在非恶性树突细胞和急性髓性白血病细胞中,d-2-hydroxyglutarate支持一种具有降低主要基因相容性II类表达的宽容性表型
Kathrin Hammon1, Kathrin Renner2, Michael Althammer3
1Department of Internal Medicine III, University Hospital Regensburg; Regensburg, Germany; LIT - Leibniz Institute for Immunotherapy; Regensburg.
Haematologica
|January 18, 2024
概括
D-2-基酸盐 (D-2-HG) 损害了人类树突细胞分化,并促进了急性髓性白血病 (AML) 的免疫抑制. 将维生素C与葡萄糖抑制剂结合起来,可能为AML提供一种新的治疗策略.
科学领域:
- 免疫学 免疫学 免疫学
- 代谢途径 代谢途径
- 癌症生物学 癌症生物学
背景情况:
- D-2-基酸盐 (D-2-HG) 是一种在IDH突变性急性髓性白血病 (AML) 中积累的代代谢物.
- 众所周知,D-2-HG抑制T细胞免疫力,但它对髓状细胞的影响不太清楚.
研究的目的:
- 研究D-2-HG对树突细胞分化和功能的影响.
- 探索D-2-HG对AML细胞的影响,并确定潜在的治疗策略.
主要方法:
- 在D-2-HG的存在下评估人类和小鼠树突细胞的分化.
- 分析主要组织相容性复合体 (MHC) II类和HLA-DP表达在树突细胞和AML突变细胞上.
- 研究D-2-HG诱导的代谢重编程,包括DNA脱甲基化和乳酸盐生产.
- 评估维生素C,甘油抑制剂和表观遗传调节剂的治疗潜力.
主要成果:
- D-2-HG 损害了人类树突细胞分化,导致具有减少MHCII类表达的宽容性表现型.
- IDH突变的AML爆发显示HLA-DP表达减少,T细胞溶解的敏感性降低.
- D-2-HG诱导了新陈代谢重编程,以增加树突细胞中的乳酸盐生产和AML.
- 维生素C增强了DNA脱甲基化,而其与糖溶性抑制的结合恢复了MHCII类表达.
结论:
- 在AML中,D-2-HG具有双重作用,抑制抗瘤免疫力和促进免疫抑制的微环境.
- 在AML中,D-2-HG,乳酸生产和免疫抑制之间存在相互作用.
- 涉及抗糖解剂和表观遗传调节剂的组合疗法代表了AML的有希望的治疗途径.
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