尼古丁胺 N-甲基转移酶抑制改善四肢功能在实验外围动脉疾病的实验
Gengfu Dong1, Jaewon Choi1, Yufen Li1
1Department of Applied Physiology and Kinesiology, The University of Florida, Gainesville, Florida, USA.
Physiological reports
|October 18, 2025
概括
尼古丁胺N-甲基转移酶 (NNMT) 的抑制改善了外周动脉疾病 (PAD) 模型中的骨肌肉强度和性能. 这种方法可以提高四肢功能而不改变输液,为PAD患者提供新的治疗途径.
科学领域:
- 生物医学科学 生物医学科学
- 分子生物学分子生物学
- 血管生物学 血管生物学
背景情况:
- 周围动脉疾病 (PAD) 显著损害四肢输液和骨肌肉功能,治疗恢复肌肉性能的选择有限.
- 尼古丁胺胺氨基二核酸 (NAD+) 代谢在PAD中失调,呈现出潜在的治疗标.
- 尼古丁胺N-甲基转移酶 (NNMT) 将前体从NAD+救援途径转移,并与PAD病理生理学有关.
研究的目的:
- 调查NNMT在PAD诱导的骨肌功能障碍中的作用.
- 为了确定抑制NNMT是否可以在临床前PAD模型中改善缺血四肢功能.
主要方法:
- 在人类PAD骨肌中分析了NAD+通路基因和蛋白质表达.
- 评估了小鼠肌肉干细胞 (MuSCs) 在后肢缺血 (HLI) 后的NNMT表达.
- 在HLI之前和之后用NNMT抑制剂 (NNMTi) 或安慰剂治疗的小鼠,评估四肢 perfusion,肌肉收缩性和组织学.
主要成果:
- 在PAD患者的骨肌肉和HLI后小鼠MuSC中,NNMT表达升高.
- 治疗NNMTi并没有显著改变四肢 perfusion 恢复或毛细血管密度.
- 抑制NNMT显著改善了缺血性肢体的肌肉力量,功率和总体工作.
结论:
- 在PAD和HLI期间,NNMT在骨肌肉中升级调节.
- 在临床前PAD模型中,抑制NNMT可以提高骨肌肉的强度和性能.
- 准NNMT代表了一种有前途的治疗策略,用于改善PAD肌肉功能,而不依赖于 perfusion 改善.
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