通过代谢重编程,MerTK诱导功能障碍的树突细胞
Eden Y Zewdie1,2, George M Edwards1, Debra M Hunter1
1UNC Lineberger Comprehensive Cancer Center, Chapel Hill, North Carolina.
Cancer immunology research
|July 8, 2024
概括
向树突细胞 (DC) 中的MerTK可以克服对黑色素瘤抗编程细胞死亡蛋白1 (PD1) 治疗的抗性. 抑制MerTK恢复了DC功能,增强了抗PD1的有效性,并改善了抗瘤免疫反应.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 代谢过程中的代谢.
背景情况:
- 像抗PD1这样的检查点抑制剂对转移性黑色素瘤有效,但面临抗药性.
- 树突细胞 (DCs) 对于免疫反应至关重要,但在瘤中可能变得功能障碍.
- 作为受体氨酸激酶的一种受体,MerTK调解了髓状细胞对死细胞的清除.
研究的目的:
- 研究MerTK在调节瘤微环境中的DC功能和新陈代谢中的作用.
- 为了确定MerTK是否有助于黑色素瘤中抗PD1耐药性.
主要方法:
- 从抗PD1耐药瘤的DC中评估了MerTK水平.
- 在实验室中用缩性黑色素瘤细胞治疗了野生型和MerTK缺乏的DCs.
- 分析了DC代谢 (线粒体呼吸,脂肪酸氧化) 和T细胞刺激能力.
- 在DCs中选择性MerTK切除的小鼠中评估了抗PD1疗效.
主要成果:
- 抗PD1耐药瘤显示MerTK+DCs的增加.
- 异位性黑色素瘤细胞诱导了MerTK表达,改变了新陈代谢,并在野生类型的DC中减少了T细胞刺激.
- 缺乏MerTK的DCs在暴露于死细胞时保持了功能和刺激能力.
- 在DC中MertK消去显著增强了抗PD1疗法的疗效和T细胞透.
结论:
- 在DC中MerTK信号传递促进了代谢功能障碍,并损害了抗瘤免疫力.
- 在DC中准MerTK是克服黑色素瘤中抗PD1耐药性的潜在策略.
- 通过抑制MerTK调节DC代谢可以增强当前的免疫疗法.
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