衰老加剧了缺血性中风后的髓氧化酶活动
Negin Jalali Motlagh1,2, Cuihua Wang1,2, Hyung-Hwan Kim3
1Institute for Innovation in Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Charlestown, MA 02114, USA.
Aging and disease
|September 26, 2024
概括
衰老会通过增加大脑中的髓氧化酶 (MPO) 活性而加剧中风损伤. 在老年小鼠中抑制MPO改善了神经结果,这表明中风患者的新治疗点.
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 衰老研究研究 衰老研究
背景情况:
- 氧化应激与衰老和诸如中风等疾病有关.
- 骨髓氧化酶 (MPO) 是一种骨髓酶,产生氧化应激并导致中风损伤.
- 衰老对MPO活动和中风结局的影响仍未得到充分研究.
研究的目的:
- 研究衰老如何影响缺血性中风后的MPO活动.
- 确定MPO在与年龄相关的中风结果中的作用.
- 探索MPO抑制作为老年中风患者潜在的治疗策略.
主要方法:
- 开发和利用MPO可激活光剂 (MAFA) 用于成像.
- 在年轻成年人与老年小鼠中对中风结果,死亡率和神经元损失进行比较.
- 评估MPO活动,Iba1+细胞数和MPO蛋白水平在中风后的不同时间点.
- 评估MPO抑制对老年小鼠神经行为结果和死亡率的影响.
主要成果:
- 与年轻成年小鼠相比,老年小鼠表现出更差的神经结果,更高的死亡率和中风后的神经元损失增加.
- MAFA成像显示,中风后老年大脑中MPO活性显著增加.
- 老年大脑显示Iba1+细胞增加,MPO+细胞的百分比下降,表明MPO释放.
- 在老年小鼠中抑制MPO可以改善神经行为结果并降低死亡率.
结论:
- 衰老显著增加MPO活动,并加剧中风引起的脑损伤.
- 在缺血性中风后,MPO在老年人观察到的不良结果中发挥着关键作用.
- 准MPO活动是一个有希望的治疗途径,可以缓解与年龄相关的中风并发症.
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