开发用于沙门氏菌疫苗接种的毒素-抗毒素自我破坏性细菌
Nady Gruzdev1, Jacob Pitcovski2, Chen Katz1
1MIGAL Research Institute in the Galilee, Kiryat Shmona, Israel.
Vaccine
|July 3, 2023
概括
这项研究开发了用于疫苗的自我毁灭的沙门氏菌. 这种新的方法将活体减弱的有效性与非活化疫苗的安全性相结合,为预防食品传播的沙门氏菌感染提供了一个有希望的平台.
科学领域:
- 兽医微生物学 兽医微生物学
- 疫苗开发 疫苗开发
- 细菌病原体的产生
背景情况:
- 禽类产品是人类食源性沙门氏菌感染的主要来源.
- 目前用于农场动物的非活化和活衰减疫苗存在局限性.
- 需要新的疫苗接种策略来提高对沙门氏菌的安全性和有效性.
研究的目的:
- 通过使用毒素-抗毒素 (TA) 系统来设计可诱导的自我破坏的沙门氏菌.
- 评估这些工程细菌作为疫苗平台的体外和体内疗效.
- 将非活化疫苗的安全性与活体减弱疫苗的有效性相结合.
主要方法:
- 用可诱导的毒素-抗毒素 (TA) 系统构建沙门氏菌菌株 (Hok-Sok,CeaB-CeiB).
- 诱导系统的集成由阿拉比诺斯,无氧条件或金属二触发.
- 在生长介质和巨细胞中杀死细菌的体外评估.
- 在口服后对的细菌清除和免疫反应进行体内评估.
主要成果:
- 在特定的诱导条件下,四种工程结构证明了在体外和巨细胞内有效杀死细菌.
- 在的接种后9天内,在克洛亚克拭子中观察到转化细菌的完全清除.
- 到第10天,大多数的脏和肝脏中没有检测到细菌.
- 诱导了抗体免疫反应,与与野生型沙门氏菌相比较.
结论:
- 工程自毁的沙门氏菌 (Salmonella Enteritidis) 在试验室和接种中有效消除了毒性细菌.
- 该系统在足够的时间内促进细菌自我毁灭,以诱导保护性免疫反应.
- 这种可诱导的自我毁灭细菌系统为沙门氏菌和其他病原体提供了安全有效的活体疫苗平台.
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