营养不良导致感染易感性和失调的骨髓形成,在重新养干预后仍然存在
Alisa Sukhina1,2, Clemence Queriault1, Saptarshi Roy1
1Department of Pathology and Laboratory Medicine, Children's Hospital of Philadelphia, Philadelphia, United States.
eLife
|July 15, 2025
概括
营养不良会损害免疫细胞功能,增加感染风险. 重新养恢复了一些免疫力,但无法完全修复免疫细胞的产生,即使在营养恢复后,也会让个体变得脆弱.
科学领域:
- 免疫学 免疫学 免疫学
- 营养科学 营养科学
- 传染性疾病 传染性疾病
背景情况:
- 营养不良影响全球近10亿人,增加了对传染病的易感性.
- 关联营养不良与免疫功能障碍的确切机制以及再养的有效性仍然不清楚.
研究的目的:
- 研究营养不良如何导致免疫功能障碍.
- 为了确定重新养是否可以逆转营养获得的免疫缺陷.
主要方法:
- 利用小鼠模型的营养不良和随后的再养.
- 评估免疫细胞的功能,扩张和骨髓形成在亚致死性*Listeria monocytogenes*感染后.
- 评估的淋巴细胞器官细胞性和T细胞反应.
主要成果:
- 营养不良的小鼠表现出对*Listeria monocytogenes*感染的控制受损,免疫细胞功能和扩张减少.
- 骨髓形成受到显著影响,显示中性粒细胞和单细胞的缺陷.
- 重新养恢复了体质和淋巴细胞免疫力,但没有对感染的保护性免疫力,因为外围骨髓细胞和紧急骨髓形成仍然受损.
结论:
- 失调的骨髓形成与先前的营养状况与免疫能力有关.
- 粮食稀缺是一个免疫学风险因素,即使在营养恢复后也会产生持久的影响.
- 恢复淋巴细胞恢复不足以完全恢复营养不良后的保护性免疫力.
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