角质细胞的遗传演变成为皮肤状细胞癌
Bishal Tandukar1,2,3, Delahny Deivendran1,2,3, Limin Chen1,2
1Department of Dermatology, University of California San Francisco, San Francisco, CA, USA.
bioRxiv : the preprint server for biology
|August 2, 2024
概括
皮肤癌的进展涉及关键的遗传突变. 角质细胞中的某些突变会增加突变率,导致从癌前病变发展起状细胞癌.
科学领域:
- 在瘤学瘤学.
- 皮肤病学 皮肤病学
- 遗传学 是一个遗传学.
背景情况:
- 皮肤癌,特别是皮肤状细胞癌 (cSCC),是一个重大的公共卫生问题.
- 了解皮肤致癌的分子驱动因素对于开发有效的预防和治疗策略至关重要.
研究的目的:
- 阐明在cSCC发育过程中的多原子分子转变,从正常的角质细胞转变为癌前的动态角质瘤 (AKs) 和侵入性瘤.
- 识别特异性突变和分子变化,这些突变和分子变化是皮肤致癌的每个阶段的特征.
主要方法:
- 皮表皮质角质细胞,AKs和cSCCs的多原子分析 (基因组学,转录组学).
- 单细胞突变分析以评估突变负担并确定特定的遗传改变.
- 在瘤微环境中分析基因表达模式和免疫细胞透.
主要成果:
- 大多数角质细胞具有较低的突变负担,但TP53或NOTCH1中的突变显著增加了突变率,可能启动转化.
- TERT促进器和CDKN2A突变是AK发育的早期事件,而ARID2无活化和MAPK通路激活标志着向cSCC的过渡.
- 不相关新生体的碰撞很常见,因为AKs通常与相邻的cSCCs没有克隆关系.
- 观察到基因表达的空间异质性和瘤侵袭前端检查点分子的高表达.
结论:
- 这项研究提供了cSCC.进化的关键分子事件的全面目录.
- 致病突变可以破坏细胞对紫外线辐射的适应机制,增加对癌症发展的易感性.
- 这些发现突出了复杂的克隆进化和瘤微环境动态在皮肤致癌.
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