氧化应激和线粒体功能障碍有助于老老鼠的术后认知功能障碍,依赖于NLRP3激活
Sandra Bonfante1, Martins Back Netto2, Aloir Neri de Oliveira Junior2
1Laboratory of Experimental Neurology, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina, Criciuma, SC, Brazil.
Metabolic brain disease
|November 13, 2024
概括
含有3 (NLRP3) 炎症酶的NLR家族皮林域通过在老老鼠的骨科手术后加剧氧化应激和线粒体功能障碍,导致术后认知功能障碍 (POCD).
科学领域:
- 神经科学是一个神经科学.
- 免疫学 免疫学 免疫学
- 老年学是一门学科.
背景情况:
- 手术后认知功能障碍 (POCD) 是一种严重的并发症,特别是在接受手术的老年患者中.
- 连接手术,免疫反应和大脑功能障碍的精确机制仍在调查中.
- 含有3 (NLRP3) 炎症酶的NLR家族皮林域与神经炎症有关,并被认为是POCD的关键参与者.
研究的目的:
- 调查NLRP3炎症酶激活在氧化应激和线粒体功能障碍中所起的作用,从而导致老老鼠的POCD.
- 评估MCC950的治疗潜力,一个选择性的NLRP3抑制剂,在骨科手术的老鼠模型中.
主要方法:
- 成年和老年雄性Wistar大鼠接受了一种实验性骨骨折 (TF) 模型.
- 大鼠接受了盐水或MCC950,NLRP3抑制剂的脑内静脉注射.
- 评估了认知功能,存活率,NLRP3水平,细胞因子概况,氧化应激标志物和线粒体酶活动.
主要成果:
- 在这两年龄组中,TF诱导增加了前额叶皮和海马体的NLRP3水平,老老鼠的水平更高.
- 在老老鼠中,MCC950的使用逆转了认知衰退,使IL-1β和IL-10水平正常化,并降低了氧化应激标志物.
- 在老老鼠中,MCC950治疗恢复了线粒体复合物I,II,IV和酸脱酶活动.
结论:
- NLRP3炎症酶激活是线粒体功能障碍和氧化应激在骨科手术后POCD发展中的关键调解者.
- 用像MCC950这样的抑制剂向NLRP3显示出减轻老年人群中POCD的希望.
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