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系统性免疫刺激诱导葡萄糖皮质类药物介导的胸膜内置,随后是反弹性增多症,这在老年接受者中受损
Craig P Collins1, Lam T Khuat1, Gail D Sckisel1
1Department of Dermatology, University of California, Davis, School of Medicine, Sacramento, CA, United States.
Frontiers in immunology
|September 24, 2024
概括
系统性免疫刺激疗法可能会导致 temporary 胸腺缩和减少天真T细胞,随后反弹,但这种恢复在老年小鼠中不存在. 这突出了与癌症治疗和感染免疫反应的年龄相关差异.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 衰老研究研究 衰老研究
背景情况:
- 胸腺对于T细胞发育和天真T细胞生产至关重要.
- 衰老和压力导致胸膜内置,减少天真T细胞产量.
- 免疫刺激性癌症疗法对胸腺的影响尚不清楚.
研究的目的:
- 研究系统性免疫刺激方案对小鼠和人类系统中的胸腺和天真T细胞输出的影响.
- 确定葡萄糖皮质类药物在免疫治疗和感染期间调解胸膜内变的作用.
- 评估对免疫刺激的胸膜反应的年龄相关差异.
主要方法:
- 利用小鼠模型和人类患者数据.
- 服用高剂量的IL-2 (HD IL-2) 有或没有抗CD40mAbs和诱导病毒感染.
- 测量了胸膜细胞性,外围T细胞种群,血清葡萄糖皮质水平和T细胞受体切除圈 (TRECs).
- 在小鼠中进行上腺切除术,以评估葡萄糖皮质醇的作用.
- 在年轻,中年和老年老鼠中比较反应.
主要成果:
- 免疫刺激疗法和病毒感染在小鼠中诱导了急性胸膜内置,与高血糖皮质类药物和减少的外周天真T细胞有关.
- 在刺激停止后,在年轻和中年老鼠中观察到过渡性胸膜反弹增大,胸细胞数量增加.
- 接受高发性IL-2治疗的人类患者的皮质醇增加,天真T细胞减少,TRECs减少.
- 经过上腺切除的小鼠被保护免受葡萄糖皮质类药物介导的胸膜内变.
- 晚年老年小鼠表现出进一步的胸膜内置,没有反弹激增,导致长期的天真T细胞缺陷.
结论:
- 系统性免疫刺激疗法和免疫挑战可能会导致过渡性,葡萄糖皮质类药物介导的胸膜内置和减少天真T细胞输出.
- 在年轻的个体中发生了与天真T细胞恢复的胸膜反弹效应,但在老年小鼠中没有这种效应.
- 年龄显著影响着胸腺从免疫刺激诱导的卷积中恢复的能力,在老年人中加剧了天真T细胞缺陷.
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