一个乳酸-SREBP2信号轴驱动宽容性树突细胞成熟,并促进癌症进展
Michael P Plebanek1, Yue Xue1, Y-Van Nguyen1
1Department of Medicine, Division of Medical Oncology, Duke Cancer Institute, Duke University, Durham, NC 27708, USA.
Science immunology
|May 10, 2024
概括
瘤细胞产生调节性树突细胞 (DCs),抑制抗癌免疫力. 在DC中抑制SREBP2通路可以增强抗瘤T细胞的反应,并减缓黑色素瘤的生长.
科学领域:
- 免疫学 免疫学 免疫学
- 癌症生物学 癌症生物学
- 代谢途径 代谢途径
背景情况:
- 传统的树突细胞 (DCs) 对抗瘤免疫非常重要.
- 癌症在瘤微环境 (TME) 中使用机制来损害DC功能.
- 调控性DCs (mregDCs) 和它们在免疫抑制中的作用尚未完全理解.
研究的目的:
- 为了确定瘤抑制DC功能的机制.
- 调查SREBP2和乳酸在DC调节中的作用.
- 探索针对癌症治疗的mregDCs的治疗策略.
主要方法:
- 鉴定CD63作为mregDCs的标记物.
- 对mregDC功能的转录和代谢分析.
- 遗传沉默和药物抑制SREBP2.2. 的药物抑制.
- 在临床前模型和黑色素瘤患者样本中分析mregDCs.
主要成果:
- 由CD63标记的成熟调节性DCs (mregDCs) 抑制DC抗原交叉呈现,并促进T辅助2和调节性T细胞分化.
- mregDC的功能取决于美酸盐路径和SREBP2.
- 黑色素瘤衍生的乳酸激活SREBP2,驱动传统的DC成熟到mregDCs.
- 抑制SREBP2增强了CD8+T细胞的激活,并抑制了黑色素瘤的进展.
- 在临床前模型和黑色素瘤患者的淋巴结中发现了CD63+ mregDCs.
结论:
- 瘤乳酸诱导的SREBP2激活促进CD63+ mregDC的发育和功能.
- 针对SREBP2通路提供了一种潜在的策略,以克服TME中的免疫耐受性.
- CD63+ mregDCs是增强抗瘤免疫力的有希望的治疗标.
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