抗菌蛋白LECT2-b 通过选择性向某些致病细菌,有助于维持肠道微生物群的恒温
Ya-Zhen Hu1, Chang-Song Wu1, Jie Wang1
1National Key Laboratory of Agricultural Microbiology, Hubei Hongshan Laboratory, Engineering Research Center of Green Development for Conventional Aquatic Biological Industry in the Yangtze River Economic Belt, Ministry of Education, College of Fisheries, Huazhong Agricultural University, Wuhan, China.
Journal of immunology (Baltimore, Md. : 1950)
|December 1, 2023
概括
抗微生物的白细胞衍生化学毒素-2 (LECT2)-b通过调节肠道细菌来维持草的肠道健康. 缺乏LECT2-b会破坏微生物的平衡,促进炎症和病原体的生长.
科学领域:
- 水生动物的健康状况.
- 微生物学 微生物学
- 免疫学 免疫学 免疫学
背景情况:
- 抗微生物 (AMP) 对于动物对病原体的肠道免疫是至关重要的.
- AMPs与肠道微生物群之间的确切相互作用尚未完全理解.
- 草是全球主要的养殖鱼类,肠道健康至关重要.
研究的目的:
- 调查白细胞衍生化学素-2 (LECT2) -b在保持草鱼的肠道平衡中的作用.
- 阐明LECT2-b如何直接影响肠道微生物群的组成和功能.
- 评估LECT2-b对肠道炎症和粘膜健康的影响.
主要方法:
- 在草鱼中对LECT2-b的基因敲除,以观察对肠道微生物群的影响.
- 16S rRNA基因测序以分析微生物社区结构.
- 评估细菌属的主导地位,包括致病性和益生菌物种.
- 对生物膜形成和组织炎症标志物的评估.
- 用LECT2-b治疗以逆转敲击诱导的影响.
主要成果:
- 抑制LECT2-b导致肠道微生物群的失调,蛋白质细菌的增加和固体细菌的减少.
- 机会性病原体Aeromonas成为主导,取代了有益的乳杆菌和细菌物种.
- 选择性抑制病原细菌的LECT2-b,其缺乏促进了生物膜的形成.
- 通过LECT2-b治疗缓解的LECT2-b knockdown诱导肠道组织损伤和炎症.
结论:
- 白细胞衍生的化学毒素-2 (LECT2)-b在保持肠道微生物群的稳定和草的粘膜健康方面发挥着至关重要的作用.
- 通过选择性抑制病原体,LECT2-b直接调节肠道微生物群的组成.
- 这项研究为AMP在动物肠道健康和免疫力中的作用提供了关键的见解.
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