实体CRISPR瘤发生和多原子分析揭示了MPNST中酸通路中断的脆弱性
Gavin R McGivney1,2,3, Qierra R Brockman1,2,4, Nicholas Borcherding5
1Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, IA 52240, USA.
带有CDKN2A损失的恶性外周神经膜瘤 (MPNSTs) 依赖酸通路 (PPP) 进行生长. 向葡萄糖-6-酸脱酶 (G6PD) 或NRF2显示出治疗这些侵袭性癌症的前景.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 癌症新陈代谢 癌症新陈代谢
背景情况:
- 恶性外围神经膜瘤 (MPNSTs) 是具有不良预后的侵袭性瘤.
- 在MPNST发育中的关键遗传事件包括神经纤维素1 (NF1) 干扰,随后是CDKN2A或P53.5的损失.
- 这些瘤往往耐化疗,需要新的治疗策略.
研究的目的:
- 为了识别具有CDKN2A损失与P53损失的MPNST的明显的转录和代谢特征.
- 发现MPNST的可针对性漏洞,特别是那些具有NF1和CDKN2A改变的漏洞.
- 调查酸通路 (PPP) 和相关因素在MPNST病变发生过程中的作用.
主要方法:
- 在小鼠的CRISPR-Cas9体质瘤发生,用于MPNST建模.
- 多原子分析 (转录组学和代谢组学) 用于比较CDKN2A删除和P53删除的MPNST.
- 在体内和体外实验,涉及关键代谢酶和转录因子 (G6PD,NRF2) 的基因操纵.
主要成果:
- 被CDKN2A删除的MPNSTs对酸通路 (PPP) 和NADPH代谢有很强的依赖.
- 破坏PPP的速率限制酶葡萄糖-6-酸盐脱酶 (G6PD),抑制CDKN2A删除的MPNST生长,并增强化学敏感性.
- Knockdown 的NRF2,一个氧化还原调节的转录因子,降低了MPNST生长和G6PD表达,NRF2的签名与瘤转化和患者存活相关,在MPNST和瘤TCGA数据中.
结论:
- 由NRF2驱动的PPP依赖性代表了MPNST的可针对性漏洞,特别是在常见的NF1/CDKN2A删除子类型中.
- 准G6PD或NRF2可能为这些具有挑战性的恶性瘤提供一种新的治疗方法.
- 了解MPNST中的代谢变化为开发更有效的治疗提供了基础.
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