通过与铁调节系统相互作用的新化学物质调节铁代谢
Yoshiaki Tsuji1, Jun Ninomiya-Tsuji1, Maurice Y F Shen2
1Department of Biological Sciences, Toxicology Program, North Carolina State University, Campus Box 7633, Raleigh, NC, 27695-7633, USA.
Redox biology
|December 14, 2024
概括
确定了针对铁调节蛋白2 (IRP2) 的新化学探针,抑制铁代谢,并通过限制铁的可用性来治疗铁过载疾病和癌症的潜力.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 药用化学 医学化学
背景情况:
- 铁代谢对健康和疾病至关重要,但化学相互作用扰乱它的作用尚不清楚.
- 之前已经证明,西斯普拉丁通过阻断与铁反应元素 (IRE) 结合的铁调节蛋白2 (IRP2) 来抑制铁调节系统.
研究的目的:
- 开发新的化学探针来调节IRP-IRE监管系统.
- 为潜在的治疗应用确定IRP2-IRE相互作用的新抑制剂.
主要方法:
- 利用基于人工智能 (AI) 的连接体设计,并选了含氨酸反应弹头的化学库.
- 使用野生类型和突变的IRE-luciferase记者细胞来识别和验证IRP-IRE抑制剂.
- 研究了作用机制,包括对铁含量,基因表达,活性氧物种 (ROS) 和细胞毒性的影响.
主要成果:
- 确定了V004-0872 (乙胺) 作为一种新的IRP-IRE抑制剂,而V011-6261 (甲胺) 缺乏活性.
- V004-0872通过Cys512抑制了人类的IRP2,导致TfR1的下调和费里丁的上调,从而降低了细胞铁水平.
- V004-0872诱导了线粒体ROS和细胞毒性,这种ROS对N-乙囊敏感,但对铁素-1不敏感.
- 发现氨酸蛋白酶抑制剂和乙胺除草剂也可以抑制IRP-IRE系统.
结论:
- 新的化学探针,如V004-0872,通过准IRP2.2,有效地抑制了IRP-IRE系统.
- 这些发现为开发试剂提供了基础,以管理铁的可用性和氧化应激在铁过载条件和癌症.
- 该研究强调了将IRP2作为治疗干预的潜在目标,以治疗铁失调为特征的疾病.
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