The invention discloses a H3N2 subtype canine influenza virus rat adapted virulent strain and an application thereof. The invention adopts virus separation, culture, animal infection and other technologies, obtains the virulence enhancement and pathogenic lethal amino acid mutation and deletion through mouse adaptation, and obtains the H3N2 subtype canine influenza virus mouse adaptive strong strain, which can cause lethal infection in mice, and is used for the effect evaluation of vaccine research and development, prevention and treatment drugs, influenza virus infection, pathogenicity / and death This study provides a powerful animal model. In addition, the HA gene of the mouse was not mutated and its antigenicity was not changed because of its adaptation to the virulent strain. It can be used as an antigen for preparation and / or basic experimental research based on antibody level detection. In conclusion, the adaptive virulent strain of the invention provides strong technical support for the research and development of H3N2 subtype canine influenza virus vaccine and the screening, infection, enhancement of virulence and other mechanisms of highly effective prevention and / or treatment drugs.
【技术实现步骤摘要】
一种H3N2亚型犬流感病毒鼠适应强毒株及其应用
本专利技术涉及一种犬流感病毒毒株,尤其涉及一种H3N2亚型犬流感病毒鼠适应强毒株及其应用,属于微生物工程
技术介绍
流感病毒(Influenzavirus,IV)为正粘病毒科,直径为80~120nm,其结构由内向外分为核蛋白(NP),基质蛋白(M),包膜三个部分。其基因组RNA由8个节段的单链RNA组成,分别为PB2、PB1、PA、HA、NP、NA、M、NS基因。目前己经发现的A型流感病毒具有18种HA亚型和11种NA亚型,其中H1~H16HA亚型和N1~N9NA亚型均来源于禽流感,而H17N10亚型和H18N11亚型仅见于蝙蝠。目前能够引起犬类感染的有H3、H6、H9亚型流感病毒,其中H3亚型已被确认为能够在体内稳定传播的特有毒株,被称为犬流感病毒(Canineinfluenzavirus,CIVs),分别来自马源H3N8和禽源H3N2。中国、韩国和泰国主要流行株以禽源H3N2犬流感病毒为主,而欧美流行株多为马源H3N8亚型。自2006年韩国首次报道了由禽源 ...
【技术保护点】
1.一种H3N2亚型犬流感病毒鼠适应强毒株,其特征在于,通过鼠适应后,获得包括但不限于PB2基因627K位点突变、PA基因531K位点突变以及NA基因颈部57位缺失的致病或致死性强毒株。/n
【技术特征摘要】
1.一种H3N2亚型犬流感病毒鼠适应强毒株,其特征在于,通过鼠适应后,获得包括但不限于PB2基因627K位点突变、PA基因531K位点突变以及NA基因颈部57位缺失的致病或致死性强毒株。
2.根据权利要求1所述的H3N2亚型犬流感病毒鼠适应强毒株,其特征在于,其HA基因序列如SEQIDNO.1所示,其NA基因序列如SEQIDNO.2所示,其NP基因序列如SEQIDNO.3所示,其PA基因序列如SEQIDNO.4所示,其PB1基因序列如SEQIDNO.5所示,其PB2基因序列如SEQIDNO.6所示,其M基因序列如SEQIDNO.7所示,其NS基因序列如SEQIDNO.8所示。
3.根据权利要求2所述的H3N2亚型犬流感病毒鼠适应强毒株,已保藏于中国微生物菌种保藏管理委员会普通微生物中心,保藏编号为CGMCCNO.18171,保藏日期为2019年6月26日,其分类命名为H3N2亚型犬流感病毒,毒株号为A/canine/Jilin/AMCQK7/2017(H3N2)。
4.权利要求1-3任一项所述的H3N2亚型犬流感病毒鼠适应强毒株在建立...
【专利技术属性】
技术研发人员:高玉伟,李元果,张醒海,金宁一,王铁成,孙伟洋,石晶,夏振强,殷玉和,胡鑫宇,冯娜,周博,李乐天,向海洋,赵永坤,杨松涛,夏咸柱,
申请(专利权)人:军事科学院军事医学研究院军事兽医研究所,
类型:发明
国别省市:吉林;22
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