综合分析确定了三阴性乳腺癌亚型PI3K路径变化的变异性
Reva K Basho1, Li Zhao2, Jason B White2
1Ellison Institute of Technology, Los Angeles, CA.
JCO precision oncology
|March 14, 2024
概括
PI3K通路的改变在三阴性乳腺癌 (TNBC) 和影响治疗反应中很常见. 这些遗传变化,特别是在M和LAR亚型中,可以指导针对性治疗的开发,以改善结果.
科学领域:
- 在瘤学瘤学.
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 三重阴性乳腺癌 (TNBC) 在PI3K通路中经常出现变化.
- 介质细胞 (M) 和光雄激素受体 (LAR) TNBC亚型显示PI3K路径改变的发病率较高.
- 这些变化对各种TNBC亚型的具体影响尚不清楚.
研究的目的:
- 调查PI3K路径改变在不同TNBC亚型中的发生率.
- 为了将PI3K路径的改变与TNBC患者对新辅助疗法 (NAT) 的病理反应相关联.
- 了解TNBC亚型PI3K路径改变的临床意义.
主要方法:
- 在NAT临床试验中评估了177名可手术的TNBC患者的治疗前瘤样本.
- 根据Pietenpol标准将瘤分为七种TNBC亚型.
- 通过全外因子测序,RNA测序和免疫组织化学分析了32个PI3K通路激活基因的变化 (突变,PTEN损失).
主要成果:
- 在TNBC亚型之间观察到PI3K通路改变发生率的显著差异 (P < .01).
- 亚型LAR (81%),BL2 (79%) 和M (62%) 的变化率最高.
- 在LAR亚型 (P = .02) 中,PIK3CA突变与病理完整反应 (pCR) 相相关.
结论:
- PI3K路径的改变会影响TNBC中新辅助疗法反应.
- 向治疗有望改善结果,特别是在M和LAR TNBC患者中.
- 对于特定的TNBC亚型,对PI3K通路向剂的进一步研究是有必要的.
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