训练有素的免疫力增强了老年小鼠对宿主感染的抵抗力
Dan Hao1, Katherine R Caja1, Margaret A McBride2
1Department of Anesthesiology, Vanderbilt University Medical Center, 1211 Medical Center Drive, Nashville, TN 37232, United States.
用β-葡萄糖进行免疫训练可以提高老年小鼠对感染的抵抗力,与年轻成年人相匹配. 这种方法可以促进细菌清除和巨细胞功能,为老年人免疫力改善提供希望.
科学领域:
- 免疫学 免疫学 免疫学
- 衰老研究研究 衰老研究
- 传染性疾病 传染性疾病
背景情况:
- 老龄化增加了感染易感性和败血症的严重程度,老年人不成比例地受到影响.
- 天生的免疫训练 (训练免疫) 提供了一种新的策略,以加强老年人群的免疫防御.
研究的目的:
- 在老年小鼠中研究β-葡萄糖诱导的训练免疫的疗效.
- 为了比较它对宿主耐药性和巨细胞功能的影响,与年轻成年小鼠进行比较.
主要方法:
- 老年 (18-20个月) 和年轻 (10-12个月) 的小鼠被用β-葡萄糖治疗以诱导训练的免疫力.
- 评估了宿主对Pseudomonas aeruginosa感染的耐药性.
- 分析了巨细胞代谢能力,抗菌功能 (细胞分裂,呼吸突发) 和基因表达 (RNA-seq).
主要成果:
- 在年轻和老老的小鼠中,β-葡萄糖同样增强了宿主抵抗力.
- 训练有素的免疫力改善了细菌清除,白细胞功能,并减少了细胞因子的产生.
- 两年龄组的巨细胞都表现出增强的代谢和抗菌功能.
- 观察到与炎症和感染反应相关的独特基因表达模式,老年巨细胞显示上调血管生成和伤口愈合途径.
结论:
- 免疫训练在老年小鼠中是有效的,增强了对感染的抵抗力.
- 这一策略有望改善老年人的免疫功能和对抗感染.
- 训练有素的免疫调节了巨细胞中的关键免疫路径,相关的生物过程中存在特定年龄的差异.
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