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基因生成受损与COVID-19中的T细胞功能障碍有关
Fotios Karagiannis1, Konrad Peukert2, Laura Surace1,2
1Immunopathology Unit, Institute of Clinical Chemistry and Clinical Pharmacology, Medical Faculty, University Hospital Bonn, University of Bonn, Bonn, Germany.
Nature
|July 28, 2022
概括
基因生成产生β-基酸盐 (BHB),对于肺部感染中T细胞功能至关重要. 在严重的COVID-19中,BHB产量受损会阻碍免疫反应,但BHB补充可以恢复T细胞功能并降低死亡率.
科学领域:
- 免疫学
- 代谢途径
- 呼吸道感染
背景情况:
- 厌食症和禁食会引发生成,产生β-基酸盐 (BHB).
- 在肺部感染期间,生成对调节免疫反应的作用尚不完全理解.
- SARS-CoV-2 和流感感染可能导致急性呼吸困难综合征 (ARDS).
研究的目的:
- 研究生成和BHB对肺病毒感染免疫反应的影响.
- 确定SARS-CoV-2和流感引起的ARDS之间是否存在BHB的产生差异.
- 探索BHB作为严重呼吸道感染的治疗剂的潜力.
主要方法:
- 在SARS-CoV-2引起的ARDS和流感引起的ARDS患者中对BHB产生的比较分析.
- 通过代谢追踪评估BHB对CD4+T细胞存活率,干扰素玛生成和代谢的影响.
- 在体内研究,使用患有严重呼吸道感染的小鼠,接受基饮食和BHB基因饮料治疗.
主要成果:
- 在SARS-CoV-2 ARDS中,BHB的产生受损,但在流感ARDS中却没有.
- BHB 增强了 CD4+ T 细胞的存活率和干扰素的产生.
- BHB促进了T细胞的氧化酸化,支持氨基酸和谷氨的产生,并恢复了SARS-CoV-2 ARDS T细胞的功能.
- 基因饮食和BHB补充剂降低了患有严重呼吸道感染的小鼠的死亡率.
结论:
- 在肺病毒感染中,BHB是支持T细胞反应的关键替代碳来源.
- 营养不良和随后的BHB缺乏可能是COVID-19严重性的重要因素.
- 在严重的呼吸道病毒感染中,BHB补充剂具有治疗潜力.
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