在老鼠中,IL-17a诱导与年龄相关的嗅觉功能障碍,通过损害再生和促进呼吸道代塑,从而诱导老鼠的嗅觉功能障碍
Shenglei Wang1, Xudong Cha1, Yingqi Xie1
1Department of Otolaryngology, Shanghai Changzheng Hospital, Naval Medical University, Shanghai, PR China.
Nature communications
|December 29, 2025
概括
嗅觉上皮质 (OE) 中的炎症老化会增加介质蛋白-17a (IL-17a),损害嗅觉再生和功能. 用抑制剂向IL-17a可以恢复嗅觉功能,并促进老年小鼠的感觉神经元再生.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
背景情况:
- 嗅觉上皮质 (OE) 持续更新,依靠基底细胞进行恒温和再生.
- 炎症衰老是一种与衰老相关的慢性炎症状态,会影响组织健康,但其在OE再生中的作用尚不清楚.
- 介乐金-17a (IL-17a) 是一种关键的炎症性细胞因子,与各种与年龄有关的疾病有关.
研究的目的:
- 研究IL-17a在与年龄相关的嗅觉上皮层 (OE) 再生和嗅觉功能中的作用.
- 探索针对IL-17a的治疗潜力,以打击与衰老相关的嗅觉功能障碍.
主要方法:
- 利用小鼠模型研究老化条件下的OE再生和嗅觉功能.
- 使用药理剂和中和抗体评估IL-17a抑制的影响.
- 使用与OE有机体和Th17细胞共同培养系统来模拟细胞相互作用.
- 在T细胞中生成IL-17a的条件淘汰小鼠,以评估其特定作用.
主要成果:
- 在老年OE中,炎症衰老促进免疫细胞的招募和激活,在水平基底细胞 (HBC) 和T细胞之间交叉.
- 在老年OE中IL-17a表达升高与嗅觉功能受损相关,并触发炎症信号.
- 抑制IL-17a (Y-320或抗体) 促进了感觉神经元的再生,并逆转了老年OE中的代谢.
- Th17细胞共同培养损害了OE神经发生和促进呼吸细胞转化;IL-17a中和减轻了这些影响.
- 在T细胞中条件淘汰IL-17a通过促进HBC招募和分化,增强了OE再生.
结论:
- IL-17a在与年龄相关的嗅觉上皮质 (OE) 再生缺陷和嗅觉功能障碍中发挥着关键作用.
- 向IL-17a为与年龄相关的嗅觉衰退 (长症) 提供了一个有希望的治疗策略.
- 需要进一步研究IL-17a作为长症的治疗点.
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