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2D和3D空间中的瘤演变和微环境相互作用

Chia-Kuei Mo^1,2, Jingxian Liu^1,2, Siqi Chen^1,2

¹Department of Medicine, Washington University in St Louis, St Louis, MO, USA.

|October 31, 2024

概括

这项研究揭示了癌细胞在瘤中的空间相互作用,

科学领域:

癌症生物学与空间科学

背景情况:

了解癌症和非癌症细胞之间的空间相互作用对于破译瘤异质性和进化至关重要.
瘤微环境是复杂的,空间组织影响癌症的进展和治疗反应.

研究的目的:

通过使用多组空间分析,研究各种瘤类型中的空间组织和细胞相互作用.
根据细胞组成和遗传变化定义和描述瘤微区域和空间亚克隆.
探索瘤的3D空间结构及其与免疫细胞透和衰竭的关系.

主要方法:

在6种癌症类型的131个瘤部分进行了视觉空间转录学 (ST).
与单核RNA测序 (snRNA-seq) 和通过索引 (CODEX) 的数据进行整合.
使用串行ST段进行3D重建,并应用深度学习进行免疫微环境分析.

主要成果:

确定的"瘤微区域"和"空间子克隆",具有明显的遗传变异和致癌活动.
在微区域内确定了空间代谢活动梯度和抗原呈现模式.
具有特征的可变免疫细胞透,T细胞在微区域内和巨细胞在边界;在3D中确定了免疫热/冷社区和免疫疲劳标记.

结论:

瘤微区域和亚克隆内的空间组织和相互作用对瘤生物学有重大影响.
3D瘤结构影响免疫细胞分布和免疫逃避策略.
这项研究为理解空间瘤演变和微环境动态提供了全面的框架.

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