皮肤表皮中的代谢重新连接驱动了对瘤原性突变的耐受性
Anupama Hemalatha1, Zongyu Li2, David G Gonzalez1
1Department of Genetics, Yale School of Medicine, New Haven, CT, USA.
Nature cell biology
|January 6, 2025
概括
皮肤干细胞 皮肤干细胞
科学领域:
- 细胞生物学 细胞生物学
- 代谢途径 代谢途径
- 瘤发生的发生因子.
背景情况:
- 皮肤上皮干细胞维持组织平衡.
- 致癌突变可以破坏正常细胞的竞争.
- 不同的瘤基因引起不同的细胞反应和竞争结果.
研究的目的:
- 为了研究与瘤突变细胞相互作用的野生类型干细胞的代谢变化.
- 了解细胞氧化还原状态如何影响细胞竞争动态.
- 探索调节代谢状态的治疗潜力.
主要方法:
- 随着时间的推移,单细胞分辨率跟踪内源性氧化还原比 (NAD(P) H/FAD) 在小鼠中.
- 13C液态染色学-双重质谱学用于分析代谢流量.
- 使用甲胺的药理干预,以评估其对突变表型和细胞竞争的影响.
主要成果:
- 两种β-catenin-gain-of-function (βcatGOF) 和HrasG12V突变都会诱导细胞氧化还原比率的快速下降.
- 与HrasG12V突变细胞相比,βcatGOF中的氧化还原差异持续时间更长.
- 突变的表皮表现出通过氧化三酸循环增加的葡萄糖利用率.
- 甲胺治疗逆转了细胞竞争的结果,并抑制了下游突变表型.
结论:
- 细胞代谢状态,特别是氧化还原平衡,是细胞竞争结果的关键决定因素,以应对致癌突变.
- 向代谢途径,如甲胺,提供了一个潜在的治疗策略,以抵消瘤效应并恢复组织平衡.
- 脱氧变化的独特时间动态与不同的瘤基因诱导的细胞竞争策略相关.
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