205页

作者： Yanhua Wan Changyao Wang xingmiao Zhang yang Yin Mengmeng Liu Bing Ma Linlin Duan Yuzhu Ma Wei Zhang Changlin Zheng Dongliang Chao Fei Wang Yongyao Xia Wei Li Department of Chemistry Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials State Key Laboratory of Molecular Engineering of Polymers College of Chemistry and Materials ScienceFudan University State Key Laboratory of Surface Physics and Department of Physics Fudan University

Due to their uncontrollable assembly and crystallization process,the synthesis of mesoporous metal oxide single crystals remains a formidable ***,we report the synthesis of single-crystal-like mesoporous Li2TiSiO5by using soft micelles as *** key lies in the atomic-scale self-assembly and step-crystallization processes,which ensure the formation of single-crystal-like mesoporous Li2TiSiO5microparticles via an oriented attachment growth mechanism under the confinement of an in-situ formed carbon *** mesoporous Li2TiSiO5anode achieves a superior rate capability(148 mAh g-1at5.0 A g-1) and outstanding long-term cycling stability(138 mAh g-1after 3000 cycles at 2.0 A g-1) for lithium storage as a result of the ultrafast Li+diffusion caused by penetrating mesochannels and nanosized crystal frameworks（5-10 nm）.In comparison,bulk Li2TiSiO5exhibits poor rate capability and cycle performance due to micron-scale diffusion *** method is very simple and reproducible,heralding a new way of designing and synthesizing mesoporous single crystals with controllable frameworks and chemical functionalities.

关键词： mesoporous materials micelles single-crystal-like Li2TiSiO5 lithium-ion batteries

日本脑炎病毒sfRNA靶向PKR和IFITM2的翻译抑制细胞干扰素应答

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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

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

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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

Vibration properties of Paulownia wood for Ruan sound quality using machine learning methods

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Journal of Forestry Research 2024年第5期35卷 216-222页

作者： yang yang College of Art and Design Harbin UniversityHarbin 150076People’s Republic of China College of Mechanical and Electrical Engineering Northeast Forestry UniversityHarbin 150040People’s Republic of China

As an important material for manufacturing resonant components of musical instruments,Paulownia has an important influence on the sound quality of *** this paper,a model for evaluating the sound quality of Ruan based on the vibration characteristics of wood is developed using machine learning ***,the selection of materials for Ruan manufacturing relies primarily on manually weighing,observing,striking,and listening by the instrument *** in scientific theory have hindered the quality of the finished *** this study,nine Ruans were manufactured,and a prediction model of Ruan sound quality was proposed based on the raw material information of *** of a total of 180 data sets,145 and 45 sets were chosen for training and validation,*** this paper,typical correlation analysis was used to determine the correlation between two single indicators in two adjacent pairwise combinations of the measured objects in each stage of the production process in *** vibra-tion characteristics of the wood were tested,and a model for predicting the evaluation of Ruan’s acoustic qualities was developed by measuring the vibration characteristics of the resonating plate *** acoustic quality of the Ruan sound board wood was evaluated and predicted using machine learning model generalized regression neural *** results show that the prediction of Ruan sound quality can be achieved using Matlab simulation based on the vibration characteristics of the soundboard *** the model-predicted values were compared with the tradi-tional predicted results,it was found that the generalized regression neural network had good performance,achieving an accuracy of 93.8%which was highly consistent with the experimental *** was concluded that the model can accurately predict the acoustic quality of the Ruan based on the vibration performance of the soundboards.

关键词： Sound quality Wood vibration performance Paulownia wood Machine learning methods

Overview of radar detection methods for low altitude targets in marine environments

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Journal of Systems Engineering and Electronics 2024年第1期35卷 1-13页

作者： yang Yong yang Boyu School of Electronic Science National University of Defense TechnologyChangsha 410073China

In this paper,a comprehensive overview of radar detection methods for low-altitude targets in maritime environments is presented,focusing on the challenges posed by sea clutter and multipath *** performance of the radar detection methods under sea clutter,multipath,and combined conditions is categorized and summarized,and future research directions are outlined to enhance radar detection performance for low-altitude targets in maritime environments.

关键词： radar sea clutter multipath scattering detection low altitude target

Fresh-Keeping Decision and Coordination of Fresh Agricultural Product Supply Chain Considering Carbon Cap-and-Trade under Different Dominance

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Journal of Systems Science and Systems Engineering 2024年第1期33卷 30-51页

作者： yang yang Guanxin Yao China Institute for Agricultural Equipment Industrial Development Jiangsu UniversityZhenjiang212013China Jiangsu Modern Logistics Research Base Yangzhou UniversityYangzhou225009China

In the context of low carbon,this paper discussed the impact of the carbon cap-and-trade policy on the fresh-keeping decision-making of two-echelon fresh agricultural product supply chains under different dominance,and designed cost-sharing contracts to coordinate the supply chain of fresh agricultural products dominated by suppliers and retailers *** results showed that:dominance has no effect on the fresh-keeping decision and total revenue of fresh agricultural product supply chain,but it affects the internal income distribution,and dominance does not always bring more benefits;the implementation of carbon cap-and-trade reduces the fresh-keeping decision-making of fresh agricultural products supply chain and reduces the free-rider income of followers;the role of higher carbon trading price is twofold,which not only brings about the speculation of leading enterprises,but also promotes the application of low-carbon technologies;consumers’high preference for freshness,low-cost and high-efficiency low-carbon technology are all conducive to improving the fresh-keeping efforts and benefits of the supply chain;cost-sharing contracts can coordinate the supply chain of fresh agricultural products.

关键词： Dominant power carbon cap-and-trade policy fresh agricultural product supply chain fresh-keeping decision-making

Selective nano-buckling improves the performance of graphene logic transistors

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National Science Review 2024年第2期11卷 95-96页

作者： Tong yang Ming yang Department of Applied Physics The Hong Kong Polytechnic University Research Centre for Nanoscience and Nanotechnology The Hong Kong Polytechnic University

The massive integration of silicon-based transistors into modern electronic devices greatly increases power consumption and heat generation/dissipation[1]. In this concern, transistors based on atomically-thin graphene that exhibit high electric and thermoelectric conductivities with negligible contact resistance,

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