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杨正时 《中国微生态学杂志》2016,(12)
寨卡病毒是蚊源性虫媒病毒,归属于黄病毒科黄病毒属。1947年在乌干达寨卡森林的一头哨猴(恒河猴)中首次分离到。上世纪60年代在亚洲和非洲报告有散发性病例。2007年,在密克罗尼西亚雅浦岛发生以发热与皮疹为特征的第一次大流行;2013年10月在法属波利尼西亚发生了南太平洋最大的寨卡病毒爆发流行;在2015年引入巴西的寨卡病毒引起爆发。迄今,巴西已有150万人感染,并扩展到世界上30多个国家,大多数在南美洲。由于在巴西不正常地密集出现新生儿小头畸形,而母亲在孕期曾感染过寨卡病毒,因此世界卫生组织宣布世界范围内流行的寨卡病毒是国际关注的突发公共卫生事件。寨卡病毒感染是酷似登革热的、自限性的发热、皮疹、关节痛综合征,我国称寨卡病毒病。大多数病例是轻症,主要症状是皮疹、发热、关节痛、肌痛、头痛和结膜炎。寨卡病毒自然传播中的媒介为伊蚊,但也存在非生物媒介传播的危险。曾从血清中分离到寨卡病毒,并证实性交传播。最近有更多的由性传播的病例报告。寨卡病毒由病毒携带的男性经性行为传染给女方。如果最近刚从寨卡病毒流行区来的男性,在性生活中应使用安全套;如果女方已经怀孕,最好是放弃性接触,以保护胎儿。 相似文献
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寨卡病毒病是近年来在非洲、亚洲、南美洲等地流行的一种隐性传染病.该病由寨卡病毒(Zika virus,ZIKV)感染导致,虽然患者或携带者的病情并不明显,或在短期内很难察觉.但由于近些年来的突然流行,患者数目的 急剧增加,而且各国间贸易往来愈加繁荣,亦加快了该疾病流行的步伐.疾病的防治离不开确切的诊断,如何快速、准确检测出寨卡病毒不容小觑,是急需解决的世界性难题之一. 相似文献
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寨卡病毒感染与小头畸形和神经系统并发症紧密相关,甚至可能损伤男性生殖系统,引起了全球性的关注,研究其结构和致病机制以及开发有效的诊断治疗方法成为当务之急。寨卡病毒的非结构蛋白NS1是病毒与宿主相互作用的重要蛋白,在病毒复制、发病机制及免疫逃逸中起着关键作用。本文总结了寨卡病毒NS1的空间精细结构,并将其与其它黄病毒NS1进行比较。本文也分析了寨卡病毒基于NS1的致病机理,总结了NS1在疾病诊断中的应用。 相似文献
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寨卡病毒(Zika virus,ZIKV)作为一种新出现的蚊媒病原体,与成人格林-巴利综合征(Guillain–Barré syndrome,GBS)、新生儿小头畸形以及神经系统缺陷等疾病有关。2016年世界卫生组织将寨卡疫情列为国际关注的公共卫生突发事件,近年来关于ZIKV病原学、流行病学、感染与致病、抗病毒免疫应答、疫苗与药物的研究越来越多,为有效防控该病提供了理论依据和具体实践。本文就ZIKV蛋白组成及相应功能、感染周期、ZIKV受体及ZIKV-宿主相互作用等的最新研究进展进行综述,旨在正确认识和深入理解ZIKV致病与机体抗病相关机制,为设计有效的预防或治疗疫苗或药物提供参考资料。 相似文献
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为研究寨卡病毒(ZIKV)感染者血清、尿液和唾液样本中特异性IgA抗体水平,进一步了解ZIKV感染免疫机制,本研究重组表达制备寨卡病毒NS1蛋白,对其浓度、纯度进行鉴定,初步评估了NS1蛋白抗原性,并建立间接酶联免疫(Indirect-ELISA)方法,检测患者临床血清、尿液和唾液样本中的寨卡特异性IgA抗体。利用健康人群血清、尿液和唾液标本,评估检测方法的特异性,并确定以阴性对照的均值加3倍标准差作为判定检测结果的阈值,特异性为100%。对经病毒核酸检测所确诊病例的33份血清样本、4份尿液样本和3份唾液样本进行检测。选择3份具有较高IgA抗体水平的血清,通过2倍系列稀释的方法评价了血清样本中特异性IgA抗体的滴度,可有效检出经3 200倍以上稀释的血清样本中的IgA抗体。重复性检测实验显示板间变异系数为(3.0±0.8)%,板内变异系数为(2.7±1.0)%。寨卡患者血清、尿液和唾液样本中的特异性IgA抗体的检出率分别为75.8%(25/33)、100%(4/4)和33.3%(1/3),提示IgA抗体在3种体液标本中均具有显著的存在,具有充当体外诊断指标的意义。同时尿液、唾液标本中特异性IgA抗体的存在,提示潜在的粘膜免疫效应,有助于增强对病毒体内播散和体外传播的理解,也初步提示了寨卡病毒NS1蛋白可用于相关免疫学诊断试剂的研发。 相似文献
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寨卡病毒系由伊蚊传播的黄病毒,超过20亿人在其流行区域生活。近几年,在中南美洲乃至世界范围内爆发的寨卡疫情已对全球公共卫生事业构成严重威胁。已有研究证实寨卡病毒感染为格林巴利综合征的病因之一;孕妇感染寨卡病毒后,可造成新生儿小头症。早日研制出安全有效的寨卡疫苗之重要性不言而喻。全球率先报道的寨卡疫苗为一款DNA疫苗,其在设计、制备和生产方面均较其他类型疫苗更加简易,且可避免可复制型疫苗因毒力回复而造成对孕妇和胎儿的健康威胁,在寨卡疫苗的研究中具有显著优势。其他传统类型疫苗和基于抗体的新型疫苗等均有研究机构开展研究,并已取得阶段性进展,本文将扼要综述寨卡疫苗的研究现状与进展。 相似文献
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Zi-Da Zhen Na Wu Dong-Ying Fan Jun-Hong Ai Zheng-Ran Song Jia-Tong Chang Pei-Gang Wang Yan-Hua Wu Jing An 《中国病毒学》2022,37(4):601-609
As a member of vector-borne viruses, Zika virus (ZIKV) can cause microcephaly and various neurological symptoms in newborns. Previously, we found that ZIKV could infect hypothalamus, causing a decrease in growth hormone (GH) secretion, growth delay and deficits in learning and memory in suckling mice. Early administration of GH can improve the cognitive function of the mice. Therefore, in this study we further investigated the mechanism underlying the protective role of GH in ZIKV infection in suckling mice. Our results showed that GH could effectively reduce brain damage caused by ZIKV infection via reducing cell apoptosis and inflammatory response rather than inhibiting viral replication. Our results provide important evidences not only for understanding the mechanism underlying ZIKV-associated neurological symptoms but also for the treatment of ZIKV infection. 相似文献
