Endogenous retroviruses drive KRAB zinc-finger protein family expression for tumor suppression.

Endogenous retroviruses drive KRAB zinc-finger protein family expression for tumor suppression.
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DOI:
10.1126/sciadv.abc3020
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发表时间:
2020-10
期刊:
影响因子:
13.6
通讯作者:
Sato K
Sato K
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Ito J;Kimura I;Soper A;Coudray A;Koyanagi Y;Nakaoka H;Inoue I;Turelli P;Trono D;Sato K

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HERV在肿瘤中的去抑制导致数百个KZFP的上调,这些KZFP是潜在的肿瘤抑制因子。基因表达异常是癌症的一个标志,但这种异常背后的机制尚不清楚。人类内源性逆转录病毒(HERV)是一种基因组重复元件,具有潜在的增强子功能。由于许多HERV在肿瘤中是表观遗传激活的,它们的激活可能会导致肿瘤中整体基因表达的异常。在这里,我们发现HERV在肿瘤中的激活导致数百个转录抑制因子的上调,即Krüppel相关的盒结构域包含的锌指家族蛋白(KZFP)。KZFP基因优先编码在肿瘤中被激活的HERV附近,并受这些相邻的HERV转录调控。HERV和KZFP在肿瘤中的表达增加与疾病状况的改善有关。KZFP在癌细胞中的表达增加改变了与细胞周期和细胞-基质黏附相关的基因的表达,并抑制了细胞的生长、迁移和侵袭能力。我们的数据表明,肿瘤中HERV的激活驱动KZFP表达的同步上调,可能导致肿瘤抑制。
The derepression of HERVs in tumors leads to the up-regulation of hundreds of KZFPs, which are potential tumor suppressors. Gene expression aberration is a hallmark of cancers, but the mechanisms underlying such aberrations remain unclear. Human endogenous retroviruses (HERVs) are genomic repetitive elements that potentially function as enhancers. Since numerous HERVs are epigenetically activated in tumors, their activation could cause global gene expression aberrations in tumors. Here, we show that HERV activation in tumors leads to the up-regulation of hundreds of transcriptional suppressors, namely, Krüppel-associated box domain–containing zinc-finger family proteins (KZFPs). KZFP genes are preferentially encoded nearby the activated HERVs in tumors and transcriptionally regulated by these adjacent HERVs. Increased HERV and KZFP expression in tumors was associated with better disease conditions. Increased KZFP expression in cancer cells altered the expression of genes related to the cell cycle and cell-matrix adhesion and suppressed cellular growth, migration, and invasion abilities. Our data suggest that HERV activation in tumors drives the synchronized elevation of KZFP expression, presumably leading to tumor suppression.
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