Document Detail


The Epstein-Barr virus nuclear antigen 2 (EBNA2), a protein required for B lymphocyte immortalization, induces the synthesis of type I interferon in Burkitt's lymphoma cell lines.
MedLine Citation:
PMID:  10195428     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Epstein-Barr virus nuclear antigen 2 (EBNA2), a protein involved in cell transformation, interferes with the cellular response to type I interferons (IFN-alpha/beta). We investigated the function of conditionally expressed EBNA2 in the context of the IFN response in Burkitt's lymphoma cell lines. Expression of EBNA2 led to the transcriptional activation of both endogenous or transfected IFN-stimulated genes (ISGs), genes which contain within their promoters either the interferon-stimulated response element (ISRE) or the gamma interferon activation site (GAS). In search of a molecular mechanism for the transcriptional induction of ISGs, we observed an EBNA2-dependent synthesis of IFN-beta mRNA at low levels and the secretion of low amounts of IFN. A transfected IFN-beta promoter responded to EBNA2 activation, and a sequence closely resembling a RBP-Jkappa binding site was pinpointed as a potential target of EBNA2 activity. EBNA2-dependent transcriptional induction of the IFN-beta promoter occurred in EBV-negative Burkitt's lymphoma cells, indicating that other EBV genes were not required for the induction of IFN-beta synthesis.
Authors:
K Kanda; B Kempkes; G W Bornkamm; A von Gabain; T Decker
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Biological chemistry     Volume:  380     ISSN:  1431-6730     ISO Abbreviation:  Biol. Chem.     Publication Date:  1999 Feb 
Date Detail:
Created Date:  1999-06-03     Completed Date:  1999-06-03     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9700112     Medline TA:  Biol Chem     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  213-21     Citation Subset:  IM    
Affiliation:
Vienna Biocenter, Institute for Microbiology and Genetics, University of Vienna, Austria.
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MeSH Terms
Descriptor/Qualifier:
B-Lymphocytes / metabolism*
Base Sequence
Burkitt Lymphoma
DNA, Complementary
DNA-Binding Proteins / metabolism
Epstein-Barr Virus Nuclear Antigens / biosynthesis*
Gene Expression
Humans
Interferon Type I / biosynthesis
Interferon-alpha / metabolism
Interferon-beta / biosynthesis*,  genetics
Molecular Sequence Data
STAT1 Transcription Factor
Trans-Activators / metabolism
Tumor Cells, Cultured
Chemical
Reg. No./Substance:
0/DNA, Complementary; 0/DNA-Binding Proteins; 0/Epstein-Barr Virus Nuclear Antigens; 0/Interferon Type I; 0/Interferon-alpha; 0/STAT1 Transcription Factor; 0/STAT1 protein, human; 0/Trans-Activators; 77238-31-4/Interferon-beta

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