Growth suppression induced by wild-type p53 protein is accompanied by selective down-regulation of proliferating-cell nuclear antigen expression.
AUTOR(ES)
Mercer, W E
RESUMO
The p53 gene is a frequent target of mutation in a wide variety of human cancers. Previously, it was reported that conditional expression of wild-type p53 protein in a cell line (GM47.23) derived from a human glioblastoma multiform tumor had a negative effect on cell proliferation. We have now investigated the effect that induction of wild-type p53 protein in this cell line has on the expression of the proliferating-cell nuclear antigen gene. The proliferating-cell nuclear antigen gene encodes a nuclear protein that is an auxiliary factor of DNA polymerase delta and part of the DNA replication machinery of the cell. We show that inhibition of cell cycle progression into S-phase after induction of wild-type p53 protein is accompanied by selective down-regulation of proliferating-cell nuclear antigen mRNA and protein expression.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=51145Documentos Relacionados
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