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PubMed · 1830663

Interleukin 6 enhances a cellular activity that functionally substitutes for E1A protein in transactivation.

J M Spergel·S Chen-Kiang
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Abstract

An interleukin 6 (IL-6)-regulated cellular activity in HepG2 cells is found to functionally substitute for the transcriptional transactivator product of the adenovirus transforming gene E1A in transactivating E1A-dependent and E1A-responsive viral early genes. Mutant viruses deficient in E1A expression replicate in HepG2 cells. Induction with IL-6 leads to significant enhancement of synthesis of viral early E1B and E2ae mRNAs by greater than 30-fold and increases viral replication to the wild-type levels. The E1A-substituting activity activates E1A-responsive promoters in transient transfection, and this transcriptional activity is regulated by IL-6 induction. Formation of distinct protein-promoter complexes by binding of proteins in nuclear extracts prepared from HepG2 cells to the E1A-dependent E2ae promoter further supports the possibility that this activity may be a nuclear component in the IL-6 signal transduction pathway.

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Adenovirus Early ProteinsAdenoviruses, HumanBase SequenceCell LineCell NucleusDNA ReplicationDNA, NeoplasmDNA, ViralFetusGenes, ViralHeLa CellsHumansInterleukin-6LiverMolecular Sequence DataOligonucleotide ProbesOncogene Proteins, ViralPromoter Regions, GeneticRestriction MappingTranscription FactorsTranscription, GeneticTranscriptional ActivationJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, P.H.S.

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J M Spergel, S Chen-Kiang. 1991-08-01. Interleukin 6 enhances a cellular activity that functionally substitutes for E1A protein in transactivation.. https://doi.org/10.1073/pnas.88.15.6472

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