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Xugang Wang ;Chaonan Qian ;Chenxi Zhang ;Siyun Hu ;Muhammad Asad ;Chengjie Yang ;Bingrui Liao ;Xiaotong Guo ;Chen Zhang ;Quanzhi Li ;Xinyao Li ;Qiuying Huang ;Youhui Si ;Bibo Zhu ;Shengbo Cao ;Jing Ye 《中国病毒学》2025,40(2):192-205
Zika virus (ZIKV) is a mosquito-borne virus belonging to the genus Orthoflavivirus, and the family Flaviviridae. It commonly presents with febrile-like symptoms, neurological issues, and pregnancy complications in humans. Currently, there is no commercial vaccine or specific treatment available to prevent ZIKV infection. Therefore, controlling the epidemic's spread relies on preventing mosquitoes from transmitting the virus. Although various studies have explored the transmission of ZIKV between mosquitoes and vertebrate hosts, comprehensive research on potential mosquito-to-mosquito transmission of ZIKV remains limited. In this study, we conducted systematic laboratory investigations to assess the ability of ZIKV to spread among mosquitoes, and to evaluate the impact of ZIKV infection on mosquito development. Our findings revealed that ZIKV can be transmitted between Aedes aegypti mosquitoes both vertically and horizontally, through oviposition and contact between mosquitoes of the same or opposite sex. Additionally, we observed that ZIKV infection resulted in a reduction in the number of mosquito eggs but an increase in their size. The widespread distribution of ZIKV in infected mosquitoes and the altered levels of hormone related genes following viral infection were noted, which may contribute to viral transmission among mosquitoes and affect mosquito development. This research provides systematic experimental evidence of ZIKV transmission among mosquitoes, which is crucial for developing novel strategies to disrupt the spread of orthoflaviviruses and other mosquito-borne pathogens. 相似文献
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Zifang Shang Hao Song Yi Shi Jianxun Qi George F. Gao 《Journal of molecular biology》2018,430(7):948-962
Recently, Zika virus (ZIKV) emerged as a global public health concern and is distinct from other flaviviruses in many aspects, for example, causing transplacental infection, fetal abnormalities and vector-independent transmission through body fluids in humans. The capsid (C) protein is a multifunctional protein, since it binds to viral RNA in the process of nucleocapsid assembly and plays important roles in virus infection processes by interacting with cellular proteins, modulating cellular metabolism, apoptosis and immune response. Here we solved the crystal structure of ZIKV C protein at a resolution of 1.9 Å. The ZIKV C protein structure contains four α helices with a long pre-α1 loop and forms dimers. The unique long pre-α1 loop in ZIKV C contributes to the tighter association of dimeric assembly and renders a divergent hydrophobic feature at the lipid bilayer interface in comparison with the known C structures of