MLL4 mediates differentiation and tumor suppression through ferroptosis.

MLL4 mediates differentiation and tumor suppression through ferroptosis.
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DOI:
10.1126/sciadv.abj9141
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发表时间:
2021-12-10
期刊:
影响因子:
13.6
通讯作者:
Capell BC
Capell BC
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Egolf S;Zou J;Anderson A;Simpson CL;Aubert Y;Prouty S;Ge K;Seykora JT;Capell BC

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这项研究揭示了表观遗传错误如何通过改变细胞命运和受损的铁下垂来推动皮肤癌的发生。表观遗传调控基因MLL4(KMT2D)被描述为人类和小鼠的必需基因。此外,它是所有癌症生物学中最常见的突变基因之一。在这里,我们确定了MLL4在促进表皮分化和铁性下垂中的关键作用,这是抑制肿瘤的关键机制。缺乏表皮MLL4而不是相关酶MLL3(Kmt2c)的小鼠表现出分化障碍和人类癌前肿瘤的特征,所有这些都随着年龄的增长而进展。MLL4缺乏症深刻改变了表皮基因的表达,并独特地改变了铁下垂的关键基因和标志物(Alox12、Alox12b和Aloxe3)的表达。除了揭示MLL4介导的肿瘤抑制的新的机制基础外,我们的数据还揭示了铁性下垂在分化和皮肤动态平衡过程中潜在的更广泛和更普遍的作用。
This study reveals how epigenetic errors drive skin cancer initiation via altered cell fate and impaired ferroptosis. The epigenetic regulator, MLL4 (KMT2D), has been described as an essential gene in both humans and mice. In addition, it is one of the most commonly mutated genes in all of cancer biology. Here, we identify a critical role for Mll4 in the promotion of epidermal differentiation and ferroptosis, a key mechanism of tumor suppression. Mice lacking epidermal Mll4, but not the related enzyme Mll3 (Kmt2c), display features of impaired differentiation and human precancerous neoplasms, all of which progress with age. Mll4 deficiency profoundly alters epidermal gene expression and uniquely rewires the expression of key genes and markers of ferroptosis (Alox12, Alox12b, and Aloxe3). Beyond revealing a new mechanistic basis for Mll4-mediated tumor suppression, our data uncover a potentially much broader and general role for ferroptosis in the process of differentiation and skin homeostasis.
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