转录因子SOX6通过转录因子LIN28B基因的转录抑制
Valentina Pastori1, Gianluca Zambanini2,3,4, Elisabetta Citterio1
1Dipartimento di Biotecnologie e Bioscienze, Università degli Studi di Milano-Bicocca, Milan, Italy.
Scientific reports
|May 4, 2024
概括
转录因子SOX6抑制LIN28B的表达,影响胎儿/成人基因切换和癌细胞增殖. 这种SOX6介导的LIN28B下调可能通过阻断细胞分裂来限制瘤生长.
科学领域:
- 发展生物学 发展生物学
- 癌症生物学 癌症生物学
- 分子遗传学 分子遗传学
背景情况:
- 胎儿瘤基因的异常重新激活,如LIN28B,驱动癌症的进展.
- 了解LIN28B转录调节对于发育生物学和瘤学至关重要.
- 在胎儿到成年人的过渡期间控制LIN28B表达的机制在很大程度上是未知的.
研究的目的:
- 为了研究LIN28B表达的调节机制.
- 为了确定参与胎儿/成人基因表达切换的因素.
- 探索SOX6在LIN28B调节中的作用及其对细胞增殖的影响.
主要方法:
- 定量的RT-PCR分析.
- 单细胞RNA测序数据分析.
- 在各种细胞系 (红色素瘤,肝母细胞瘤,神经母细胞瘤) 中进行过度表达的研究.
主要成果:
- SOX6表达与红色素形成期间的LIN28BmRNA下降相反相关.
- 在多种细胞类型中,SOX6过度表达显著抑制了LIN28B.
- SOX6在物理上与LIN28B位点结合,表明直接的转录抑制.
- LIN28B/Let-7目标 (MYC,IGF2BP1) 的下调,导致细胞增殖迅速停止.
结论:
- SOX6直接抑制了LIN28B转录,有助于胎儿/成年人红色受体切换.
- SOX6介导的LIN28B下调可能作为限制癌细胞增殖的机制.
- 这一发现提供了对发育基因调节和对LIN28B驱动癌症的潜在治疗策略的见解.
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