细胞表面蛋白质的定量评估,以确定胆管癌的新疗法标
Barney Stephenson1, Neil Shimwell2, Elizabeth Humphreys1
1NIHR Biomedical Research Unit and Centre for Liver Research, University of Birmingham, Birmingham, UK.
Lancet (London, England)
|August 28, 2015
概括
这项研究确定了胆管癌中271种细胞表面蛋白,包括癌症干细胞的新疗法标和标记物. 这些发现可能会改善这种致命癌症的诊断和治疗策略.
科学领域:
- 生物化学
- 蛋白质组学
- 癌症生物学
背景情况:
- 胆管癌 (胆管癌) 的预后和存活率很差.
- 区分远端胆管癌和胰腺癌是一项挑战,可能会延迟最佳治疗.
- 蛋白质组学提供了一种研究细胞蛋白质的方法,以获得诊断和治疗的见解.
研究的目的:
- 使用蛋白质组学识别胆管癌细胞表面的组成蛋白质.
- 发现用于胆管癌分期,干细胞鉴定和分化的新生物标志物.
- 探索胆管癌的潜在治疗点.
主要方法:
- 开发了一种经过修改的NeutrAvidin-生物素系统,以丰富CC-SW-1胆管癌细胞系的细胞表面蛋白质.
- 采用双重质谱测量进行分析,使用Mascot算法对 NCBInr 数据库进行搜索.
- 通过切除瘤样本的免疫组织化学检测证实了这一发现.
主要成果:
- 成功丰富和识别了862个一致表达的蛋白质,其中271个定位在细胞表面.
- 已知标记物如细胞素19 (CK19) 和上皮细胞粘附分子 (EpCAM).
- 发现了新的标志物,包括TNF受体超级家族中的标志物,以及像Notch这样的途径.
结论:
- 表面蛋白质分析为确定胆管癌的新治疗点提供了基础.
- 这种技术有可能区分远端胆管癌和胰腺癌.
- 进一步的研究可以将这些蛋白质学发现转化为临床应用,以改善患者的治疗结果.
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