基因组H3.3K36M突变重新编程了冠状细胞瘤的表观基因组
Dong Fang1, Haiyun Gan1, Jeong-Heon Lee2
1Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, 200 First Street SW, Rochester, MN 55905, USA.
Science (New York, N.Y.)
|May 28, 2016
概括
冠状细胞瘤中的H3. 3K36M突变破坏了基因组甲基化,导致基因表达变化和癌症特征. 这种表观遗传重编程有助于瘤的发展.
科学领域:
- 癌症学
- 表观遗传学
- 分子生物学
背景情况:
- 冠状母细胞瘤经常存在H3.3基因组变异的特定突变 (H3.3K36M).
- 在基因调节和瘤抑制中发挥关键作用.
研究的目的:
- 调查H3.3K36M突变如何影响H3K36甲基化模式.
- 阐明改变H3K36甲基化的功能后果.
主要方法:
- 在人类冠状细胞瘤和突变冠状细胞中分析H3K36甲基化水平.
- 评估H3.3K36M蛋白对H3K36甲基转移酶 (MMSET和SETD2) 的影响.
- 评估H3.3K36M冠状细胞中的基因表达变化和癌症相关的细胞行为.
主要成果:
- 通过抑制MMSET和SETD2, H3. 3K36M突变可以减少H3K36的甲基化.
- 在癌症途径中,H3.3K36M细胞的改变基因表达得到了丰富.
- H3.3K36M冠状细胞表现出殖民地形成的增加,细胞灭绝的抵抗力和分化缺陷.
结论:
- H3.3K36M蛋白重新编程了H3K36甲基化场景.
- 这种表观遗传重编程通过改变与癌症相关的基因表达和促进癌症细胞表型,有助于冠状腺瘤瘤发生.
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