Ebola Virus VP35 Hijacks PKA-CREB1 Pathway for Replication and Pathogenesis by AKIP1 Association
Ebola virus (EBOV), one of the deadliest viruses, is the cause of fatal Ebola hemorrhagic fever (EHF)1,2. The underlying mechanism of viral replication and EBOV-related hemorrhage is not fully understood. Here, we show that EBOV VP35, a cofactor of viral RNA-dependent RNA polymerase, binds human A kinase interacting protein (AKIP1), which consequently activates protein kinase A (PKA) and PKA-downstream transcription factor CREB1. During EBOV infection, CREB1 is recruited into EBOV ribonucleoprotein complexes in viral inclusion bodies (VIBs) and employed for viral replication. AKIP1 depletion or PKA-CREB1 inhibition dramatically impairs EBOV replication. Meanwhile, the transcription of several coagulation-related genes, including THBD and SERPINB2, is substantially upregulated by VP35-dependent CREB1 activation, which may contribute to EBOV-related hemorrhage. The finding that EBOV VP35 hijacks the host PKA-CREB1 signal axis for viral replication and pathogenesis provides novel potential therapeutic approaches against Ebola virus disease.
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Extended Data
Posted 25 Jan, 2021
Ebola Virus VP35 Hijacks PKA-CREB1 Pathway for Replication and Pathogenesis by AKIP1 Association
Posted 25 Jan, 2021
Ebola virus (EBOV), one of the deadliest viruses, is the cause of fatal Ebola hemorrhagic fever (EHF)1,2. The underlying mechanism of viral replication and EBOV-related hemorrhage is not fully understood. Here, we show that EBOV VP35, a cofactor of viral RNA-dependent RNA polymerase, binds human A kinase interacting protein (AKIP1), which consequently activates protein kinase A (PKA) and PKA-downstream transcription factor CREB1. During EBOV infection, CREB1 is recruited into EBOV ribonucleoprotein complexes in viral inclusion bodies (VIBs) and employed for viral replication. AKIP1 depletion or PKA-CREB1 inhibition dramatically impairs EBOV replication. Meanwhile, the transcription of several coagulation-related genes, including THBD and SERPINB2, is substantially upregulated by VP35-dependent CREB1 activation, which may contribute to EBOV-related hemorrhage. The finding that EBOV VP35 hijacks the host PKA-CREB1 signal axis for viral replication and pathogenesis provides novel potential therapeutic approaches against Ebola virus disease.
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5