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一种无蛋白质疫苗可以刺激天生的免疫力,并保护人免受病房病原体的侵害
Jun Yan1, Travis B Nielsen1,2, Peggy Lu1
1Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA.
Science translational medicine
|October 4, 2023
概括
一种新型无蛋白质疫苗显示出对抗耐药细菌和导致医疗相关感染的真菌的前景. 这种创新的疫苗通过刺激先天免疫系统来提高生存率,提供了预防感染的新策略.
科学领域:
- 免疫学 免疫学 免疫学
- 传染性疾病 传染性疾病
- 疫苗开发 疫苗开发
背景情况:
- 医疗相关感染 (HAI) 是由于多种多样的抗微生物耐药性病原体而造成的重大威胁.
- 传统的疫苗往往对这些具有挑战性的医院细菌和真菌无效.
研究的目的:
- 开发和评估一种新型无蛋白质疫苗,用于预防由多抗药生物体引起的感染.
- 评估疫苗对常见的HAI的疗效和作用机制.
主要方法:
- 开发了一种无蛋白质的疫苗配方,含有氧化,单酸脂A和真菌曼南.
- 在小鼠模型中测试了由耐药细菌 (例如MRSA,VRE,ESBL-E. coli,CRAB,CRKP,CRPA) 和真菌 (R. delemar,C. albicans) 引起的侵入性感染的有效性.
- 通过评估淋巴细胞缺乏和巨细胞枯竭的小鼠的疫苗疗效,以及巨细胞的表观遗传分析,分析了免疫反应.
主要成果:
- 该疫苗显著改善了对抗菌素耐药性病原体的感染范围的小鼠的生存率和减少了细菌负担.
- 观察到对细菌和真菌感染的保护,具有快速发病 (24小时) 和持续有效性长达28天.
- 疫苗的有效性依赖于天生的免疫刺激,特别是通过巨细胞,这是表观遗传改变调节细胞和炎症的证据.
结论:
- 这种无蛋白质疫苗代表了一种有希望的新策略,用于预防由抗微生物耐药病原体引起的严重感染.
- 疫苗的机制涉及天生的免疫激活,与传统疫苗相比,提供了一种独特的方法.
- 进一步的发展可能会导致对致命的HOI进行有效的干预.
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