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管道癌 in situ 在形态上正常的管道中发生在突变细胞的克隆场内
Stefan J Hutten1,2, Hendrik A Messal1,2, Esther H Lips1
1Division of Molecular Pathology, The Netherlands Cancer Institute, Amsterdam, The Netherlands.
The Journal of pathology
|May 23, 2024
概括
癌前乳腺病变,管道癌 in situ (DCIS),往往发生在基因改变的看起来正常的乳腺管道领域内. 空间解析的基因组学揭示了DCIS和相邻的正常组织之间共享的DNA异常.
科学领域:
- 基因组不稳定性和癌症的发展.
- 乳腺病理和前恶性病变.
- 空间基因组学和组织架构
背景情况:
- 突变在健康的乳腺组织中很常见,但它们在早期病变形成中的作用尚不清楚.
- 了解突变的空间分布对于识别癌症起源至关重要.
- 在形态上正常的上皮和癌前病变之间的关系需要进一步研究.
研究的目的:
- 研究正常乳腺上皮和直管癌 in situ (DCIS) 之间的克隆和空间关系.
- 通过3D成像和空间解析基因组学,在DCIS和相邻的正常组织中映射DNA复制数异常 (CNA) 概况.
- 为了确定前恶性转变是否起源于看起来正常的管道的基因改变领域.
主要方法:
- 开发一个3D成像管道用于档案,甲固定乳腺组织.
- 空间解析基因组学的应用用于绘制DNA复制数异常 (CNA) 的地图.
- 管道子树的3D重建,以分析与组织架构相关的CNA配置文件.
主要成果:
- 在DCIS病变中观察到局部异质性有限.
- 在50%的病例中 (8/16),相邻的形态正常表皮与DCIS共享重叠的结构变异 (CNA).
- 空间测绘显示,前恶性病变经常发生在基因改变的正常导管的克隆场内.
结论:
- 恶性前乳腺病变,如DCIS,通常发生在基因突变的,形态上看起来正常的导管领域内.
- 空间解析基因组学是了解癌症的克隆进化的一个强大的工具.
- 这些发现表明,在一个模型中,在正常组织中广泛的遗传变化会导致病变的形成.
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