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在癌症化疗和免疫治疗中,EHMT1和EHMT2的功能不同

Zhihua Kang^1,2, Pan Fu^1,2,3, Hui Ma^1,2,4

¹Rutgers Cancer Institute of New Jersey, New Brunswick, NJ, USA.

bioRxiv : the preprint server for biology

|October 24, 2023

概括

EHMT1/2抑制剂揭示了EHMT1和EHMT2在DNA复制和STING激活中的不同作用. 这项研究为结合化剂与免疫检查点抑制剂在癌症治疗中提供了分子基础.

科学领域:

生物化学生化学
分子生物学分子生物学
癌症研究癌症研究

背景情况:

EHMT1 (GLP) 和EHMT2 (G9a) 是相关的甲基转移酶,通常作为异构分子起作用.
它们参与了关键的细胞过程,如转录调节,DNA修复和基因组甲基化.

研究的目的:

研究EHMT1和EHMT2在细胞过程中的不同作用及其治疗影响.
阐明EHMT1/2抑制剂作用背后的分子机制.

主要方法:

在三阴性乳腺癌的小鼠模型中使用了EHMT1/2抑制剂.
评估了DNA复制分叉进展,细胞质DNA积累和STING表达.
研究了STING1促进体中LIG1和CpG位点的甲基化状态.
研究了UHRF1在STING调节中的作用.

主要成果:

抑制EHMT1/2导致复制压力,细胞质DNA和增加STING表达.
通过LIG1甲基化,EHMT1损失主要影响了DNA复制和对化剂的敏感性.
EHMT2损失主要是导致STING表达升高和免疫治疗反应的原因.
确定了一个独特的EHMT2-UHRF1轴,调节DNA甲基化和STING1转录.

结论:

EHMT1和EHMT2具有不同的功能,挑战了排他性的异构化概念.
EHMT1/2抑制剂通过不同的机制强化化疗和免疫疗.
这些发现为涉及化剂和免疫检查点抑制剂的组合疗法提供了分子理由.

关键词:

通过DNA甲基化.在EHMT1中,在EHMT2中使用.在LIG1中,LIG1是指LIG1.刺痛是一种刺痛.在UHRF1中,UHRF1是化疗化疗是一种化学疗法.免疫疗法免疫疗法复制压力是复制的压力.

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