甲型流感病毒传播感染动物模型的构建与比较研究
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1.湖南普瑞玛药物研究中心有限公司;2.湖南普瑞玛药物研究中心有限公司 新药药效与安全性评价湖南省重点实验室

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长沙市“小荷”青年人才创新项目(No.(2022)056);湖南省重点研发计划(No.2023DK2006);基于能量代谢通路的鼠尾草酸抗产后抑郁作用研究(No.2024JJ8140)


Construction and comparative study of animal models of influenza A virus transmission and infection
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1.Hunan Prima Drug Research Center Co. Ltd;2.Hunan Prima Drug Research Center Co., Ltd. &3.amp;4.Hunan Key Laboratory of Pharmacodynamics and Safety Evaluation of New Drugs

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    摘要:

    【】 目的 建立甲型H1N1、H3N2亚型流感病毒间接诱导动物呼吸道感染模型,筛选流感病毒传播宿主,为临床防治流感病毒提供理论支持。方法 将50只BALB/c小鼠及50只Hartley豚鼠,随机分为5组,均为正常对照组、病毒感染1组、病毒感染2组、密接传播1组、密接传播2组,每个种属每组各10只。病毒感染1组及病毒感染2组小鼠使用经鼻滴入甲型H1N1流感病毒、甲型H3N2流感病毒,病毒感染1组及病毒感染2组豚鼠鼻滴入甲型H1N1流感病毒、甲型H3N2流感病毒;病毒感染1组动物感染后次日与密接传播1组动物1:1合笼饲养,病毒感染2组动物感染后次日与密接传播2组动物1:1合笼饲养,连续观察7天。合笼第7天检测各组动物肺功能及鼻组织、气管、肺组织病毒滴度、病毒载量,检测密接传播组动物气管及肺组织病理变化。结果 与正常对照组-小鼠比较,病毒感染1、2组-小鼠、密接传播1、2组-小鼠动物鼻组织、气管及肺组织病毒滴度、病毒载量均显著增加(P < 0.01),气管及肺组织病理评分显著升高(P < 0.01),病毒感染1、2组-小鼠FVC、FEV20显著降低(P < 0.01);与正常对照组-豚鼠比较,病毒感染1、2组-豚鼠、密接传播1、2组-豚鼠动物鼻组织、气管及肺组织病毒滴度、病毒载量均显著增加(P < 0.01),气管及肺组织病理评分显著升高(P < 0.01),FVC、FEV200均显著降低(P < 0.01)。结论 本研究分别采用甲型H1N1、H3N2亚型流感病毒间接诱导小鼠及豚鼠呼吸道感染,从动物肺功能、呼吸系统病毒滴度、病毒载量及病理方面对模型进行评价,呼吸道间接传播流感病毒的动物模型存在一定局限,其中流感病毒在小鼠间传播效率较低,在豚鼠间传播效率高,且模型稳定,进一步证实豚鼠具有病毒有效复制与传播特性。[1]

    Abstract:

    Objective To establish a model of indirectly induced respiratory tract infection in animals by influenza A (H1N1) and H3N2 subtypes viruses, to screen influenza virus transmission hosts, and to provide theoretical support for the clinical control of influenza viruses. Methods 50 BALB/c mice and 50 Hartley guinea pigs were randomly divided into 5 groups, which were normal control group, virus infection group 1, virus infection group 2, close transmission group 1, and close transmission group 2, with 10 animals in each group of each species. Mice in virus-infected group 1 and virus-infected group 2 were fed with influenza A (H1N1) and influenza A (H3N2) viruses via nasal drip, while guinea pigs in virus-infected group 1 and virus-infected group 2 were fed with influenza A (H1N1) and influenza A (H3N2) viruses via nasal drip; the animals in virus-infected group 1 were housed together with those in the close-transmission group 1:1 the following day, and the animals in virus-infected group 2 were housed together with those in the close-transmission group 1:1 the following day. Animals in virus infection group 1 were housed 1:1 with animals in close transmission group 1 the next day after infection, and animals in virus infection group 2 were housed 1:1 with animals in close transmission group 2 the next day after infection. On the 7th day, the lung function, viral titre and viral load of the nasal tissue, trachea and lung tissue of each group were measured, and the pathological changes of the trachea and lung tissue of the animals in the close transmission group were detected. Results Compared with the normal control group-mice, the viral titers and viral loads of nasal, tracheal and lung tissues of the virus-infected group 1 and 2-mice and the closely transmitted group 1 and 2-mice were significantly increased (P < 0.01), and the pathological scores of the trachea and lung tissues were significantly elevated (P < 0.01), and the FVC and FEV20 of the virus-infected group 1 and 2-mice were significantly decreased (P < 0.01); compared with the normal control group-guinea pigs, the FVC and FEV20 of the virus-infected group 1 and 2-mice were significantly decreased (P < 0.01). Compared with the normal control group-guinea pigs, the nasal tissue, trachea and lung tissues of virus-infected group 1 and 2-guinea pigs, and the nasal tissue, trachea and lung tissues of animals in the close transmission group 1 and 2-guinea pigs showed significant increases in viral titre and viral load (P < 0.01), significantly higher trachea and lung histopathological scores (P < 0.01), and significantly lower FVC and FEV200 (P < 0.01). Conclusion In this study, influenza A H1N1 and H3N2 subtypes influenza viruses were used to indirectly induce respiratory tract infections in mice and guinea pigs, respectively, and the models were evaluated in terms of animal lung function, respiratory viral titre, viral load and pathology. The animal model of indirect transmission of influenza viruses in the respiratory tract has certain limitations, in which influenza viruses are transmitted less efficiently among mice and more efficiently among guinea pigs, and the model is stable. This further confirms that guinea pigs have the characteristics of efficient replication and transmission of the virus..

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  • 收稿日期:2025-04-07
  • 最后修改日期:2025-07-01
  • 录用日期:2025-07-30
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