丁脱碳酶抑制减轻了与癌症相关的肌肉衰竭
Aneesha Dasgupta1,2,3, Rebecca E Schmitt1,3, Tatsuyoshi Kono4
1Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN, USA.
The Journal of experimental medicine
|July 2, 2025
概括
胰岛素和胰岛素脱氧酶 (HDC) 的活性在癌症缓冲症中升高,导致肌肉衰竭. 用α-甲基胺 (FMH) 抑制HDC有效地逆转了老年小鼠的肌肉损失.
科学领域:
- 生物化学 生物化学
- 在瘤学瘤学.
- 生理学 生理学 生理学
背景情况:
- 癌症缓解症是一种复杂的综合征,其特点是肌肉和脂肪消耗,炎症和代谢功能障碍.
- 胰腺癌的发病率很高 (~80%),特别是在老年患者中.
- 与年龄相关的肌肉消耗是癌症患者的一个重大问题.
研究的目的:
- 通过年龄匹配的小鼠模型,研究组胺在与癌症相关的肌肉衰竭中的作用.
- 在老年癌症患者中确定卡赫克西亚的新型治疗点.
主要方法:
- 利用年龄相匹配的癌症缓冲症的小鼠模型.
- 测量了肌肉组织中的组胺和组胺脱氧酶 (HDC) 活性.
- 给出了外源性组胺和HDC抑制剂 (α-fluoromethylhistidine,FMH).
- 评估了与肌肉缩和信号传递相关的基因表达.
- 测试了氨酸抑制剂的疗效.
主要成果:
- 在老年瘤携带小鼠中,基因组胺和HDC活性特别升高.
- 随着消耗刺激,基因组胺的产生和HDC活动增加.
- 外源性基因组胺诱导的缩相关基因表达.
- 在携带瘤的小鼠中,FMH治疗保护了肌肉缩并挽救了肌肉衰竭.
- 一种氨酸抑制剂逆转了与基因组胺相关的/原信号传递.
结论:
- 组胺和HDC代表了一种新的代谢途径,有助于与癌症相关的肌肉衰竭.
- 抑制HDC提供了潜在的治疗策略,用于癌症患者的缓冲症.
- 向组胺信号可能会减轻肌肉损失,并改善老年癌症患者的治疗结果.
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