BCG疫苗接种对端粒长度和端粒酶活性的长期影响
Ozlem Bulut1, Valerie A C M Koeken1, Simone J C F M Moorlag1
1Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, the Netherlands.
iScience
|August 13, 2025
概括
细菌卡尔梅特-盖林 (BCG) 疫苗接种缩短免疫细胞中的端粒,特别是在男性中. 这种效应可能与水平和训练有素的免疫力有关,这表明性别特异性对衰老过程的影响.
科学领域:
- 免疫学 免疫学 免疫学
- 衰老研究研究 衰老研究
- 遗传学 遗传学 是一个
背景情况:
- 众所周知,Bacillus Calmette-Guérin (BCG) 疫苗可以减少炎症并诱导训练免疫力.
- BCG接种疫苗对免疫细胞衰老的特征,如端粒长度的影响,仍然在很大程度上未被探索.
- 端粒维护是细胞衰老和免疫系统功能的关键因素.
研究的目的:
- 研究BCG疫苗接种对人类免疫细胞中端粒长度的影响.
- 为了确定BCG疫苗是否会影响与衰老相关的过程中的端粒维护.
- 探索BCG对端粒动态影响的潜在性别特异性差异.
主要方法:
- 在BCG疫苗接种前和BCG疫苗接种后三个月的两个独立的人类队伍中分析端粒长度.
- 在BCG疫苗接种组和安慰剂组之间比较端粒长度变化.
- 测定端粒长度,训练免疫反应,性别和水平之间的相关性.
- 在体外实验中检查BCG对免疫细胞中端粒酶活性的影响.
主要成果:
- 在BCG接种疫苗后三个月观察到一致的端粒缩短,但在安慰剂后没有.
- 训练有素免疫不响应者中,特别是男性中,端粒损失更为明显.
- 在男性中,高于疫苗接种前的丸激素水平与较大的端粒缩短有关.
- 在体外,BCG激活了端粒酶,在女性中具有更显著的效果,部分受到丸激素的抑制.
结论:
- 接种BCG疫苗会诱导免疫细胞中的端粒缩短,这表明对与衰老相关的过程有影响.
- BCG对端粒动态的影响是性别特异的,受丸激素水平和训练免疫力的影响.
- 这些发现有助于理解BCG疫苗接种的更广泛的免疫和衰老相关后果.
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