在MASLD/MASH中,ACMSD抑制可以纠正纤维化,炎症和DNA损伤
Yasmine J Liu1, Masaki Kimura2, Xiaoxu Li1
1Laboratory of Integrative Systems Physiology, Institute of Bioengineering, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland.
Journal of hepatology
|August 24, 2024
概括
抑制ACMSD可以提高肝脏的NAD+水平,通过减少DNA损伤来逆转与代谢功能障碍相关的脂肪性肝病/脂肪性肝炎 (MASLD/MASH). 这为肝脏疾病提供了一个有前途的治疗策略.
科学领域:
- 肝病学和代谢疾病研究.
- 生物化学和酶功能.
- 基因组稳定性和DNA修复机制.
背景情况:
- 在肝脏中,由三开始的 de novo 尼古丁胺胺氨基二核酸 (NAD+) 合成是至关重要的.
- α-氨基-β-碳糖核酸-ε-半甲酸脱碳酶 (ACMSD) 调节了新的NAD+合成.
- 提高NAD+在小鼠模型中显示了代谢益处.
研究的目的:
- 调查ACMSD抑制用于治疗与代谢功能障碍相关的脂肪性肝病/脂肪性肝炎 (MASLD/MASH).
- 探索ACMSD在肝脏NAD+代谢和基因组保护中的作用.
主要方法:
- 使用了MASLD/MASH.的体外模型 (初级肝细胞,肝细胞,肝器官) 和体内小鼠模型.
- 在小鼠疾病发作后治疗性地使用ACMSD抑制剂.
- 在人类肝脏有机体模型中评估了DNA损伤反应.
主要成果:
- 抑制ACMSD促进了新的NAD+合成,并在ex vivo,in vivo和有机体模型中减少了DNA损伤.
- MASLD/MASH小鼠模型显示了被抑制的 de novo NAD+生物合成和与严重程度相关的DNA损伤标志.
- 在小鼠中治疗ACMSD抑制逆转了MASLD/MASH,减轻了纤维化,炎症和DNA损伤.
结论:
- 抑制ACMSD可以提高肝脏的NAD+水平,并提供基因组保护.
- 这种方法证明了MASLD/MASH的治疗潜力.
- ACMSD被确定为MASLD/MASH的有前途的治疗标.
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