皮下与正正体植入物对患者衍生异体移植转录形状的影响
Yanghui Sheng1, Zixuan Xie2, Jingjing Wang3
1Crown Bioscience (Suzhou) Inc., Suzhou, China.
Cancer research communications
|May 12, 2025
概括
患者衍生异种移植 (PDX) 模型显示,瘤基因表达在皮下和正位点之间一致. 然而,植入位置会影响瘤的微环境,在临床前癌症研究中影响 stromal 基因表达.
科学领域:
- 在瘤学瘤学.
- 临床前癌症模型
- 基因组学就是基因组学.
背景情况:
- 患者衍生异种移植 (PDX) 是重要的临床前模型,模仿人类瘤组织学和分子形状.
- 皮下 (s.c.) 和体内 (ortho) PDX 模型被广泛使用,但它们的比较基因表达,特别是在瘤和树皮成分中,需要进一步澄清.
研究的目的:
- 在癌症研究中,比较皮下与正体患者衍生异种移植 (PDX) 的实用性.
- 分析和对比瘤 (人类) 和树皮 (老鼠) 基因表达特征在s.c.和正骨PDX模型之间.
- 为了确定受植入部位影响的保存和差异表达的基因.
主要方法:
- 在五种癌症类型中分析了45种匹配的皮下和正体患者衍生异种移植 (PDX) 模型.
- 利用大量RNA测序来评估人类瘤和小鼠 stromal 基因表达.
- 进行了差异性基因表达分析,以识别特定位置和保存的基因模式.
主要成果:
- 人类瘤基因表达在s.c.和ortho PDX模型之间高度保守,显示出类似的上皮细胞-介质细胞过渡,血管新生和茎度得分.
- 基于植入部位,小鼠 stromal 基因表达有显著差异,其中 orthotopic 模型更像本地组织环境.
- 一个瘤基因子集,包括基因组和核糖体蛋白质基因,在两个植入部位都显示出由瘤内在因素驱动的稳定表达.
结论:
- 植入部位显著影响PDX模型的树区,而瘤基因表达在很大程度上保持一致.
- 与皮下模型相比,正位体PDX模型可能提供更具代表性的瘤微环境.
- 这些发现指导了针对特定癌症研究应用和药物开发的适当PDX模型的选择.
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