综合性免疫分析揭示了一种带有"热"瘤免疫微环境的雷性肌肉瘤子集
Xiaolan Feng1, Laurie Tonon2, Haocheng Li3
1Tom Baker Cancer Center, Department of Medical Oncology, University of Calgary, Calgary, AB T2N 4N2, Canada.
Cancers
|July 29, 2023
概括
这项研究使用转录基因剖析识别,确定了一种免疫热性乳腺肌肉瘤 (LMS) 的子集. 这些发现可以改善患者在罕见癌症中选择免疫检查点抑制剂 (ICI).
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 基因组学就是基因组学.
背景情况:
- 乳腺髓肉瘤 (LMS) 是一种罕见的癌症,通常被归类为免疫感冒,导致免疫检查点抑制剂 (ICI) 的反应率较低 (<10%).
- 尽管如此,一些LMS患者对ICI表现出持久的反应,这表明存在免疫反应子集.
- 在某些LMS病例中,三级淋巴体结构 (TLS) 与积极反应有关.
研究的目的:
- 为了研究LMS.的瘤免疫微环境 (TIME) 中的免疫生物标志物.
- 确定可能从ICI中受益的潜在患者子集.
- 探索免疫特征和现有的生物标志物之间的关系.
主要方法:
- 在两个独立的LMS队列 (ICGC,N=146;TCGA,N=75) 的RNA测序数据上使用了全面的转录基因分析和解卷法.
- 使用90基因特征和通过估计RNA转录的相对子集 (CIBERSORT) 来识别细胞类型的应用无监督聚类.
- 与验证的签名相关的已识别的免疫集群:瘤免疫类 (SIC),TLS得分,T细胞炎症签名 (TIS),免疫透得分 (IIS) 和M1/M2巨得分.
主要成果:
- 在两个队列中确定了不同的"免疫热" (I-H, T-H) 和"免疫高" (I-Hi, T-Hi) LMS集群.
- 这些免疫活性集群与验证的免疫特征有显著的关联,包括TLS,TIS,IIS和M1/M2得分.
- 与一些现有的签名相比,应用的聚类方法发现了潜在的免疫热LMS患者的比例较大.
结论:
- 综合性免疫分析揭示了一个具有活跃 ("热") 时间的LMS子集.
- 这种活跃的TIME始终与在其他癌症类型中观察到的验证的免疫特征有关.
- 开发的方法显示了提炼免疫生物标志物的希望,以便在临床试验中更好地选择LMS患者接受ICI治疗.
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