在多发性骨髓瘤中,S-adenosylmethionine生物合成是一种可向的代谢脆弱性
Yanmeng Wang1, Catharina Muylaert1, Arne Wyns1
1Department of Hematology and Immunology-Myeloma Center Brussels, Vrije Universiteit Brussel - Jette.
Haematologica
|July 20, 2023
概括
甲氨基基转移酶2α (MAT2A) 在多发性骨髓瘤 (MM) 中过度表达,并驱动癌症生长. 抑制MAT2A减少了MM细胞的增殖,并提高了博特佐米布治疗的疗效,提供了一个新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 多发性骨髓瘤 (MM) 是一种不治愈的血液性恶性瘤,具有耐药性的特征.
- 氨基氨基转移酶2α (MAT2A) 是S-氨基氨基 (SAM) 合成中的关键酶,在固体癌症中受到放松,但其在MM中的作用尚不清楚.
研究的目的:
- 研究MAT2A在MM中的作用和分子机制.
- 探索MAT2A作为克服MM药物耐药性的治疗标.
主要方法:
- 对MM患者的基因表达特征分析数据的分析.
- 在MM细胞系中抑制MAT2A,评估细胞效应 (活力,增殖,细胞亡).
- 使用小鼠模型的体内研究和对MAT2A抑制剂 (FIDAS-5) 的评估.
主要成果:
- 在患者衍生的骨髓瘤细胞中,MAT2A表达升高,与预后不佳相关.
- 抑制MAT2A降低了细胞内SAM,损害了细胞活力,减少了增殖,并诱导了亡.
- 抑制MAT2A会使mTOR-4EBP1通路失活,从而降低蛋白质合成和体内瘤负担.
- 抑制MAT2A可以协同增强博尔特佐米布的抗MM作用.
结论:
- MAT2A抑制通过准mTOR介导的蛋白质合成来抑制MM的进展.
- MAT2A抑制剂FIDAS-5显示了MM的治疗潜力.
- 抑制MAT2A可能会改善基于博雷佐米布的MM治疗策略.
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