Reduction in cyclin D1/Cdk4/retinoblastoma protein signaling by CRE-decoy oligonucleotide
- Authors
- Park, YG; Park, S; Lim, SO; Lee, MS; Ryu, CK; Kim, I; Cho-Chung, YS
- Issue Date
- 16-3월-2001
- Publisher
- ACADEMIC PRESS INC
- Keywords
- CRE-decoy oligonucleotide; cyclin D1; retinoblastoma protein; G1 phase arrest; tumor growth inhibition
- Citation
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS, v.281, no.5, pp.1213 - 1219
- Indexed
- SCIE
SCOPUS
- Journal Title
- BIOCHEMICAL AND BIOPHYSICAL RESEARCH COMMUNICATIONS
- Volume
- 281
- Number
- 5
- Start Page
- 1213
- End Page
- 1219
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/124397
- DOI
- 10.1006/bbrc.2001.4521
- ISSN
- 0006-291X
- Abstract
- We have previously demonstrated that the activation of p53 signaling may contribute to tumor growth inhibition by the CRE-decoy oligonucleotide containing CRE sequence (5'-TGACGTCA-3') (Lee et al., Biochemistry 39, 4863-4868, 2000). However, growth inhibition by CRE-decoy treatment was also observed in tumor cells containing a mutant p53 (Park et al., J. Biol. Chem. 274, 1573-1580, 1999), To understand additional mechanisms of the decoy oligonucleotide, we investigated the effect on cyclin D1 expression and a cyclin D1/Cdk4/retinoblastoma protein (pRB) signaling pathway. Here we show that in MCF7 breast cancer cells the CRE-decoy competed with cyclin D1-CRE (5'-T (A) under bar ACGTCA-3') for binding transcription factors and reduced cyclin D1 gene expression (in reporter gene assay, Northern blotting and Western blotting) to modulate cyclin D1/Cdk4/pRB signaling and G1-S progression in a steady state and/or under estrogen stimulation. Decrease of cyclin D1 protein level by CRE-decoy treatment was also observed in p53-mutated cancer cells. Cyclin D1 expression was also diminished in MCF7 cells stably expressing dominant negative mutant CREB indicating that the nonspecific effect of oligonucleotide or its degradation products could be excluded. These data suggest that inhibition of cyclin D1 expression contributes to the growth inhibition induced by the decoy oligonucleotide in MCF7 cells through a cyclin D1/Cdk4/pRB signaling pathway. Downregulation of cyclin D1 expression also provides a mechanism of CRE-decoy-induced growth inhibition in tumor cells having p53 mutation. (C) 2001 Academic Press.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - Graduate School > Department of Biomedical Sciences > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.