Overexpression of RFT induces G1-S arrest and apoptosis via p53/p21(Waf1) pathway in glioma cell

Biochem Biophys Res Commun. 2004 May 7;317(3):902-8. doi: 10.1016/j.bbrc.2004.03.120.

Abstract

The regulator of fibroblast growth factor 2 (FGF-2) transcription (RFT) has been reported to be a transcriptional repressor of FGF-2 and induce glioma cell death by its overexpression. Here we report that RFT regulates cell cycle as well as apoptosis by a novel mechanism. RFT expressed in some glioma cell lines, U138MG and T98G, but neither in U87MG nor U251MG. Overexpressed RFT-induced apoptosis in U87MG and U138MG with functioning-type p53 but neither in U251MG nor T98G with non-functioning-type p53. Administration of FGF-2 failed to prevent RFT-induced apoptosis. Overexpression of RFT caused G1-S arrest and upregulated both the phosphorylation of p53 at Ser-15 and the expression level of p21(Waf1). Furthermore, RNAi knockdown of p53 abolished RFT-induced apoptosis in U87MG. Taken together, our results support that RFT regulates G1-S transition and apoptosis via p53/p21(Waf1) pathway.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Apoptosis / physiology*
  • Base Sequence
  • Brain Neoplasms / pathology*
  • Cell Line, Tumor
  • Cyclin-Dependent Kinase Inhibitor p21
  • Cyclins / physiology*
  • DNA Primers
  • DNA-Binding Proteins*
  • Fluorescent Antibody Technique
  • G1 Phase / physiology*
  • Glioma / pathology*
  • Humans
  • Molecular Sequence Data
  • Phosphorylation
  • Repressor Proteins / genetics
  • Repressor Proteins / physiology*
  • S Phase / physiology*
  • Transcription Factors
  • Tumor Suppressor Protein p53 / physiology*

Substances

  • CDKN1A protein, human
  • Cyclin-Dependent Kinase Inhibitor p21
  • Cyclins
  • DNA Primers
  • DNA-Binding Proteins
  • MBD1 protein, human
  • Repressor Proteins
  • Transcription Factors
  • Tumor Suppressor Protein p53