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染色体组织控制着癌症干细胞的转录反应和可塑性
Yinu Wang1, Jane Frederick2,3,4, Karla Isabel Medina2,3,4
1Department of Obstetrics and Gynecology, Northwestern University, Chicago, IL, 60611, USA.
癌症干细胞 (CSCs) 呈现出增加的纳米级染色体包装,增强它们的转录可塑性和对化疗的反应. 用药物向这些表观遗传领域可以逆转茎状性并促进分化.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症生物学 癌症生物学
- 细胞可塑性 细胞可塑性
背景情况:
- 染色体组织对于调节基因表达,细胞可塑性和细胞命运至关重要.
- 癌症干细胞 (CSCs) 具有独特的特性,有助于瘤生长和治疗耐药性.
- 纳米级染色体包装在CSC干度和化疗反应中的作用仍然在很大程度上未被探索.
研究的目的:
- 调查染色体纳米级包装域在卵巢癌中对化疗的干度和反应中的参与.
- 与非CSC相比,描述CSC的表观遗传景观和转录异质性.
- 评估针对CSCs表观遗传修饰的治疗潜力.
主要方法:
- 光学光谱纳米传感技术用于评估色素纳米尺度包装.
- 在目标下的裂纹和标记 (CUT&Tag) 测序用于表观遗传标记映射 (H3K27me3,H3K4me3,H3K27ac).
- 对比的转录基因分析和药物诱导的表观遗传调制.
主要成果:
- 与非CSC相比,卵巢癌CSC显示出高调的纳米级染色体包装域.
- CSCs表现出增加的转录可塑性,其特征是平衡的基因 (H3K4me3 / H3K27me3) 和激活的途径 (视网醇代谢,抗氧化剂反应).
- 表观遗传药物降低了染色质包装的调节,促进了分化;Dot1L抑制剂通过阻断可塑性逆转了茎状.
结论:
- 细胞内核细胞含有上调的染色体包装域,有助于它们增强的转录和细胞可塑性.
- 这种可塑性使CSC能够适应压力,例如化疗治疗.
- 向表观遗传修饰剂提供了一个有希望的治疗策略,以克服CSC介导的耐药性并促进分化.
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