West Nile and dengue viruses. We reported the interaction between the ZIKV C protein and lipid droplets through confocal microscopy analysis. Substitutions of key amino acids in the pre-α1 loop of ZIKV C disrupted the interaction with lipid droplets, indicating that the loop is critical for membrane association. We also recognized that ZIKV C protein possesses broad binding capability to different nucleotide types, including single-stranded and double-stranded RNAs or DNAs. Furthermore, the highly positively charged interface, mainly formed by α4 helix, is proposed to be responsible for nucleotide binding. These findings will greatly enhance our understanding of ZIKV C protein, providing information for anti-ZIKV drug design targeting the C protein. 相似文献
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Shili Zhou Quanshi Lin Changbai Huang Xiaotong Luo Xu Tian Chao Liu Ping Zhang 《中国病毒学》2022,37(5):685-694
Infection of Zika virus (ZIKV) may cause microcephaly and other neurological disorders, while no vaccines and drugs are available. Our study revealed that rottlerin confers a broad antiviral activity against several enveloped viruses, including ZIKV, vesicular stomatitis virus, and herpes simplex virus, but not against two naked viruses (enterovirus 71 and encephalomyocarditis virus). Rottlerin does not have a direct virucidal effect on the virions, and its antiviral effect is independent of its regulation on PKCδ or ATP. Both pretreatment and post-treatment of rottlerin effectively reduce the viral replication of ZIKV. The pretreatment of rottlerin disturbs the endocytosis of enveloped viruses, while the post-treatment of rottlerin acts at a late stage through disturbing the maturation of ZIKV. Importantly, administration of rottlerin in neonatal mice significantly decreased the ZIKV replication in vivo, and alleviated the neurological symptoms caused by ZIKV. Our work suggests that rottlerin exerts an antiviral activity at two distinct steps of viral infection, and can be potentially developed as a prophylactic and therapeutic agent. 相似文献
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Pushpendra Mani Mishra Vladimir N. Uversky Rajanish Giri 《Journal of molecular biology》2018,430(16):2372-2388
Viruses have compact genomes that encode limited number of proteins in comparison to other biological entities. Interestingly, viral proteins have shown natural abundance of either completely disordered proteins that are recognized as intrinsically disorder proteins (IDPs) or partially disordered segments known as intrinsically disordered protein regions (IDPRs). IDPRs are involved in interactions with multiple binding partners to accomplish signaling, regulation, and control functions in cells. Tuning of IDPs and IDPRs are mediated through post-translational modification and alternative splicing. Often, the interactions of IDPRs with their binding protein partner(s) lead to transition from the state of disorder to ordered form. Such interaction-prone protein IDPRs are identified as molecular recognition features (MoRFs). Molecular recognition is an important initial step for the biomolecular interactions and their functional proceedings. Although previous studies have established