Association ofSOD3 promoter DNA methylation with its down-regulation in breast carcinomas
| Autor: | Brandon Griess, David Klinkebiel, Alice Kueh, Michelle Desler, Kenneth Cowan, Matthew Fitzgerald, Melissa Teoh-Fitzgerald |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Epigenetics, Vol 15, Iss 12, Pp 1325-1335 (2020) |
| Druh dokumentu: | article |
| ISSN: | 1559-2294 1559-2308 15592294 |
| DOI: | 10.1080/15592294.2020.1777666 |
| Popis: | Superoxide dismutase 3 (SOD3) is a secreted antioxidant enzyme that regulates reactive oxygen species in the microenvironment. It is also a potential tumour suppressor gene that is significantly downregulated in breast cancer. We have previously shown that its mRNA expression is inversely correlated with relapse free survival in breast cancer patients. This study aimed to investigate the correlation of SOD3 promoter DNA methylation with its expression in different molecular subtypes of breast carcinoma. We found that SOD3 expression was significantly reduced in breast carcinoma samples compared to normal tissues with the lowest levels observed in Luminal B subtype. Pyrosequencing analysis showed significant increase in methylation levels in the SOD3 promoter region (−108 and −19 from the TSS) in tumours vs normal tissues (53.6% vs 25.2%). The highest degree of correlation between methylation and SOD3 expression levels was observed in Luminal B subtype (Spearman’s R = −0.540, P |
| Databáze: | Directory of Open Access Journals |
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