鉴定和描述一种新型的原体lysin对抗菌 dysgalactiae
Linan Xu1,2, Xingshuai Li2, Xiangpeng Yang2
1Department of Preventive Veterinary Medicine, College of Veterinary Medicine, Shandong Agricultural University, Tai'an 271018, China.
Molecules (Basel, Switzerland)
|July 27, 2024
概括
一种新型的菌体 lysin,Lys1644,有效地向耐药性Streptococcus dysgalactiae,这是牛乳腺炎的原因. 将Lys1644与抗生素相结合,为对抗这些难以治疗的感染提供了一个有希望的策略.
科学领域:
- 兽医微生物学 兽医微生物学
- 细菌生物学的生物学
- 抗微生物耐药性 抗微生物耐药性
背景情况:
- 甲状腺杆菌 (Streptococcus dysgalactiae) 导致牛乳炎,导致乳制品行业的重大经济损失.
- 在S. dysgalactiae的抗生素耐药性需要新的治疗方法.
- 菌体 lysins 显示对抗药物耐药的格拉姆阳性细菌的潜力,但对S. dysgalactiae prophage lysins的研究是有限的.
研究的目的:
- 从临床S. dysgalactiae分离物中识别和表征一种新型的prophage lysin.
- 为了评估lysin.lytic活性,抗菌谱,以及确定lysin.lytic的最佳条件.
- 评估素与抗生素对抗S. dysgalactiae的协同效应.
主要方法:
- 基因组测序和生物信息学分析,以挖掘原 lysins.
- 新型素的表达和净化,被指定为Lys1644.
- 在实验室中评估的活性,抗菌谱,跨pH和温度范围的稳定性,以及与抗生素的协同作用.
主要成果:
- 一种新型的prophage lysin,Lys1644,被发现并进行了鉴定.
- 1644表现出高的细菌解活性,特别针对S. dysgalactiae,在牛奶中减少了CFU的100倍.
- 1644在广泛的pH (5-10) 和温度 (4-42°C) 范围内保持活力.
- 用Lys1644与胺素或胺素的亚抑制度的联合治疗完全抑制了细菌的生长.
结论:
- 莱斯1644是一种强大的抗杆菌 (Streptococcus dysgalactiae) 解剂.
- 莱斯1644的广泛活性范围和稳定性使其适用于治疗应用.
- 将Lys1644与现有的抗生素结合起来,为克服S. dysgalactiae感染中的耐药性提供了一个可行的策略.
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