在前列腺癌中激活BRAF变化的独特光谱
Alex Chehrazi-Raffle1, Hanna Tukachinsky2, Eamon Toye3
1City of Hope Comprehensive Cancer Center, Duarte, California.
概括
在大约3%的前列腺癌中发生BRAF变异,主要是II类突变和重组,而不是V600突变. 这种独特的BRAF激活模式需要进一步研究针对MAPK通路的向疗法.
科学领域:
- 在瘤学瘤学.
- 基因组学就是基因组学.
- 分子生物学分子生物学
背景情况:
- 在前列腺癌的3-5%中发现了BRAF变异,但它们的特异性需要进一步研究.
- 综合基因组分析 (CGP) 提供了一种方法,在大量患者队列中表征这些变化.
研究的目的:
- 使用CGP. 用于描述前列腺癌中BRAF变化的性质.
- 为了比较前列腺癌与其他癌症类型的BRAF变异概况.
- 调查BRAF变异与患者祖先的关联.
主要方法:
- 使用了FoundationOne CDx和FoundationOne Liquid CDx CGP测定用于组织和液体活检.
- 分析了15864个前列腺癌组织活检和大量非前列腺癌组织活检 (n=275,151) 进行比较.
- 采用基于单核酸多态 (SNP) 的方法来预测遗传祖先.
主要成果:
- 在3.3%的前列腺癌组织活检中发现了激活BRAF的变化,其中II类变化 (重新排列,K601E,G469A) 是最常见的.
- 与BRAF野生型相比,BRAF改变的前列腺癌显示了CDK12突变的丰富和TMPRSS2融合,PTEN和APC变化的枯竭,与BRAF野生型相比.
- 与欧洲血统相比,在非洲和亚洲血统的患者中,BRAF变化明显更为普遍.
结论:
- 大约3%的前列腺癌携带激活BRAF变异,主要是II类突变和重组,罕见的V600突变.
- 前列腺癌中BRAF激活的独特模式表明它不同于其他癌症类型.
- 这些发现支持对BRAF向疗法的进一步临床研究,特别是那些抑制基因激活蛋白激酶 (MAPK) 途径的疗法.
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