occurrence of the IDPRs in Zika virus proteome, which provide the functional diversity and structural plasticity to viral proteins, the MoRF analysis has not been performed as of yet. Many computational methods have been developed for the identification of the MoRFs in protein sequences including ANCHOR, MoRFpred, DISOPRED3, and MoRFchibi_web server. In the current study, we have investigated the presence of MoRF regions in structural and non-structural proteins of Zika virus using an aforementioned set of computational techniques. Furthermore, we have experimentally validated the intrinsic disorderness of NS2B cofactor region of NS2B–NS3 protease. NS2B has one of the longest MoRF regions in Zika virus proteome. In future, this study may provide valuable information while investigating the virus host protein interaction networks. 相似文献
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Kannan Tharakaraman Satoru Watanabe Kuan Rong Chan Jia Huan Vidya Subramanian Yok Hian Chionh Aditya Raguram Devin Quinlan Megan McBee Eugenia Z. Ong Esther S. Gan Hwee Cheng Tan Anu Tyagi Shashi Bhushan Julien Lescar Subhash G. Vasudevan Eng Eong Ooi Ram Sasisekharan 《Cell host & microbe》2018,23(5):618-627.e6
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Matthew J. Gorman Elizabeth A. Caine Konstantin Zaitsev Matthew C. Begley James Weger-Lucarelli Melissa B. Uccellini Shashank Tripathi Juliet Morrison Boyd L. Yount Kenneth H. Dinnon Claudia Rückert Michael C. Young Zhe Zhu Shelly J. Robertson Kristin L. McNally Jing Ye Bin Cao Indira U. Mysorekar Michael S. Diamond 《Cell host & microbe》2018,23(5):672-685.e6
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Wang Jing Xu Hongbin Song Song Cheng Rui Fan Na Fu Shihong Zhang Shaozai Xu Ziqian He Ying Lei Wenwen Li Fan Wang Huanyu Lu Xiaoqing Liang Guodong 《中国病毒学》2021,36(1):33-42
Zika virus(ZIKV) has been isolated from mosquitoes such as Aedes, Mansonia uniformis, and Culex perfuscus; However,the isolation of ZIKV from Anopheles sinensis and Culex tritaeniorhynchus has not yet been reported. In June and July2018, 22,985 mosquitoes and 57,500 midges were collected in Jiangxi Province in southeastern China. Among them, six strains of ZIKV were isolated from mosquitoes: four from An. sinensis and two from Cx. tritaeniorhynchus. Molecular genetic analysis showed that the ZIKV isolated from An. sinensis and Cx. tritaeniorhynchus belonged to genotype 2 in the Asian evolutionary branch of ZIKV. In addition, the ZIKV strains isolated from An. sinensis and Cx. tritaeniorhynchus had amino acid substitutions identical to ZIKV strains prevalent in South America since 2015. This study is the first to isolate ZIKV from mosquito specimens collected in the wild of Jiangxi Province, China; This is also the first time that ZIKV has been isolated from An. sinensis and Cx. tritaeniorhynchus. Given that An. sinensis and Cx. tritaeniorhynchus have a very wide geographical distribution in China and even in eastern and southern Asia, the isolation of several strains of ZIKV from these two mosquitoes poses new challenges for the prevention and control of ZIKV infection in the mainland of China and countries and regions with the same distribution of mosquitoes. 相似文献