对NF-κB蛋白p65的下调是大多数抗衰老干预措施中共享的表型
Ahmed M Elmansi1,2, Abraham Kassem1, Rafael M Castilla1
1Department of Pathology, University of Michigan School of Medicine, Ann Arbor, MI, USA.
GeroScience
|December 12, 2024
概括
老龄化会增加炎症. 长寿干预可以通过降低核因子-卡帕B (NF-κB) 水平,特别是肝脏中的p65蛋白来减少炎症,这表明了抗衰老疗法的新目标.
科学领域:
- 老年学是一门学科.
- 分子生物学分子生物学
- 免疫学 免疫学 免疫学
背景情况:
- 炎症是老化的标志,无论是在老鼠和人类.
- 转录组研究表明,抗衰老干预措施可以降低促炎蛋白.
- 在长寿干预措施的抗炎作用中NF-κB信号的作用需要进一步研究.
研究的目的:
- 测试长寿干预措施降低NF-κB水平,调解抗炎益处的假设.
- 在各种老化缓慢的小鼠模型中研究NF-κB子单元p65和其他信号调节者的表达.
- 为了确定新的长寿干预措施的潜在分子标.
主要方法:
- 对不同老化缓慢的小鼠模型 (GHRKO,Snell Dwarf,PAPPA KO) 肝脏中NF-κB p65蛋白水平的分析.
- 在接受寿命延长药物治疗的小鼠中评估p65水平 (拉帕米辛,卡纳格利弗洛辛,梅克利辛,阿卡尔,17α-雌激素,阿斯塔克桑) 和热量限制.
- 测量其他NF-κB通路组件 (IKKα,IKKβ,IκB-α),NCoR1和p65目标蛋白 (HNF4α,IL-1β,CRP).
主要成果:
- 在GHRKO和Snell矮鼠 (两性) 和PAPPAKOKO小鼠 (雌性) 的肝脏中,NF-κB p65显著下调.
- 在接受拉帕米辛,卡纳格利弗洛辛,梅克利辛,阿卡尔博斯治疗的小鼠和接受卡路里限制的小鼠中,p65水平降低了.
- 在一些缓慢衰老模型中,NCoR1和p65向基因 (HNF4α,IL-1β,CRP) 也被降低调节,而其他NF-κB调节器显示出不一致的变化.
结论:
- 在多个慢衰老老鼠模型的肝脏中,NF-κB信号传递,特别是p65亚单元,似乎受到抑制.
- 对NCoR1和关键的p65标蛋白的下调进一步支持NF-κB的抑制.
- NF-κB p65代表了旨在促进寿命和减少与年龄相关的炎症的干预措施的潜在治疗标.
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