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Title

African swine fever virus IAP-like protein induces the activation of nuclear factor kappa B

AuthorsRodríguez, Clara I.; Nogal París, María Luisa; Carrascosa, Ángel L.; Salas, María Luisa; Fresno, Manuel CSIC ORCID ; Revilla Novella, Yolanda
KeywordsAfrican swine fever virus
Issue Date2002
PublisherAmerican Society for Microbiology
CitationJournal of Virology, 2002, p. 3936-3942, Vol. 76, No. 8
AbstractAfrican swine fever virus (ASFV) encodes a homologue of the inhibitor of apoptosis (IAP) that promotes cell survival by controlling the activity of caspase-3. Here we show that ASFV IAP is also able to activate the transcription factor NF-B. Thus, transient transfection of the viral IAP increases the activity of an NF-B reporter gene in a dose-responsive manner in Jurkat cells. Similarly, stably transfected cells expressing ASFV IAP have elevated basal levels of c-rel, an NF-B-dependent gene. NF-B complexes in the nucleus were increased in A224L-expressing cells compared with control cells upon stimulation with phorbol myristate acetate (PMA) plus ionomycin. This resulted in greater NF-B-dependent promoter activity in ASFV IAP-expressing than in control cells, both in basal conditions and after PMA plus ionophore stimulation. The elevated NF-B activity seems to be the consequence of higher IB kinase (IKK) basal activity in these cells. The NF-B-inducing activity of ASFV IAP was abrogated by an IKK-2 dominant negative mutant and enhanced by expression of tumor necrosis factor receptor-associated factor 2
Publisher version (URL)http://dx.doi.org/10.1128/JVI.76.8.3936-3942.2002
URIhttp://hdl.handle.net/10261/8546
DOI10.1128/JVI.76.8.3936-3942.2002
ISSN0022-538X
E-ISSN1098-5514
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