African swine fever(ASF)is a highly contagious and acute hemorrhagic viral disease with a high mortality approaching 100%in domestic pigs.ASF is an endemic in countries in sub-Saharan Africa.Now,it has been spreading ...African swine fever(ASF)is a highly contagious and acute hemorrhagic viral disease with a high mortality approaching 100%in domestic pigs.ASF is an endemic in countries in sub-Saharan Africa.Now,it has been spreading to many countries,especially in Asia and Europe.Due to the fact that there is no commercial vaccine available for ASF to provide sustainable prevention,the disease has spread rapidly worldwide and caused great economic losses in swine industry.The knowledge gap of ASF virus(ASFV)pathogenesis and immune evasion is the main factor to limit the development of safe and effective ASF vaccines.Here,we will summarize the molecular mechanisms of how ASFV interferes with the host innate and adaptive immune responses.An in-depth understanding of ASFV immune evasion strategies will provide us with rational design of ASF vaccines.展开更多
African swine fever(ASF)is an acute,highly contagious and deadly viral disease in swine that jeopardizes the worldwide pig industry.Unfortunately,there are no authoritative vaccine and antiviral drug available for ASF...African swine fever(ASF)is an acute,highly contagious and deadly viral disease in swine that jeopardizes the worldwide pig industry.Unfortunately,there are no authoritative vaccine and antiviral drug available for ASF control.African swine fever virus(ASFV)is the etiological agent of ASF.Among the ASFV proteins,p72 is the most abundant component in the virions and thus a potential target for anti-ASFV drug design.Here,we con-structed a luciferase reporter system driven by the promoter of p72,which is transcribed by the co-transfected ASFV RNA polymerase complex.Using this system,we screened over 3200 natural product compounds and obtained three potent candidates against ASFV.We further evaluated the anti-ASFV effects and proved that among the three candidates,ailanthone(AIL)inhibits the replication of ASFV at the nanomolar concentration(IC_(50)=15 nmol/L).Our in vitro experiments indicated that the antiviral effect of AIL is associated with its inhibition of the HSP90-p23 cochaperone.Finally,we showed the antiviral activity of AIL on Zika virus and hepatitis B virus(HBV),which supports that AIL is a potential broad-spectrum antiviral agent.展开更多
非洲猪瘟(ASF)是猪的一种急性,热性,高度接触性传染病,致死率可达100%。非洲猪瘟病毒(ASFV)是引起该病的病原。ASFV主要感染原代猪单核巨噬细胞系统,仅低效感染少数细胞系,这极大地制约了相应疫苗的研发及对ASFV病原生物学及致病机制的...非洲猪瘟(ASF)是猪的一种急性,热性,高度接触性传染病,致死率可达100%。非洲猪瘟病毒(ASFV)是引起该病的病原。ASFV主要感染原代猪单核巨噬细胞系统,仅低效感染少数细胞系,这极大地制约了相应疫苗的研发及对ASFV病原生物学及致病机制的探索。近期,PLoS Pathogens杂志在线发表了题为“The I7L protein of African swine fever virus is involved in viral pathogenicity by antagonizing the IFN-γ-triggered JAK-STAT signaling pathway through inhibiting the phosphorylation of STAT1”的研究论文,中国农业科学院哈尔滨兽医研究所孙元研究员、李素研究员、仇华吉研究员和李连峰研究员为该论文的共同通讯作者。研究证实,ASFV基因组编码的I7L蛋白可结合STAT1,从而抑制STAT1的磷酸化并拮抗IFN-γ介导的JAK-STAT信号通路,进而调控病毒致病力。该研究为开发ASF弱毒活疫苗提供了新靶点。展开更多
基金This review was supported by the National Natural Science Foundation of China(Grant 32172869).
文摘African swine fever(ASF)is a highly contagious and acute hemorrhagic viral disease with a high mortality approaching 100%in domestic pigs.ASF is an endemic in countries in sub-Saharan Africa.Now,it has been spreading to many countries,especially in Asia and Europe.Due to the fact that there is no commercial vaccine available for ASF to provide sustainable prevention,the disease has spread rapidly worldwide and caused great economic losses in swine industry.The knowledge gap of ASF virus(ASFV)pathogenesis and immune evasion is the main factor to limit the development of safe and effective ASF vaccines.Here,we will summarize the molecular mechanisms of how ASFV interferes with the host innate and adaptive immune responses.An in-depth understanding of ASFV immune evasion strategies will provide us with rational design of ASF vaccines.
基金the State Key R&D Project to Xu Tan(2022YFE0102200)the Department of Science and Technology of Hunan Province to Xiaofeng Zheng(2019RS1050 and 2021JJ30354)。
文摘African swine fever(ASF)is an acute,highly contagious and deadly viral disease in swine that jeopardizes the worldwide pig industry.Unfortunately,there are no authoritative vaccine and antiviral drug available for ASF control.African swine fever virus(ASFV)is the etiological agent of ASF.Among the ASFV proteins,p72 is the most abundant component in the virions and thus a potential target for anti-ASFV drug design.Here,we con-structed a luciferase reporter system driven by the promoter of p72,which is transcribed by the co-transfected ASFV RNA polymerase complex.Using this system,we screened over 3200 natural product compounds and obtained three potent candidates against ASFV.We further evaluated the anti-ASFV effects and proved that among the three candidates,ailanthone(AIL)inhibits the replication of ASFV at the nanomolar concentration(IC_(50)=15 nmol/L).Our in vitro experiments indicated that the antiviral effect of AIL is associated with its inhibition of the HSP90-p23 cochaperone.Finally,we showed the antiviral activity of AIL on Zika virus and hepatitis B virus(HBV),which supports that AIL is a potential broad-spectrum antiviral agent.
文摘非洲猪瘟(ASF)是猪的一种急性,热性,高度接触性传染病,致死率可达100%。非洲猪瘟病毒(ASFV)是引起该病的病原。ASFV主要感染原代猪单核巨噬细胞系统,仅低效感染少数细胞系,这极大地制约了相应疫苗的研发及对ASFV病原生物学及致病机制的探索。近期,PLoS Pathogens杂志在线发表了题为“The I7L protein of African swine fever virus is involved in viral pathogenicity by antagonizing the IFN-γ-triggered JAK-STAT signaling pathway through inhibiting the phosphorylation of STAT1”的研究论文,中国农业科学院哈尔滨兽医研究所孙元研究员、李素研究员、仇华吉研究员和李连峰研究员为该论文的共同通讯作者。研究证实,ASFV基因组编码的I7L蛋白可结合STAT1,从而抑制STAT1的磷酸化并拮抗IFN-γ介导的JAK-STAT信号通路,进而调控病毒致病力。该研究为开发ASF弱毒活疫苗提供了新靶点。
