Abstract
β-catenin plays a pivotal role in cell-to-cell adhesion as a transcriptional activator in signal transduction pathways. Potential role of this gene was studied in a radiation- and estrogen breast cancer model by analyzing differential expression of associated genes of β-catenin as E-cadherin and catenins. The aim was to identify whether β-catenin gene was mutated when associated with other genes as glycogen synthase kinase-3-β (GSK-3-β), T-cell factor (TCF) and other extracellular matrix genes related to cell adhesion. Results indicated that β-catenin gene had increased expression at mRNA and mutation at exon3 in irradiated and estrogen-treated cell lines when compared to MCF-10F. It was found that β-catenin and GSK-3-β had greater protein expression in the tumorigenic cell line, called Alpha5 and the tumor cell lines, called Tumor2 than control MCF-10F and non-malignant Alpha3 cell lines. The β-catenin/GSK-3-β complex was identified in non-malignant cell lines such as MCF-10F, Estrogen, Alpha1, Alpha3, and Alpha4 cell lines by immunoprecipitation assays. However, Alpha5 and Tumor2 did not form a complex in this assay. However, β-catenin/TCF-4 complex was found only in Alpha5 and Tumor2. Immunofluorescent studies confirmed these findings since co-localization in β-catenin and GSK-3-β was only found in MCF-10F and Alpha3 while β-catenin/TCF-4 was only observed in Alpha5 and Tumor2. It can be concluded that mutation of β-catenin and its interaction with other associated proteins may be an early event during radiation and estrogen induced progression of human breast carcinogenesis.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.