Gastric Cancer: L1甲基化与肿瘤浸润淋巴细胞的组合可作为晚期胃癌的预后指标

2019-12-16 不详 MedSci原创

已知高密度的肿瘤浸润淋巴细胞(TIL)与生存时间延长有关,而肿瘤L1亚甲基化与胃癌(GC)患者的生存时间缩短有关。由于淋巴细胞中L1甲基化水平较高,因此更高的TIL密度可能导致在包含癌细胞以及非肿瘤细胞(包括TIL)的癌组织中测量L1甲基化水平。因此,本项研究旨在探索肿瘤L1甲基化水平和TIL密度的组合是否可以作为GC中的预后指标。

背景
已知高密度的肿瘤浸润淋巴细胞(TIL)与生存时间延长有关,而肿瘤L1亚甲基化与癌(GC)患者的生存时间缩短有关。由于淋巴细胞中L1甲基化水平较高,因此更高的TIL密度可能导致在包含癌细胞以及非肿瘤细胞(包括TIL)的癌组织中测量L1甲基化水平。因此,本项研究旨在探索肿瘤L1甲基化水平和TIL密度的组合是否可以作为GC中的预后指标。

方法
研究人员分别使用CD3免疫组织化学和焦磷酸测序进行甲基化分析,对高级GC样品(n = 491)中的TIL和肿瘤L1甲基化水平进行了测量。在肿瘤中心和浸润性前沿区域测量TIL密度。

结果
结果显示TIL密度与肿瘤L1-甲基化水平相关,但该关系较弱。并发现L1甲基化水平和CD3 TIL密度的组合状态在生存分析中具有统计学意义。多变量分析表明,组合状态和生存之间的关系是独立的。

结论
本项研究发现肿瘤L1甲基化水平与TIL密度相关,该组合可能有助于在L1甲基化状态低的GC中找到临床效果较差的GC患者。

原始出处:

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    2020-02-27 skhzy
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    2020-04-18 许安
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