表观遗传平衡确保了MLL放大和重排的机械控制
Zach H Gray1, Damayanti Chakraborty2, Reuben R Duttweiler3
1Cancer Epigenetics Institute, Fox Chase Cancer Center, Philadelphia, PA 19111, USA; Nuclear Dynamics and Cancer Program, Fox Chase Cancer Center, Philadelphia, PA 19111, USA; Institute for Cancer Research, Fox Chase Cancer Center, Philadelphia, PA 19111, USA.
Cell
|October 3, 2023
概括
在白血病中表观遗传调节器控制MLL/ KMT2A放大和重组. 基因组甲基化平衡和MLL/KMT2A位点的CTCF占用是关键,提供潜在的药物标.
科学领域:
- * 分子生物学
- * 癌症表观遗传学
- * 血液性恶性瘤
背景情况:
- 在各种白血病中,MLL/ KMT2A的放大和转移是常见的.
- * 导致这些变化的分子机制在很大程度上是未知的.
- 了解这些机制对于开发向治疗至关重要.
研究的目的:
- * 阐明控制MLL/KMT2A位点变化的表观遗传调节剂.
- * 调查素H3氨酸9甲基化 (H3K9me1/2) 在MLL/KMT2A重组中的作用.
- * 探索化疗对这些表观遗传修饰和MLL/ KMT2A变化的影响.
主要方法:
- * 在MLL/KMT2A位点对基因组甲基化水平 (H3K9me1/2) 的分析.
- * 调查CTCF占用率及其与MLL/KMT2A变化的相关性.
- * 细胞和动物模型中关键表观遗传调节剂 (KDM3B,G9a/EHMT2,CTCF) 的耗尽和过度表达研究.
- * 评估多克索鲁比辛对蛋白质含量和MLL/ KMT2A变化的影响.
主要成果:
- 在MLL/KMT2A位置的H3K9me1/2平衡调节了放大和重排.
- *KDM3B的耗尽增加了H3K9me1/2,减少了CTCF的占用,并促进了MLL/KMT2A的改变.
- * 多克索鲁比辛抑制KDM3B和CTCF,导致MLL/ KMT2A的改变,可通过KDM3B和CTCF的过度表达来挽救.
- * G9a抑制抑制了多克索鲁素诱导的MLL/ KMT2A事件.
结论:
- *表观遗传调节器,特别是KDM3B,G9a/EHMT2和CTCF之间的相互作用,控制MLL/KMT2A的放大和重排.
- * 这些表观遗传机制与治疗诱导的白血病有关.
- * 已识别的表观遗传调节剂代表了治疗MLL/ KMT2A驱动型白血病的可控药物标.
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