限制NAD+代谢增强了多发性骨髓瘤患者高剂量梅尔法兰的疗效
Debora Soncini1, Pamela Becherini2, Francesco Ladisa2,3
1IRCCS Ospedale Policlinico San Martino, Genoa, Italy.
Blood advances
|December 11, 2024
概括
同时准NAMPT和NAPRT酶为治疗多发性骨髓瘤 (MM) 提供了一个有希望的策略. 这种双重抑制克服了对NAD+降低剂的耐药性,提高了MM细胞中化疗的有效性.
科学领域:
- 生物化学 生物化学
- 在瘤学瘤学.
- 代谢途径 代谢途径
背景情况:
- 尼古丁胺酸基转移酶 (NAMPT) 的升高在癌症中很常见,包括多发性骨髓瘤 (MM).
- 之前的NAMPT抑制策略在临床试验中失败,原因是替代的NAD+生产途径.
- 在MM细胞中,NAD+代谢失调,因此需要更深入地了解其生物合成途径.
研究的目的:
- 在多发性骨髓瘤 (MM) 细胞中定义特定的NAD+景观.
- 为了确定替代的NAD+生物合成途径,使其对NAMPT抑制剂产生抗性.
- 评估针对MM的NAMPT和尼古丁酸酸转移酶 (NAPRT) 的治疗潜力.
主要方法:
- 数学建模与转录组数据集成,以分析NAD+代谢.
- 对NAPRT-Knockout (KO) MM细胞进行转录基因,代谢和生物能量分析.
- 评估NAMPT和NAPRT联合抑制对MM细胞对化疗敏感性的影响.
主要成果:
- 普雷斯-汉德勒通路,利用尼古丁酸通过NAPRT,支持MM细胞中的NAD+合成.
- NAPRT对降低NAD+的药物具有抗性,其缺失会削弱MM细胞的抗氧化防御,增加氧化应激.
- 结合NAMPT和NAPRT的抑制使MM细胞对梅尔法兰敏感,NAPRT的再添加完全挽救了这些影响.
结论:
- 通过向NAMPT和NAPRT,全面抑制NAD+生物合成是MM的可行的治疗策略.
- 这种双重向的方法可以克服仅仅通过NAMPT抑制观察到的抗性机制.
- 这些发现支持在对可移植MM患者的临床试验中测试双重NAMPT和NAPRT抑制,特别是那些具有攻击性疾病的MM患者.
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