| pubmed-article:20157118 | rdf:type | pubmed:Citation | lld:pubmed |
| pubmed-article:20157118 | lifeskim:mentions | umls-concept:C1326912 | lld:lifeskim |
| pubmed-article:20157118 | lifeskim:mentions | umls-concept:C0206494 | lld:lifeskim |
| pubmed-article:20157118 | lifeskim:mentions | umls-concept:C1515877 | lld:lifeskim |
| pubmed-article:20157118 | lifeskim:mentions | umls-concept:C1879547 | lld:lifeskim |
| pubmed-article:20157118 | lifeskim:mentions | umls-concept:C0173022 | lld:lifeskim |
| pubmed-article:20157118 | pubmed:issue | 16 | lld:pubmed |
| pubmed-article:20157118 | pubmed:dateCreated | 2010-4-12 | lld:pubmed |
| pubmed-article:20157118 | pubmed:abstractText | Selenium chemoprevention by apoptosis has been well studied, but it is not clear whether selenium can activate early barriers of tumorigenesis, namely senescence and DNA damage response. To test this hypothesis, we treated normal and cancerous cells with a gradient concentration of sodium selenite, methylseleninic acid and methylselenocysteine for 48 h, followed by a recovery of 1-7 days. Here we show that selenium compounds at doses of </=LD(50) can induce cellular senescence, as evidenced by the expression of senescence-associated beta-galactosidase and 5-bromo-2-deoxyuridine incorporation, in normal but not cancerous cells. In response to clastogens, the ataxia telangiectasia mutated (ATM) protein is rapidly activated, which in turn initiates a cascade of DNA damage response. We found that the ATM pathway is activated by the selenium compounds, and the kinase activity is required for the selenium-induced senescence response. Pretreatment of the MRC-5 non-cancerous cells with the antioxidant N-acetylcysteine or 2,2,6,6-tetramethylpiperidine-1-oxyl suppresses the selenium-induced ATM activation and senescence. Taken together, the results suggest a novel role of selenium in the activation of early tumorigenesis barriers specific in non-cancerous cells, whereby selenium induces an ATM-dependent senescence response that depends on reactive oxygen species. | lld:pubmed |
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| pubmed-article:20157118 | pubmed:language | eng | lld:pubmed |
| pubmed-article:20157118 | pubmed:journal | http://linkedlifedata.com/r... | lld:pubmed |
| pubmed-article:20157118 | pubmed:citationSubset | IM | lld:pubmed |
| pubmed-article:20157118 | pubmed:chemical | http://linkedlifedata.com/r... | lld:pubmed |
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| pubmed-article:20157118 | pubmed:status | MEDLINE | lld:pubmed |
| pubmed-article:20157118 | pubmed:month | Apr | lld:pubmed |
| pubmed-article:20157118 | pubmed:issn | 1083-351X | lld:pubmed |
| pubmed-article:20157118 | pubmed:author | pubmed-author:WuMinM | lld:pubmed |
| pubmed-article:20157118 | pubmed:author | pubmed-author:ChengWen-Hsin... | lld:pubmed |
| pubmed-article:20157118 | pubmed:author | pubmed-author:SchoeneNorber... | lld:pubmed |
| pubmed-article:20157118 | pubmed:author | pubmed-author:KangMandy MMM | lld:pubmed |
| pubmed-article:20157118 | pubmed:issnType | Electronic | lld:pubmed |
| pubmed-article:20157118 | pubmed:day | 16 | lld:pubmed |
| pubmed-article:20157118 | pubmed:volume | 285 | lld:pubmed |
| pubmed-article:20157118 | pubmed:owner | NLM | lld:pubmed |
| pubmed-article:20157118 | pubmed:authorsComplete | Y | lld:pubmed |
| pubmed-article:20157118 | pubmed:pagination | 12055-62 | lld:pubmed |
| pubmed-article:20157118 | pubmed:dateRevised | 2011-11-2 | lld:pubmed |
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