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在MSI结直肠癌中抑制ferroptosis和促进CD8⁺T细胞的新作用

Dongsheng Zhang ¹, Sheng Yang ^1,2, Hengjie Xu ^1,2

¹Department of General Surgery, Colorectal Institute of Nanjing Medical University, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.
²The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu, China.
³Department of General Surgery, Colorectal Institute of Nanjing Medical University, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China. wxw0213@njmu.edu.cn.
⁴The First School of Clinical Medicine, Nanjing Medical University, Nanjing, Jiangsu, China. wxw0213@njmu.edu.cn.
⁵Department of General Surgery, Colorectal Institute of Nanjing Medical University, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China. sunyueming@njmu.edu.cn.
⁶Jiangsu Province Engineering Research Center of Colorectal Cancer Precision Medicine and Translational Medicine, Nanjing, Jiangsu, China. sunyueming@njmu.edu.cn.
⁷Collaborative Innovation Center for Cancer Personalized Medicine, Nanjing Medical University, Nanjing, Jiangsu, China. sunyueming@njmu.edu.cn.
⁸The Affiliated Shuyang Hospital of Xuzhou Medical University, Suqian, Jiangsu, China. sunyueming@njmu.edu.cn.

⁰Department of General Surgery, Colorectal Institute of Nanjing Medical University, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu, China.

British Journal of Cancer +

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2025年八月22日

在PubMed上查看摘要

概括

在微卫星不稳定结直肠癌 (MSI CRC) 中,双特异性酸酶4 (DUSP4) 抑制铁亡并增强CD8+ T细胞透. 这一发现为MSI CRC提供了新的治疗策略,通过向DUSP4来提高免疫疗法的有效性.

科学领域

癌症学
免疫学
细胞生物学

背景情况

微卫星不稳定 (MSI) 大肠直肠癌 (CRC) 与微卫星稳定 (MSS) 大肠直肠癌相比具有独特的特征.
在MSICRC的发展中疑似有ferroptosis的作用,但尚未完全理解.

研究的目的

调查铁病影响MSICRC的机制.
在MSI CRC中探索双特异性酸酶4 (DUSP4) 在ferroptosis和CD8+ T细胞透中的调节作用.

主要方法

使用脂质过氧化,马隆迪化,4-基-2-非和细胞内Fe2+检测的铁化评估.
蛋白组分析,细胞因子阵列和流动细胞计量以研究CD8+T细胞透调节.
对DUSP4,转移素受体 (TFRC),c-MYC,循环素依赖性激酶7 (CDK7) 和C-X-C动机化学因子16 (CXCL16) 的表达和相互作用的分析.

主要成果

通过减少脂质过氧化和细胞内Fe2+积累,发现DUSP4可以抑制MSICRC细胞中的铁.
DUSP4下调的TFRC表达,这是通过c-MYC进行转录调节的.
通过DUSP4去化CDK7,促进CXCL16的表达并增加CD8+T细胞的透.
在CRC组织中观察到CD8+T细胞透和DUSP4表达之间的正相关性.

结论

在MSI CRC中,DUSP4作为铁的负调节剂.
DUSP4 作为MSI CRC中CD8+ T细胞透的积极调节剂.
向DUSP4和CDK7可能会提高MSICRC免疫治疗的疗效.

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