年龄对免疫系统的影响比中度外科创伤和麻醉更大
Richard F Kraus1, Isabella Rastorfer2, Sara Sixt2
1Department of Anaesthesiology, University Hospital Regensburg, Franz-Josef-Strauss-Allee 11, 93053, Regensburg, Germany. Richard-Felix.Kraus@klinik.uni-regensburg.de.
Scientific reports
|November 7, 2025
概括
衰老显著影响免疫细胞功能,特别是中性粒细胞 (PMN) 和T细胞,比中度手术更重要. 这项研究揭示了免疫反应与年龄相关的变化,这对于理解免疫发生至关重要.
科学领域:
- 免疫学 免疫学 免疫学
- 老年学是一门学科.
- 细胞生物学 细胞生物学
背景情况:
- 免疫系统的有效性随着年龄的增长而下降,这一过程被称为免疫衰变.
- 衰老会影响中性粒细胞 (PMN) 和T细胞,受主要疾病等辅因子的影响.
- 了解与年龄相关的免疫变化对于管理老年人的健康至关重要.
研究的目的:
- 研究衰老对年轻和老年人免疫系统功能的影响.
- 为了比较手术前和手术后的PMN和T细胞的免疫活性.
- 为了确定年龄或中度外科创伤是否对免疫反应产生更大的影响.
主要方法:
- 从年轻 (18-65岁) 和老年 (>65岁) 患者手术前和后收集全血.
- 用免疫试验,活细胞成像 (LCI) 和流细胞计 (FACS) 来分析隔离的PMN和T细胞.
- 评估PMN特性 (迁移,ROS产量,NET形成,表面表位),粘附分子,细胞活力和实验室化学.
主要成果:
- 老年患者的PMN显示迁移距离增加,每个PMN的TSPO标记线粒体增加,表明更多的自杀性NETosis.
- 老年患者中中性粒细胞与淋巴细胞的比率 (NLR) 和CD4/CD8的比率都较高.
- 术后白细胞症发生在所有患者中,由单细胞和PMN驱动,独立于创伤严重程度;老年患者的IL-6水平较高.
结论:
- 年龄显著影响PMN和T细胞功能,超过了中度外科创伤和麻醉的影响.
- 免疫发生导致免疫细胞行为和比率的明显变化,特别是在老年人中.
- 这些发现提高了对与年龄相关的免疫系统衰退及其对健康的影响的理解.
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