SCLC的亚型是通过系统治疗的内在和持久的特征
Ying-Chun Lo1, Joel Rivera-Concepcion2,3, George Vasmatzis4
1Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota.
JTO clinical and research reports
|September 21, 2023
概括
小细胞肺癌 (SCLC) 亚型在化疗后通常保持稳定. 罕见的病例表现出可塑性,NEUROD1占主导地位的SCLC转变为ASCL1占主导地位,这表明针对性治疗可能需要针对特定亚型进行调整.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- 小细胞肺癌 (SCLC) 是一种具有高复发率的侵袭性恶性瘤,尽管采用多模式治疗.
- 最近的进展包括SCLC亚型和针对特定亚型的向疗法的开发.
- 了解治疗后亚型可塑性对于优化治疗策略至关重要.
研究的目的:
- 为了评估SCLC亚型在配对的治疗前和治疗后样本中的可塑性.
- 为了研究化学疗法耐药性后潜在的亚型演变.
- 为开发新的,特定于亚型的向治疗方法提供信息.
主要方法:
- 分析了来自32名患者 (1998-2022) 的68个治疗前和治疗后SCLC样本.
- 针对ASCL1,NEUROD1和POU2F3进行免疫组织化学测试,以确定主导的亚型表达.
- 在化疗前后对亚型稳定性和转录因子表达的比较分析.
主要成果:
- 在88%的病例 (28/32) 中,SCLC亚型在治疗前和治疗后的标本之间保持一致.
- 化疗后转录因子表达水平基本稳定.
- 在40% (2/5) 的NEUROD1占主导地位的SCLC病例中观察到显著的可塑性,这些病例在治疗后转换为ASCL1占主导地位的表型.
结论:
- SCLC亚型通常在化学疗法耐药后保持稳定.
- 虽然很少见,可塑性存在,特别是在NEUROD1占主导地位的SCLC中,可能转化为ASCL1占主导地位.
- 对于新型向性药物,通常不需要重新分型,除了需要仔细考虑的NEUROD1占主导地位的病例.
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