新的小儿肿瘤鉴定可以帮助预测化学反应
![Single-cell analysis of hepatoblastoma identifies tumor signatures that predict chemotherapy susceptibility using patient-specific tumor spheroids. a) Flowchart of tissue processing of HB tumor and adjacent paired normal tissue samples for single-cell RNA sequencing and patient-derived spheroid culture. b) Uniform manifold approximation and projection (UMAP) of 29,968 cells from nine HB patients, annotated by cell types. c) Dot plot of all identified populations, each characterized by three known cell type markers. Average expression was indicated by the color gradient, and the percentage of marker expressed was represented by the dot size. d) Stacked bar charts showing the contribution of the two sample types (normal and tumor) to each cell population, ranked by the contribution from normal samples. e) Estimated copy-number alteration profile of all tumor and tumor-associated cell clusters using all the non-tumor and non-tumor-associated cells as reference. Chromosomes are labeled on the horizontal axis. Estimated copy numbers are shown in blue (deletion) and red (amplification) color bars. f) Stacked bar charts show the contribution of the nine patients to each cell population. Credit: <i>Nature Communications</i> DOI: 10.1038/s41467-022-32473-z 新的小儿肿瘤鉴定可以帮助预测化学反应](https://scx1.b-cdn.net/csz/news/800a/2022/new-pediatric-tumor-id.jpg)
一项新的UCSF研究阐明了最常见的小儿肝肿瘤类型的多样性,并为更精确的化学疗法提供了前进的方向。
该研究发表在自然通讯,使用单细胞转录组技术来分析来自婴儿和四岁以下儿童的肝母细胞瘤标本。从九个样本中,研究人员发现了五个肝母细胞瘤瘤可能解释该癌症异质性的签名,并且可以预测对化疗治疗的反应。
“许多小儿肿瘤起源于胚胎细胞,有些是由于其突变负担而平淡的。”研究的共同作者Amar Nijagal说,旧金山UCSF Benioff儿童医院儿科外科助理教授。“这种肿瘤具有很大的异质性,这一事实使我们质疑是什么推动了这种异质性,我们想了解更多。”
来自UCSF的三个不同实验室的研究人员从事这项研究,结合了儿科手术,肝病学和基因组学专业知识,这促进了直接从肿瘤直接分析肿瘤的罕见机会。手术室,尼贾加尔说。
“借助UCSF的一个地方,我们可以预见到儿童出现肝肿瘤的情况;我们的活检;我们了解其肿瘤特征;我们在某种程度上生长和测试治疗剂培养皿;我们使用发现的东西来治疗患者。”尼贾加尔说。
Nijagal说,除了提供更好的治疗希望外,研究肝母细胞瘤还可以介绍组织正常发展的窗口。
Nijagal说:“正常发育和癌症是同一枚硬币的两个方面。”“在这里,您的肿瘤没有得到任何肿瘤,因为许多成年肿瘤来自吸烟或过量的紫外线暴露。相反,开发过程中出现了问题,以使这些肝细胞发展为恶性肿瘤。因此,我们有兴趣了解什么是信号,例如来自免疫细胞- 维护正常发展。”
进一步探索