在小鼠中,TNFα是衰老相关的肝炎的触发因素
Haktan Övül Bozkir1, Annette Brandt1, Katja Csarmann1
1Department of Nutritional Sciences, Molecular Nutritional Science, University of Vienna, Vienna, Austria.
npj aging
|January 13, 2026
概括
瘤亡因子α (TNFα) 在雄性小鼠的衰老过程中驱动肝炎和纤维化. 消除TNFα通过改善肠道健康和降低内毒素水平来保护肝脏免受损伤.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 衰老研究研究 衰老研究
背景情况:
- 瘤亡因子α (TNFα) 与代谢疾病和与衰老相关的炎症有关.
- 它在与年龄相关的肝炎和纤维化中的特定作用需要进一步阐明.
研究的目的:
- 为了研究TNFα在衰老相关的肝炎,纤维化和男性小鼠相关机制中的作用.
- 为了比较TNFα缺乏对肝脏健康,肠道屏障功能和老年小鼠微生物群组成的影响.
主要方法:
- 在老年雄性小鼠中评估肝炎,衰老标志物 (p16,p21) 和TNFα mRNA.
- 对比年轻和老年TNFα淘汰 (TNFα-/-) 和野生型 (WT) 鼠对肝脏衰老,损伤,肠道屏障完整性和肠道微生物群.
- 使用活体肠道组织模型来检查TNFα对透性和紧结蛋白的影响.
主要成果:
- 老化增加了WT小鼠的肝炎,衰老和TNFα表达.
- 与老年WT小鼠相比,老年TNFα-/-小鼠显示出对肝脏衰老,炎症和纤维化的保护.
- 在TNFα-/-小鼠中的保护与保存的干细胞标记物相关,改善了肠道屏障功能,减少了门内毒素,以及独特的肠道微生物群组成.
结论:
- 在雄性小鼠中,TNFα在促进与年龄相关的肝脏衰退方面发挥着关键作用.
- 向TNFα可能为减轻肝脏衰老提供治疗潜力.
- 部分通过对肠道屏障功能和肠道微生物群的影响,TNFα影响肝脏健康.
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