Oncogenes, tumor suppressors and p52 NF-kappaB.
A role for the p52 NF-kappaB subunit in tumorigenesis has been steadily emerging since its discovery as a gene associated with chromosomal translocations in B- and T-cell lymphomas. Now Eliopoulos and co-workers have extended these studies to examine the effect of the Epstein-Barr virus (EBV)-encoded latent infection membrane protein 1 (LMP1) on p52. They find that LMP1 stimulates the processing of p100 to p52 NF-kappaB. Moreover, nuclear p52 is also associated with LMP1 expression in tumor tissue biopsies. They also demonstrate that the pathway leading to p100/p52 processing is distinct from that engaged by LMP1 to activate other NF-kappaB subunits through IkappaBalpha degradation. A clearer picture is now developing of the important role that p52 NF-kappaB plays during normal cell growth and how subverting its function can contribute to oncogenesis.
Perkins
Neil D
ND
Division of Gene Regulation and Expression, School of Life Sciences, MSI/WTB Complex, Dow Street, University of Dundee, Dundee DD1 5EH, UK. n.d.perkins@dundee.ac.uk
D015972:Gene Expression Regulation, Neoplastic; D016147:Genes, Tumor Suppressor; D006801:Humans; D016328:NF-kappa B / Q000378:metabolism*; D052003:NF-kappa B p52 Subunit; D009369:Neoplasms / Q000235:genetics / Q000378:metabolism*; D009857:Oncogenes
D016328:NF-kappa B; D052003:NF-kappa B p52 Subunit