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在MYCN增强神经母细胞瘤中,MTHFD1调节NADPH氧化还原稳态
Jinqiu Guan1,2, Mengzhen Li1,2, Yi Wang1,2
1Department of Pediatric Oncology, Sun Yat-sen University Cancer Center, Guangzhou, China.
Cell death & disease
|February 9, 2024
概括
甲基基酸脱酶1 (MTHFD1) 是MYCN增强神经母细胞瘤 (NB) 中的一种新瘤基因. 准MTHFD1或将甲基和JQ1结合在一起,显示了高风险NB患者的治疗潜力.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生化学
背景情况:
- 在高风险神经母细胞瘤 (NB) 中,MYCN放大是预后不良的因素.
- 了解MYCN放大NB中的分子机制对于新的治疗点至关重要.
研究的目的:
- 在MYCN增强的NB中识别和描述新的治疗点.
- 调查甲基酸酸脱酶1 (MTHFD1) 在NB病变发生中的作用及其作为治疗点的潜力.
主要方法:
- 差异基因表达分析发现MTHFD1在MYCN增强的NB中高度表达.
- 试验室研究涉及MTHFD1敲击,以评估对NB细胞增殖,迁移和亡的影响.
- 在体内小鼠模型被用来验证MTHFD1的瘤发生作用.
- 奇普-qPCR和双露西法酶记者分析阐明了MYCN对MTHFD1的转录调节.
- 在MTHFD1倒置后测量了还氧稳定,包括NADP/NADP+和GSH/GSSG比率,以及活性氧物种 (ROS) 水平.
主要成果:
- MTHFD1表达与MYCN正相关,并预测NB患者的预后不佳.
- MTHFD1倒置抑制了NB细胞的增殖和迁移,在体外诱导了细胞亡,并在体内减少了瘤的生长.
- MYCN直接激活了MTHFD1的转录.
- MTHFD1在MYCN增强的NB中维持NADPH氧化还原平衡;它的淘汰破坏了这种平衡,增加了ROS并触发了亡.
- 与JQ1结合MTHFD1敲击或甲状腺素 (MTX) 结合,在体外和体内都显示出增强的抗瘤效果.
结论:
- MTHFD1 作为 MYCN 增强 NB 中的瘤基因,并代表潜在的治疗点.
- MTX和JQ1的组合具有显著的临床翻译价值,用于治疗MYCN增强的NB.
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