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Virol J. 2007 Jun 12;4:60.

Porcine adenovirus type 3 E1B large protein downregulates the induction of IL-8.

Author information

1
Vaccine and Infectious Disease Organization, University of Saskatchewan, Saskatoon, Saskatchewan, Canada. yan.zhou@usask.ca

Abstract

Replication-defective (E1-E3 deleted) adenovirus vector based gene delivery results in the induction of cytokines including IL-8, which may contribute to the development of inflammatory immune responses. Like other adenoviruses, E1 + E3 deleted porcine adenovirus (PAdV) 3 induces the production of IL-8 in infected cells. In contrast, no IL-8 production could be detected in cells infected with wild-type or mutant PAdV-3s containing deletion in E1A + E3 (PAV211) or E1Bsmall + E3 (PAV212). Expression of PAdV-3 E1Blarge inhibited the NF-kappaB dependent transcription of luciferase from IL-8 promoter. Imunofluorescence and electrophoretic mobility shift assays suggested that constitutive expression of PAdV-3 E1Blarge inhibited the nuclear translocation of NF-kappaB and its subsequent binding to DNA. These results suggest that E1Blarge interacts with NF-kappaB to prevent transcription and down regulate proinflammatory cytokine IL-8 production.

PMID:
17565687
PMCID:
PMC1906745
DOI:
10.1186/1743-422X-4-60
[Indexed for MEDLINE]
Free PMC Article

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