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https://doi.org/10.1016/j.canlet.2008.10.038
Title: | Silencing the Metallothionein-2A gene inhibits cell cycle progression from G1- to S-phase involving ATM and cdc25A signaling in breast cancer cells | Authors: | Lim, D. Jocelyn, K.M.-X. Yip, G.W.-C. Bay, B.-H. |
Keywords: | ATM Breast cancer cdc25A Cell cycle Metallothionein |
Issue Date: | 2009 | Citation: | Lim, D., Jocelyn, K.M.-X., Yip, G.W.-C., Bay, B.-H. (2009). Silencing the Metallothionein-2A gene inhibits cell cycle progression from G1- to S-phase involving ATM and cdc25A signaling in breast cancer cells. Cancer Letters 276 (1) : 109-117. ScholarBank@NUS Repository. https://doi.org/10.1016/j.canlet.2008.10.038 | Abstract: | Metallothioneins (MTs) are a group of metal-binding proteins involved in cell proliferation, differentiation and apoptosis. The MT-2A isoform is generally the most abundant isoform among the 10 known functional MT genes. In the present study, we observed that down-regulation of the MT-2A gene in MCF-7 cells via siRNA-mediated silencing inhibited cell growth by inducing cell cycle arrest in G1-phase (G1-arrest) and a marginal increase in cells in sub-G1-phase. Scanning electron microscopic examination of the cells with silenced expression of MT-2A (siMT-2A cells) revealed essentially normal cell morphology with presence of scattered apoptotic cells. To elucidate the underlying molecular mechanism, we examined the expression of cell cycle related genes in MT-2A-silenced cells and found a higher expression of the ataxia telangiectasia mutated (ATM) gene concomitant with a lower expression of the cdc25A gene. These data suggest that MT-2A could plausibly modulate cell cycle progression from G1- to S-phase via the ATM/Chk2/cdc25A pathway. © 2008 Elsevier Ireland Ltd. All rights reserved. | Source Title: | Cancer Letters | URI: | http://scholarbank.nus.edu.sg/handle/10635/23911 | ISSN: | 03043835 | DOI: | 10.1016/j.canlet.2008.10.038 |
Appears in Collections: | Staff Publications |
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