Acacetin and chrysin, two polyphenolic compounds, alleviate telomeric position effect in human cells.

Acacetin and chrysin, two polyphenolic compounds, alleviate telomeric position effect in human cells.
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DOI:
10.1038/mtna.2013.42
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发表时间:
2013-08-20
期刊:
Molecular therapy. Nucleic acids
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我们利用人类端粒沉默邻近基因的能力(端粒位置效应或TPE)来设计一种高通量的筛选方法来检测改变端粒的药物。我们首次发现,两种膳食黄酮,金合欢素和白杨素,能够特异性地减轻人类细胞中的TPE。我们进一步研究了它们对端粒完整性的影响,结果表明这两种药物都能显著地使端粒对DNA损伤反应失去保护。然而,由shelterin功能障碍触发的端粒去保护不影响TPE,表明金合欢素和白杨素靶向端粒的几种功能。这些结果表明,基于TPE的筛选试验代表了发现靶向端粒的新化合物的有价值的方法。
We took advantage of the ability of human telomeres to silence neighboring genes (telomere position effect or TPE) to design a high-throughput screening assay for drugs altering telomeres. We identified, for the first time, that two dietary flavones, acacetin and chrysin, are able to specifically alleviate TPE in human cells. We further investigated their influence on telomere integrity and showed that both drugs drastically deprotect telomeres against DNA damage response. However, telomere deprotection triggered by shelterin dysfunction does not affect TPE, indicating that acacetin and chrysin target several functions of telomeres. These results show that TPE-based screening assays represent valuable methods to discover new compounds targeting telomeres.
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