Sex Steroids Regulate Expression of Genes Containing Long Interspersed Elements-1s in Breast Cancer Cells

Chaiwongwatanakul, Saichon; Yanatatsaneejit, Pattamawadee; Tongsima, Sissades; Mutirangura, Apiwat; Boonyaratanakornkit, Viroj

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자료유형: 학술저널

저자정보: Chaiwongwatanakul, Saichon (Department of Biological Sciences, Faculty of Science, Chulalongkorn University) Yanatatsaneejit, Pattamawadee (Human Genetics Research Group, department of Botany, Faculty of Sciences, Chulalongkorn University) Tongsima, Sissades (Biostatistics and Informatics Laboratory, Genome Institute, National Center for Genetic Engineering and Biotechnology) Mutirangura, Apiwat (Center of Excellence in Molecular Genetics of Cancer and Human Diseases, Department of Anatomy, Faculty of Medicine, Chulalongkorn University) Boonyaratanakornkit, Viroj (Department of Clinical Chemistry, Faculty of Allied Health Sciences, Chulalongkorn University)

저널정보: 아시아태평양암예방학회 Asian Pacific journal of cancer prevention : APJCP Asian Pacific journal of cancer prevention : APJCP 제17권 제8호

발행연도: 2016.1

수록면: 4,003 - 4,007 (5page)

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Long interspersed elements-1s (LINE-1s) are dispersed all over the human genome. There is evidence that hypomethylation of LINE-1s and levels of sex steroids regulate gene expression leading to cancer development. Here, we compared mRNA levels of genes containing an intragenic LINE-1 in breast cancer cells treated with various sex steroids from Gene Expression Omnibus (GEO), with the gene expression database using chi-square analysis (http://www.ncbi.nlm.nih.gov/geo). We evaluated whether sex steroids influence expression of genes containing an intragenic LINE-1. Three sex steroids at various concentrations, 1 and 10 nM estradiol (E2), 10 nM progesterone (PG) and 10 nM androgen (AN), were assessed. In breast cancer cells treated with 1 or 10 nM E2, a significant percentage of genes containing an intragenic LINE-1 were down-regulated. A highly significant percentage of E2-regulated genes containing an intragenic LINE-1 was down-regulated in cells treated with 1 nM E2 for 3 hours (p<3.70E-25; OR=1.91; 95% CI=2.16-1.69). Similarly, high percentages of PG or AN-regulated genes containing an intragenic LINE-1 wwere also down-regulated in cells treated with 10 nM PG or 10 nM AN for 16 hr (p=9.53E-06; OR=1.65; 95% CI=2.06-1.32 and p=3.81E-14; OR=2.01; 95% CI=2.42-1.67). Interestingly, a significant percentage of AN-regulated genes containing an intragenic LINE-1 was up-regulated in cells treated with 10 nM AN for 16 hr (p=4.03E-02; OR=1.40; 95% CI=1.95-1.01). These findings suggest that intragenic LINE-1s may play roles in sex steroid mediated gene expression in breast cancer cells, which could have significant implications for the development and progression of sex steroid-dependent cancers.

#Estrogen #progesterone #androgen #LINE-1s #gene experession #breast cancer cells

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