微卫星不稳定性和不匹配修复蛋白质缺乏:相同的预测标记?
Maja L Nádorvári1, Gábor Lotz1, Janina Kulka1
1Department of Pathology, Forensic and Insurance Medicine, Semmelweis University, Budapest, Hungary.
Pathology oncology research : POR
|April 24, 2024
概括
不匹配修复 (MMR) 蛋白质IHC和微卫星不稳定性 (MSI) 测试可能不等同于预测免疫治疗反应. MMR缺乏症和MSI状态之间的差异引发了对当前临床指南的质疑.
科学领域:
- 在瘤学瘤学.
- 分子病理学分子病理学
- 癌症免疫学 癌症免疫学
背景情况:
- 临床指南建议进行不匹配修复 (MMR) 蛋白质免疫组织化学 (IHC) 或微卫星不稳定性 (MSI) 测试,以预测免疫疗法的疗效.
- MMR 蛋白质 IHC 经常被认为是黄金标准,MSI 测试只适用于特定情况或林奇综合征查.
研究的目的:
- 评估MMR蛋白IHC和MSI测试作为癌症免疫治疗的预测生物标志物的等价性.
- 在不同癌症类型和表型中调查MMR缺乏和MSI状态之间的差异.
主要方法:
- 对分子流行病学研究的审查,比较MMR IHC和MSI测试结果.
- 分析文献报告MMR IHC和MSI测试之间的差异,特别是在非结肠直肠/子宫内膜癌.
- 通过dMMR对患者选择进行相关的临床数据的检查与MSI状态与免疫治疗结果对比.
主要成果:
- 研究报告不同癌症类型的MMR (dMMR) 和MSI缺陷率不同.
- 观察到MMR IHC和MSI测试之间的显著差异,特别是在不太常见的癌症和不寻常的dMMR表型中.
- 临床数据表明,免疫检查点抑制剂的疗效差异取决于dMMR或MSI状态是否引导患者选择.
结论:
- 假设dMMR表型和MSI状态是免疫治疗的可互换的预测标记,需要重新评估.
- 当前的指导方针可能需要修订,以考虑到观察到的差异及其临床影响.
- 需要进一步的研究来澄清MMR IHC和MSI测试在免疫疗法选择中的不同作用和预测值.
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