缺乏Med23会重新编程瘤的微环境,以促进肺部瘤的产生
Xiaobo Fu1, Siming Liu2, Dan Cao3
1State Key Laboratory of Genetic Engineering, School of Life Sciences and Zhongshan Hospital, Fudan University, Shanghai, 200438, China.
British journal of cancer
|January 10, 2024
概括
介质复合体子单元23 (MED23) 负面调节Kras诱导的肺瘤发生. 缺少MED23会加速瘤生长,并促进非小细胞肺癌的免疫逃避.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 肺癌是全球癌症相关死亡的主要原因之一.
- 介质复合体子单元23 (MED23) 与过度活跃的肺癌细胞瘤性有关.
- 在肺瘤发生过程中MED23的体内作用需要进一步研究.
研究的目的:
- 在Kras驱动的非小细胞肺癌 (NSCLC) 中研究MED23的体内功能.
- 探索MED23在肺部瘤发生和免疫反应中的作用的潜在机制.
主要方法:
- 使用KrasG12D驱动的NSCLC小鼠模型.
- 通过H&E和IHC评估瘤进展.
- 评估基因表达的变化,使用西式涂抹和qRT-PCR.
- 分析了具有FACS的免疫细胞种群.
- 通过RNA-seq和记者测定来探索机制.
主要成果:
- 肺上皮层MED23删除显著增加了KrasG12D瘤的数量和大小.
- 缺乏MED23加速了瘤生长,增加了细胞增殖,并增加了ERK酸化.
- 观察到减少CD4+和CD8+T细胞,增加骨髓衍生抑制细胞 (MDSC) 和Treg细胞.
- 免疫反应基因的下调,包括B2m,以及MHC-I复合体在MED23缺陷瘤中的形成.
结论:
- 在体内,MED23负面调节Kras诱导的肺瘤发生.
- 缺少MED23可以通过改变瘤微环境来增强瘤的免疫逃生.
- 这些发现为分类KRAS突变肺癌和开发临床干预提供了洞察力.
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