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欧盟和拉美国家胃腺癌的免疫分析确定了免疫子组和微生物群影响的全球差异
Tessa S Groen-van Schooten1,2,3, Manuel Cabeza-Segura4, Rui M Ferreira5,6
1Department of Medical Oncology, Amsterdam University Medical Center (UMC) location Vrije Universiteit Amsterdam, Amsterdam, Netherlands.
British journal of cancer
|March 21, 2025
概括
研究了来自欧洲和拉丁美洲的胃癌 (GC) 患者. 在一些GC中发现了一种T细胞炎症的微环境,可能受益于免疫疗法,而另一些则表现出与H. pylori感染相关的免疫耐受性.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 微生物组研究的研究.
背景情况:
- 来自欧洲 (欧盟) 和拉丁美洲 (拉美) 国家的胃癌 (GC) 患者在大型多瘤研究中代表性不足.
- 这项LEGACY研究旨在描述这些群体中GC的分子和免疫特征.
研究的目的:
- 分析欧盟和拉美国家胃癌的分子和免疫特征.
- 从这些地区在GC中确定临床相关的子组和免疫微环境.
主要方法:
- 分析了151名GC患者 (95名欧盟,56名拉美地区) 的瘤活检.
- 方法包括免疫组织化学 (CD3,CD8,FOXP3,PD-L1,MSI,HER2),纳米链mRNA表达和微生物组测序.
主要成果:
- 确定了四个不同的免疫群:T细胞占主导地位,巨细胞占主导地位,免疫排除,以及与H. pylori感染相关的过多T细胞的群,主要在墨西哥患者中.
- 与H. pylori相关的群显示了增强的细胞因子信号传递,但缺乏抗原呈现和细胞毒性标志.
结论:
- 来自欧盟和拉美地区的GC可以表现出T细胞炎症的微环境,这表明检查点抑制的潜在益处.
- 与 H. pylori CagA 阳性菌株相关的特定 GC 亚组表现出免疫耐受性,缺乏抗原呈现和细胞毒性,需要进一步调查免疫疗法的有效性.
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