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来自牛奶的细胞外囊泡抑制金黄色葡萄球菌的生长和生物膜的形成
Peng Liu1, Zhaoyuan Wang1, Ziqiang Gao1
1College of Animal Science and Veterinary Medicine, Heilongjiang Bayi Agricultural University, Daqing 163319, China.
Animals : an open access journal from MDPI
|January 10, 2026
概括
牛奶衍生的细胞外囊泡 (mEVs) 对黄金葡萄球菌 (Staphylococcus aureus) 具有抗菌活性,黄金葡萄球菌是牛乳炎的主要病原体. 来自乳腺母乳的MmEV更有效,减少了细菌生长和生物膜的形成,这表明它可能是天然的,没有残留物的治疗方法.
科学领域:
- 兽医微生物学 兽医微生物学
- 细胞外囊泡 细胞外囊泡
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 黄金葡萄球菌是牛乳腺炎的主要原因.
- 抗生素治疗因耐药性和残留问题而面临挑战.
- 来自牛奶的细胞外囊泡 (mEVs) 正在成为天然抗菌剂.
研究的目的:
- 评估来自牛奶的细胞外囊泡 (mEVs) 对黄金葡萄球菌的抗微生物疗效.
- 研究mEVs抗微生物和抗菌膜活动背后的机制.
- 探索mEVs作为牛乳腺炎新型治疗剂的潜力.
主要方法:
- 从健康 (HmEVs) 和乳腺状 (MmEVs) 牛奶中分离和丰富细胞外囊泡.
- 在体外评估mEVs对S. aureus的抗菌活性,包括生长抑制和生物膜破坏.
- 对mEVs的小RNA测序以识别差异表达的miRNA和生物信息学预测它们在S. aureus中的点.
主要成果:
- 无论是HmEV还是MmEV都在体外抑制了黄金色细菌的生长,MmEV表现出更强烈的效应并诱导氧化失衡.
- MmEVs显著降低了S. aureus生物膜生物量,细胞外矩阵生产和关键毒性基因表达.
- 在HmEVs和MmEVs之间观察到不同的miRNA配置文件,MmEVs富含了针对S. aureus生物膜相关基因的miRNA,如clfB.
结论:
- 来自牛奶的细胞外囊泡,特别是来自乳腺牛奶的囊泡,具有显著的抗微生物和抗菌膜特性,可以对抗S. aureus.
- 囊性miRNA被认为是观察到效应的潜在媒介,尽管需要进一步验证.
- mEVs是开发无残留的辅助疗法来治疗牛乳腺炎的一个有希望的途径,需要进一步的体内和机理学研究.
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