玛辐射非囊型B组链球菌促进T细胞依赖免疫,并提供交叉保护反应
Yong Zhi1, Fengjia Chen2, Guangxu Cao1
1Department of Obstetrics and Gynecology, Shanghai East Hospital, School of Medicine, Tongji University, Shanghai 200092, China.
Pharmaceuticals (Basel, Switzerland)
|June 1, 2023
概括
玛辐射无活化的B组链球菌 (GBS) 疫苗显示出增强的免疫性和对新生儿败血症和肺炎的保护功效. 这种方法为开发通用GBS疫苗提供了一个有希望的战略.
科学领域:
- 免疫学 免疫学 免疫学
- 微生物学 微生物学
- 疫苗学 疫苗学 疫苗学
背景情况:
- 乙组链球菌 (GBS) 是新生儿败血症和肺炎的主要原因,在成年人中增加了疾病负担.
- 目前的产后抗生素预防 (IAP) 不足以制不断上升的GBS感染率.
- 通过玛辐射使GBS无活化,可以保持抗原性,同时消除复制性,提供潜在的疫苗策略.
研究的目的:
- 为了评估玛辐射无活化GBS (Rad-GBS) 与甲素无活化GBS (Che-GBS) 的免疫性和保护效果.
- 评估Rad-GBS作为针对侵入性GBS感染的通用疫苗候选人的潜力.
主要方法:
- 使用玛辐射 (Rad-GBS) 或甲 (Che-GBS) 灭活了GBS菌株.
- 通过测量免疫细胞反应 (BMDCs,CD4+ T细胞) 和小鼠的抗体产生来评估免疫性.
- 通过对毒性GBS菌株的挑战研究和收养转移实验来确定保护性疗效.
主要成果:
- 与Che-GBS相比,Rad-GBS表现出优越的免疫性,诱导了更高的共刺激分子表达和更强的CD4+T细胞反应 (IFN-γ+,IL-17A+).
- 用Rad-GBS免疫的小鼠显示出对抗GBS挑战的显著保护,由抗体和T细胞介导.
- Rad-GBS诱导了对多种GBS血清型的交叉保护,通过增强的食细胞杀死活性证明了这一点.
结论:
- 玛辐射是一种有效的方法,可以使GBS无活化,同时保留用于疫苗开发的关键抗原表位.
- Rad-GBS引发了强大的细胞和幽默免疫反应,对侵入性GBS疾病提供了显著的保护.
- 无活化全细胞GBS疫苗是开发针对GBS感染的通用疫苗的可行策略.
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