T细胞受体β变量基因多态性预测检查点封锁免疫疗法期间的免疫相关不良事件
Bettzy Stephen1, Joud Hajjar2, Shrutii Sarda3
1Investigational Cancer Therapeutics, University of Texas MD Anderson Cancer Center, Houston, Texas, USA.
Journal for immunotherapy of cancer
|August 21, 2023
概括
识别T细胞受体β (TCRB) 基因多态可能预测接受免疫治疗的癌症患者的严重免疫相关不良事件 (irAEs). 某些TRBV单元型对这些严重的副作用具有保护作用.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
- 在瘤学瘤学.
背景情况:
- 免疫检查点抑制剂已经改变了癌症治疗,但可以导致严重的免疫相关不良事件 (irAEs).
- 对irAEs的预测生物标志物对于安全的免疫疗法至关重要. 由于它们在自身免疫性疾病中的作用,T细胞受体β (TCRB) 变量 (TRBV) 基因多态是潜在的候选者.
- 之前的研究受到复杂的TCRB位点和不完整的基因组组合的限制.
研究的目的:
- 调查TRBV基因多态化与在接受免疫治疗的癌症患者中发生irrAEs之间的关联.
- 确定特定的TRBV单元类型,可以预测对严重的irAEs的风险或保护.
主要方法:
- 开发了一种新的长安普利康下一代测序方法,用于分析从外周血液总RNA中重新排列的TCRB链.
- 多重PCR被用于放大区域,包括互补性确定区域 (CDRs) 1,2和3,从而能够检测生殖系编码的TRBV多态.
- 在81名患者中构建了TRBV等位基因配置文件,并与irAE注释相关联.
主要成果:
- 通过主要成分分析和k-means集群,确定了六种主要的TRBV单元型.
- 患者队列中的三分之一表现出TRBV等位基因单位型,该等位基因表现出针对严重的IRE (≥3级) 的保护性关联.
结论:
- 长安普利康TCRB谱系测序是一种可行的方法,用于识别与irAE风险相关的TRBV亚型组.
- 在接受癌症免疫治疗的患者中,生殖系编码的TRBV多态表现为严重的irAEs的预测生物标志物.
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