蛋白质氨酸甲基化调节抗炎程序,以应对衰老的压力
Yao Yuan1,2, Kaori Motomura1, Jun-Dal Kim1,3,4
1Life Science Center for Survival Dynamics, Tsukuba Advanced Research Alliance (TARA), University of Tsukuba, Ibaraki 305-8575, Japan.
iScience
|August 1, 2025
概括
在人性化小鼠中增强的蛋白质氨酸甲基转移酶1 (PRMT1) 活性减少了与年龄相关的炎症. 这种增强的活动提供了对抗炎症压力的生理优势,这表明了炎症的新策略.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 蛋白质氨酸甲基转移酶1 (PRMT1) 调节细胞功能.
- 由于Prmt1无鼠胚胎死亡率,PRMT1的全身生理作用尚不清楚.
- 人类的PRMT1显示出比小鼠的PRMT1更高的甲基转移酶活性,这是由于单个氨基酸的差异.
研究的目的:
- 在体内研究PRMT1活性增强的生理意义.
- 创建和分析人性化的PRMT1敲入小鼠 (huMice),以模拟提升的PRMT1功能.
- 评估人性化PRMT1对炎症反应和衰老的影响.
主要方法:
- 用H179Y替代产生人性化的PRMT1敲入小鼠 (huMice).
- 转录组分析以识别分子签名.
- 脂聚糖 (LPS) 挑战在老年小鼠中诱导炎症性压力.
- 测量促炎性细胞因子.
主要成果:
- 与野生类型小鼠相比,HuMice表现出明显的转录组特征.
- 在人类小鼠中观察到与年龄相关的炎症反应减弱.
- 在12个月大的人类小鼠LPS后挑战中,显而易见的减少了促炎性细胞因子的产生.
- 增高的PRMT1活性赋予了对与年龄相关的炎症性压力的生理优势.
结论:
- 在生物体水平上调节抗炎程序中,PRMT1起着至关重要的作用.
- 增强的PRMT1活性提供了对与年龄相关的炎症的保护作用.
- 这些发现表明,潜在的治疗策略是针对PRMT1进行炎症治疗.
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