多原子分析揭示了一种连续的分化谱和Wnt-MDK驱动的免疫逃避在肝细胞瘤中
Daniel Münter1, Flavia W de Faria1, Mathis Richter2
1Department of Pediatric Hematology and Oncology, University Children's Hospital Münster, Münster, Germany.
Journal of hepatology
|February 3, 2025
概括
儿科肝母细胞瘤细胞表现出差异化谱和改变的免疫微环境. Wnt信号驱动中 (MDK) 表达,通过修改巨细胞促进免疫逃避,提供潜在的治疗点.
科学领域:
- 儿科瘤学 儿科瘤学
- 癌症免疫学 癌症免疫学
- 分子生物学分子生物学
背景情况:
- 肝母细胞瘤是最常见的儿科肝癌,通常是由Wnt/β-catenin路径突变驱动的.
- 了解瘤微环境对于开发新疗法至关重要,但它在儿科癌症中仍未得到充分研究.
- 这项研究解决了肝细胞瘤免疫格局及其在疾病进展中的作用方面的知识差距.
研究的目的:
- 为了全面分析肝细胞瘤瘤微环境.
- 阐明肝细胞瘤内的空间结构和关键信号机制.
- 为了确定小儿肝癌的新型治疗点.
主要方法:
- 在儿科肝细胞母细胞瘤样本上对单细胞/核RNA测序,空间转录组学和多重免疫光学进行综合分析.
- 使用大量的肝细胞瘤,非瘤和胎儿肝脏样本的RNA-seq队列以及健康的免疫细胞进行验证.
- 在肝细胞母细胞瘤和巨细胞系的实验验证,使用西方涂抹和RNA-seq.
主要成果:
- 确定了四个转录性瘤程序:"发育"",代谢"",循环"和"中间",与差异化,不差异化和患者结果相关.
- 揭示了抗炎和促炎免疫细胞的比率增加以及瘤区域内的免疫排除.
- 在肝细胞母细胞瘤细胞中,证明了Wnt-响应的中基因 (MDK) 上调,改变了巨细胞的表型,并导致免疫逃避,部分通过MDK抑制可逆.
结论:
- 肝细胞母细胞瘤细胞表现出连续的分化谱,并且存在于改变的免疫微环境中.
- 通过调节巨细胞,Wnt信号诱导的中 (MDK) 表达在免疫逃避中发挥作用.
- 通过破坏免疫逃避机制,Midkine成为肝细胞瘤的潜在治疗点.
相关概念视频
Canonical Wnt Signaling Pathway
The gene encoding the main signaling molecules of the Wnt signaling pathways (the Wnt proteins) was discovered almost four decades ago by Nüsslein-Volhard and Wieschaus. They identified and originally named the gene "wingless" (wg) after a phenotype discovered during their landmark genetic screen in Drosophila for body pattern defects. At around the same time, another researcher named Harold Varmus found that a murine tumor virus activates the mammalian wg homolog, Int-1, which results in tumor...
Non-Canonical Wnt Signaling Pathways
Wnt is a zygotic effect gene that is expressed during very early embryonic development. It regulates various processes in animals starting from early development through the adult stage, such as organogenesis in the embryo and maintenance of neuronal and blood stem cells. Wnt proteins can induce a wide variety of intracellular pathways depending upon the specific abilities of different Wnt ligands to form a complex with shared and cognate receptors in the presence of different co-receptors. The...


