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  1. Article ; Online: Antagonisms of ASFV towards Host Defense Mechanisms: Knowledge Gaps in Viral Immune Evasion and Pathogenesis.

    Yu, Liangzheng / Zhu, Zhenbang / Deng, Junhua / Tian, Kegong / Li, Xiangdong

    Viruses

    2023  Volume 15, Issue 2

    Abstract: African swine fever (ASF) causes high morbidity and mortality of both domestic pigs and wild boars and severely impacts the swine industry worldwide. ASF virus (ASFV), the etiologic agent of ASF epidemics, mainly infects myeloid cells in swine ... ...

    Abstract African swine fever (ASF) causes high morbidity and mortality of both domestic pigs and wild boars and severely impacts the swine industry worldwide. ASF virus (ASFV), the etiologic agent of ASF epidemics, mainly infects myeloid cells in swine mononuclear phagocyte system (MPS), including blood-circulating monocytes, tissue-resident macrophages, and dendritic cells (DCs). Since their significant roles in bridging host innate and adaptive immunity, these cells provide ASFV with favorable targets to manipulate and block their antiviral activities, leading to immune escape and immunosuppression. To date, vaccines are still being regarded as the most promising measure to prevent and control ASF outbreaks. However, ASF vaccine development is delayed and limited by existing knowledge gaps in viral immune evasion, pathogenesis, etc. Recent studies have revealed that ASFV can employ diverse strategies to interrupt the host defense mechanisms via abundant self-encoded proteins. Thus, this review mainly focuses on the antagonisms of ASFV-encoded proteins towards IFN-I production, IFN-induced antiviral response, NLRP3 inflammasome activation, and GSDMD-mediated pyroptosis. Additionally, we also make a brief discussion concerning the potential challenges in future development of ASF vaccine.
    MeSH term(s) Animals ; Swine ; African Swine Fever ; Immune Evasion ; Monocytes ; Adaptive Immunity ; Antiviral Agents ; Sus scrofa
    Chemical Substances Antiviral Agents
    Language English
    Publishing date 2023-02-19
    Publishing country Switzerland
    Document type Journal Article ; Review ; Research Support, Non-U.S. Gov't
    ZDB-ID 2516098-9
    ISSN 1999-4915 ; 1999-4915
    ISSN (online) 1999-4915
    ISSN 1999-4915
    DOI 10.3390/v15020574
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Long-term co-circulation of multiple influenza A viruses in pigs, Guangxi, China.

    Huang, Chongqiang / Yu, Liangzheng / Xu, Yi / Huang, Jiamo / Qin, Yibin / Guo, Xuan / Zeng, Yongfang / Qin, Yifeng / Ouyang, Kang / Wei, Zuzhang / Huang, Weijian / García-Sastre, Adolfo / Chen, Ying

    Emerging microbes & infections

    2024  Volume 13, Issue 1, Page(s) 2337673

    Abstract: Influenza A viruses (IAVs) pose a persistent potential threat to human health because of the spillover from avian and swine infections. Extensive surveillance was performed in 12 cities of Guangxi, China, during 2018 and 2023. A total of 2540 samples ( ... ...

    Abstract Influenza A viruses (IAVs) pose a persistent potential threat to human health because of the spillover from avian and swine infections. Extensive surveillance was performed in 12 cities of Guangxi, China, during 2018 and 2023. A total of 2540 samples (including 2353 nasal swabs and 187 lung tissues) were collected from 18 pig farms with outbreaks of respiratory disease. From these, 192 IAV-positive samples and 19 genomic sequences were obtained. We found that the H1 and H3 swine influenza A viruses (swIAVs) of multiple lineages and genotypes have continued to co-circulate during that time in this region. Genomic analysis revealed the Eurasian avian-like H1N1 swIAVs (G4) still remained predominant in pig populations. Strikingly, the novel multiple H3N2 genotypes were found to have been generated through the repeated introduction of the early H3N2 North American triple reassortant viruses (TR H3N2 lineage) that emerged in USA and Canada in 1998 and 2005, respectively. Notably, when the matrix gene segment derived from the H9N2 avian influenza virus was introduced into endemic swIAVs, this produced a novel quadruple reassortant H1N2 swIAV that could pose a potential risk for zoonotic infection.
    MeSH term(s) Swine ; Animals ; Humans ; Influenza A Virus, H1N1 Subtype/genetics ; Influenza A Virus, H3N2 Subtype/genetics ; Influenza A Virus, H9N2 Subtype ; China/epidemiology ; Swine Diseases/epidemiology ; Orthomyxoviridae Infections/epidemiology ; Orthomyxoviridae Infections/veterinary ; Influenza, Human/epidemiology ; Reassortant Viruses/genetics ; Phylogeny
    Language English
    Publishing date 2024-04-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2681359-2
    ISSN 2222-1751 ; 2222-1751
    ISSN (online) 2222-1751
    ISSN 2222-1751
    DOI 10.1080/22221751.2024.2337673
    Database MEDical Literature Analysis and Retrieval System OnLINE

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