从临床标本中提取质子,通过质谱法进行表观遗传分析
Giulia Robusti1, Paola Fulghieri2, Tiziana Bonaldi3
1Department of Experimental Oncology, IEO, European Institute of Oncology IRCCS.
Journal of visualized experiments : JoVE
|December 8, 2025
概括
这项研究引入了一种从各种癌症样本中提取组织蛋白的新方法. 这种技术可以对组织蛋白修饰进行详细分析,有助于癌症的表征和生物标志物的发现.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 癌症生物学 癌症生物学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 表观遗传机制,包括基因组变异和翻译后修饰 (PTMs),在癌症的发展和进展中起着至关重要的作用.
- 改变的基因组PTM模式在癌症中很常见,可以作为诊断和预后生物标志物.
- 需要强大的方法来分析临床样本中的组分子PTMs,以便全面的瘤特征.
研究的目的:
- 从各种临床癌症样本中开发和介绍一种有效提取质子的协议.
- 为癌症表观遗传学研究提供基因组PTMs的公正和全面的分析.
- 促进用于癌症诊断和预后的新型表观遗传生物标志物的识别.
主要方法:
- 开发了一种从快速冷,OCT冷和FFPE临床活检中有效提取组蛋白的协议.
- 使用高性能液体色谱与并联质谱 (LC-MS/MS) 进行自下而上的蛋白质组分析.
- 专注于检测和量化关键的质子修饰,特别是 lysine 乙化和甲基化.
主要成果:
- 从各种临床样本类型中成功提取了高质量和足够数量的组织蛋白质.
- 证明了LC-MS/MS工作流程的功能,以稳定检测和定量质子PTMs.
- 能够对原发性瘤样本中的组织蛋白修饰进行详细分析,为表观遗传景观提供了洞察力.
结论:
- 本协议为在临床癌症样本中进行综合性组织蛋白PTM分析提供了宝贵的工具.
- 这种方法提高了瘤表观遗传学的特征,可能导致新的诊断和预后生物标志物.
- 该工作流支持将表观遗传数据集成到多层癌症分子分析中.
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