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Volume 97, Issue 9

Multiple Bcl-2 family immunomodulators from vaccinia virus regulate MAPK/AP-1 activation Open Access

Abstract

Vaccinia virus (VACV) is a poxvirus and encodes many proteins that modify the host cell metabolism or inhibit the host response to infection. For instance, it is known that VACV infection can activate the mitogen-activated protein kinase (MAPK)/activator protein 1 (AP-1) pathway and inhibit activation of the pro-inflammatory transcription factor NF-κB. Since NF-κB and MAPK/AP-1 share common upstream activators we investigated whether six different VACV Bcl-2-like NF-κB inhibitors can also influence MAPK/AP-1 activation. Data presented show that proteins A52, B14 and K7 each contribute to AP-1 activation during VACV infection, and when expressed individually outwith infection. B14 induced the greatest stimulation of AP-1 and further investigation showed B14 activated mainly the MAPKs ERK (extracellular signal-regulated kinase) and JNK (Jun N-terminal kinase), and their substrate c-Jun (a component of AP-1). These data indicate that the same viral protein can have different effects on distinct signalling pathways, in blocking NF-κB activation whilst leading to MAPK/AP-1 activation.

  • Received:
  • Accepted:
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Keyword(s): AP-1 , Bcl-2 family , immune evasion , MAP kinase , NF-kB and Vaccinia virus
© 2016 The Authors
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2016-09-01
2024-04-24
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Multiple Bcl-2 family immunomodulators from vaccinia virus regulate MAPK/AP-1 activation
J. Gen. Virol. 97, 2346 (2016); https://doi.org/10.1099/jgv.0.000525
/content/journal/jgv/10.1099/jgv.0.000525
/content/journal/jgv/10.1099/jgv.0.000525
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