阿拉曼丁/MrgD路径在衰老中调节肠-骨髓轴
bioRxiv : the preprint server for biology
|February 23, 2026
概括
阿拉曼丁 (Ala) 通过恢复结肠上皮质屏障的完整性和调节肠-骨髓轴,逆转与衰老相关的漏肠. 这种新型的氨酸-血管酶系统成员改善了微生物组的平衡,并减少了炎症.
科学领域:
- 衰老的研究研究.
- 胃肠病学 胃肠病学
- 免疫学 免疫学 免疫学
背景情况:
- 衰老与结肠上皮屏障完整性受损和骨髓 (BM) 骨髓形成增加有关.
- 阿拉曼丁 (Ala) 和MrgD是氨酸-血管新生素系统 (RAS) 的新组成部分.
- 肠骨髓 (BM) 轴在与衰老相关的生理变化中起着至关重要的作用.
研究的目的:
- 研究阿拉曼丁 (Ala) 是否能恢复老年小鼠结肠上皮屏障的完整性.
- 为了确定阿拉是否调节肠-肌肉轴以达到这些效果.
- 探索阿拉对肠道微生物群和免疫细胞群的影响.
主要方法:
- 老年小鼠 (22-24个月) 和年轻小鼠 (2-3个月) 用盐水或阿拉治疗.
- 用FITC-dextran评估了肠道的透性.
- 分析了结肠上皮干细胞 (ISC),Wnt3a,β-catenin,便微生物组和单细胞巨细胞.
主要成果:
- 在老年小鼠中,ALA治疗逆转了肠道透率的增加.
- 艾拉在老年结肠器官中增加了Wnt3a,-CREB和活性β-catenin水平.
- 阿拉改善了微生物群的多样性,改变了细菌的组成,并调节了老年小鼠的免疫细胞概况.
结论:
- 阿拉曼丁 (Ala) 有效地逆转与衰老相关的"漏肠"表型.
- 阿拉通过调节肠 - 肠道轴和改善微生物群平衡来恢复肠道屏障功能.
- 阿拉作为治疗与年龄相关的胃肠道和免疫功能障碍的治疗剂具有前景.
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