氨酸通过细胞膜损伤和氧化应激,转录和表型分析来对抗Streptococcus iniae
Qibin Jiang1, Mingqi Ai1, Songmao Wu1
1College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, Sichuan, 611130, China; Sichuan Aquatic Animal Disease Control and Prevent Center, Chengdu, Sichuan, 611130, China.
Microbial pathogenesis
|October 31, 2025
概括
烯酸有效地通过破坏细胞膜和增加氧化应激来对抗Streptococcus iniae. 这种天然化合物显示出作为水产养殖疾病控制的替代抗生素的前景.
科学领域:
- 微生物学 微生物学
- 水生动物卫生 水生动物卫生
- 药理学 药理学是指药理学的学科.
背景情况:
- 在水产养殖业中,Streptococcus iniae会造成重大经济损失.
- 奥莱阿诺酸是一种来自Swertia mileensis的三烯酸,具有抗菌性质.
研究的目的:
- 研究酸对Streptococcus iniae DY2307.7.的抗菌作用和机制.
- 探索烯酸作为水产养殖中潜在的抗生素替代品.
主要方法:
- 现型实验包括MIC/MBC的确定,ATP的产生,ROS的水平和生物膜的破坏.
- 转录组分析 (RNA-Seq) 来识别差异表达基因 (DEG) 和丰富的途径.
- 进行KEGG通路分析以阐明作用的分子机制.
主要成果:
- 奥莱阿诺酸的最低抑制度 (MIC) 为16μg/mL,最低杀菌度 (MBC) 为32μg/mL,针对S. iniae.
- 观察到的效应包括细胞膜和细胞壁的破坏,ATP的减少,ROS的增加,生物膜抑制和阻碍蛋白质合成.
- 转录组分析显示,关键的代谢途径 (PTS,糖解,TCA,PPP) 的下调和两个组件系统和定数感应等系统的上调.
结论:
- 烯酸主要通过诱导细胞膜损伤和氧化应激来对抗S. iniae.
- 这些发现支持烯酸作为天然抗生素替代品的潜力,用于控制水产养殖中的S. iniae感染.
- 进一步的研究可以建立在这些发现的基础上,开发针对水生病原体的新策略.
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