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NELFE的相分离调节染色质可及性以促进肝细胞癌中的二分信号通路。

Phase separation of NELFE modulates chromatin accessibility to promote dichotomous signaling pathways in hepatocellular carcinoma.

作者信息

Dang Hien, Lucci Alvaro, Barry Anna, Johnson Victoria, Ruiz Brittany, Reynolds Laura, Wojnar Adam, Chewe Kasonde, Pomyen Yotsawat, Eckert Christoph, Zhang Kai, Hill Jason, Shah Ashesh, Bodzin Adam, Grabocka Elda, Gaida Matthias, Fawzi Nicolas

机构信息

Thomas Jefferson University.

Brown University.

出版信息

Res Sq. 2025 Apr 25:rs.3.rs-5843408. doi: 10.21203/rs.3.rs-5843408/v1.

DOI:10.21203/rs.3.rs-5843408/v1
PMID:40313774
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12045374/
Abstract

Biomolecular condensates partition various cellular processes including transcription, DNA repair, and RNA metabolism. We report NELFE, a member of the Negative Elongation Factor complex required for Polymerase II (Pol II) pausing, forms distinct foci mediated by two low complexity sequences. We show NELFE is oncogenic in hepatocellular carcinoma (HCC) by undergoing liquid-liquid phase separation (LLPS) with SMARCB1 to modulate chromatin accessibility to downregulate pro-apoptotic genes through Pol II pausing while activating pro-growth signals to promote HCC progression. Our work highlights the importance of NELFE LLPS as a mechanism of chromatin accessibility to regulate both paused and non-paused genes to drive tumorigenesis in hepatocellular carcinoma.

摘要

生物分子凝聚体分隔了包括转录、DNA修复和RNA代谢在内的各种细胞过程。我们报告称,负向延伸因子复合物(Negative Elongation Factor complex)的成员NELFE是聚合酶II(Pol II)暂停所必需的,它由两个低复杂性序列介导形成不同的焦点。我们发现,在肝细胞癌(HCC)中,NELFE通过与SMARCB1进行液-液相分离(LLPS)而具有致癌性,从而调节染色质可及性,通过Pol II暂停下调促凋亡基因,同时激活促生长信号以促进HCC进展。我们的工作突出了NELFE液-液相分离作为一种染色质可及性机制的重要性,该机制可调节暂停和非暂停基因,从而驱动肝细胞癌的肿瘤发生。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/bc101513efcc/nihpp-rs5843408v1-f0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/a9d1b6206e7e/nihpp-rs5843408v1-f0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/10d9923ba47b/nihpp-rs5843408v1-f0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/5dc8213c714e/nihpp-rs5843408v1-f0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/3213b50ddb6d/nihpp-rs5843408v1-f0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/781776af315b/nihpp-rs5843408v1-f0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/bc101513efcc/nihpp-rs5843408v1-f0006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/a9d1b6206e7e/nihpp-rs5843408v1-f0001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/10d9923ba47b/nihpp-rs5843408v1-f0002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/5dc8213c714e/nihpp-rs5843408v1-f0003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/3213b50ddb6d/nihpp-rs5843408v1-f0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/781776af315b/nihpp-rs5843408v1-f0005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ff10/12045374/bc101513efcc/nihpp-rs5843408v1-f0006.jpg

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本文引用的文献

1
A disordered region controls cBAF activity via condensation and partner recruitment.一个紊乱区域通过凝聚和伙伴招募来控制 cBAF 活性。
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Phase separation of low-complexity domains in cellular function and disease.细胞功能和疾病中低复杂度结构域的相分离。
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RNA polymerase II pausing factor NELF in CD8 T cells promotes antitumor immunity.CD8 T细胞中的RNA聚合酶II暂停因子NELF可促进抗肿瘤免疫。
Nat Commun. 2022 Apr 20;13(1):2155. doi: 10.1038/s41467-022-29869-2.
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Phase Separation Mediates NUP98 Fusion Oncoprotein Leukemic Transformation.液-液相分离介导 NUP98 融合癌蛋白白血病转化。
Cancer Discov. 2022 Apr 1;12(4):1152-1169. doi: 10.1158/2159-8290.CD-21-0674.
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Glycogen accumulation and phase separation drives liver tumor initiation.糖原积累和相分离驱动肝肿瘤发生。
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Quantifying the phase separation property of chromatin-associated proteins under physiological conditions using an anti-1,6-hexanediol index.利用抗 1,6-己二醇指标定量生理条件下染色质相关蛋白的相分离特性。
Genome Biol. 2021 Aug 17;22(1):229. doi: 10.1186/s13059-021-02456-2.
8
Struggle for survival: new insights into NELF condensation for adaptive transcriptional reprogramming.生存之战:NELF凝聚促进适应性转录重编程的新见解
Mol Cell. 2021 Mar 4;81(5):896-898. doi: 10.1016/j.molcel.2021.02.008.
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Stress-induced nuclear condensation of NELF drives transcriptional downregulation.应激诱导 NELF 的核浓缩驱动转录下调。
Mol Cell. 2021 Mar 4;81(5):1013-1026.e11. doi: 10.1016/j.molcel.2021.01.016. Epub 2021 Feb 5.
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