SIRT1 suppresses the epithelial-to-mesenchymal transition in cancer metastasis and organ fibrosis.

SIRT1 suppresses the epithelial-to-mesenchymal transition in cancer metastasis and organ fibrosis.
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DOI:
10.1016/j.celrep.2013.03.019
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发表时间:
2013-04-25
期刊:
影响因子:
8.8
通讯作者:
Guarente L
Guarente L
中科院分区:
生物学1区
文献类型:
--
作者:
Simic P;Williams EO;Bell EL;Gong JJ;Bonkowski M;Guarente L

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上皮到间充质转化(EMT)对于癌症转移和器官纤维化的发展是重要的,这些疾病在衰老中普遍存在。由于sirtuins影响衰老病理,我们测试了SirT1对EMT的影响。HMLER乳腺癌细胞中SIRT1水平降低导致裸鼠转移增加,肾小管上皮细胞中SIRT1的缺失加剧了损伤性肾纤维化。SIRT1通过去乙酰化Smad4和抑制TGF-β信号传导对Smad4靶基因MMP7的影响,从而减少癌症和纤维化中的EMT。因此,较少的e -钙粘蛋白从细胞表面断裂,β-连环蛋白在细胞-细胞连接处仍然与e -钙粘蛋白结合。我们的研究结果表明SIRT1/Smad4/β-catenin轴可能是EMT驱动疾病的靶标。
The epithelial-to-mesenchymal transition (EMT) is important for the development of cancer metastases and organ fibrosis, conditions prevalent in aging. Because sirtuins affect the pathology of aging, we tested the effect of SirT1 on EMT. Reduced SIRT1 levels in HMLER breast cancer cells led to increased metastases in nude mice, and the loss of SIRT1 in kidney tubular epithelial cells exacerbated injury-induced kidney fibrosis. SIRT1 reduces EMT in cancer and fibrosis by deacetylating Smad4 and repressing the effect of TGF-β signaling on MMP7, a Smad4 target gene. Consequently, less E-cadherin is cleaved from the cell surface and β-catenin remains bound to E-cadherin at the cell-cell junctions. Our findings suggest that the SIRT1/Smad4/β-catenin axis may be a target for diseases driven by EMT.
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