在微卫星稳定的差差分化的甲状腺癌中,免疫治疗反应具有不匹配修复缺陷和高瘤突变负担
João Henrique Feldmann1, João Felipe Feldmann1, Cassio Murilo Hidalgo-Filho1
1Hospital Sírio-Libanês Departamento de Oncologia Clínica São Paulo SP Brasil Departamento de Oncologia Clínica, Hospital Sírio-Libanês, São Paulo, SP, Brasil.
Archives of endocrinology and metabolism
|February 6, 2026
概括
这项案例研究强调了一名患有差分甲状腺癌 (PDTC) 的患者,该患者对免疫疗法反应良好. 像DNA修复基因突变这样的替代生物标志物可以预测微卫星稳定的PDTC的反应.
科学领域:
- 在瘤学瘤学.
- 遗传学 是一个遗传学.
- 免疫治疗是一种免疫疗法.
背景情况:
- 差差分化的甲状腺癌 (PDTC) 是一种具有有限治疗选择的侵袭性癌症.
- 标准免疫疗法生物标志物 (微卫星不稳定性高,高瘤突变负担) 在PDTC中罕见.
- 识别替代预测生物标志物对于有效治疗至关重要.
研究的目的:
- 报告一个具有微卫星稳定性 (MSS) 的PDTC病例,该病例对免疫治疗有反应.
- 探索替代生物标志物来预测PDTC中的免疫治疗反应.
主要方法:
- 一个PDTC瘤的分子概况.
- 分析包括瘤突变负担 (TMB),基因突变 (MSH2,ATM),微卫星稳定性 (MSS) 和PD-L1表达.
- 基于分子发现的布罗利祖马布治疗.
主要成果:
- 该患者患有MSS,边界TMB (10mut/Mb),以及MSH2和ATM的突变.
- 观察到MSH2/MSH6表达的完全丧失和20%的PD-L1表达.
- 布罗利祖马布治疗导致持续的部分反应持续了七个月,耐受性良好.
结论:
- 患有MSS的PDTC可以对免疫疗法产生显著的反应.
- 在DNA修复基因 (例如,MSH2,ATM) 中的体质突变可能作为免疫治疗的替代生物标志物.
- 分子分析对于识别PDTC中免疫检查点阻塞的潜在响应者至关重要.
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