Abstract
As one of the deadliest viruses,Ebola virus(EBOV)causes lethal hemorrhagic fevers in humans and nonhuman primates.The suppression of innate immunity leads to robust systemic virus replication of EBOV,leading to enhanced transmission.However,the mechanism of EBOV-host interaction is not fully understood.Here,we identified multiple dysregulated genes in early stage of EBOV infection through transcriptomic analysis,which are highly clustered to Jak-STAT signaling.EBOV VP35 and VP30 were found to inhibit type Ⅰ interferon(IFN)signaling.Moreover,exog-enous expression of VP35 blocks the phosphorylation of endogenous STAT1,and suppresses nuclear translocation of STAT1.Using serial truncated mutations of VP35,N-terminal 1-220 amino acid residues of VP35 were identified to be essential for blocking on type Ⅰ IFN signaling.Remarkably,VP35 of EBOV suppresses type Ⅰ IFN signaling more efficiently than those of Bundibugyo virus(BDBV)and Marburg virus(MARV),resulting in stable replication to facilitate the pathogenesis.Altogether,this study enriches understanding on EBOV evasion of innate immune response,and provides insights into the interplay between filoviruses and host.
基金项目
BSL-4 Laboratory,Wuhan Institute of Virology,Chinese Academy of Sciences()
National Biosafety Laboratory(Wuhan)()
Chinese Academy of Sciences()
Center for Biosafety Mega-Science,Chinese Academy of Sciences()
National Virus Resource Center()
Strategic Priority Research Program of the Chinese Academy of Sciences(XDB0490000)
National Natural Science Foundation of China(82202521)
NETL
NSTL
万方数据