在Staphylococcus lugdunensis分离物中Lugdunin的生产和活性与其基因型有关
Shih-Cheng Chang1,2, Cheng-Yen Kao3, Lee-Chung Lin1
1Department of Laboratory Medicine, Linkou Chang Gung Memorial Hospital , Taoyuan, Taiwan.
Microbiology spectrum
|September 21, 2023
概括
卢格杜宁是一种来自Staphylococcus lugdunensis的抗微生物,对格拉姆阳性细菌具有广泛的活性. 这项研究将lugdunin生产与特定的S. lugdunensis基因型联系起来,揭示了其对抗耐药病原体的潜力.
科学领域:
- 微生物学 微生物学
- 分子生物学分子生物学
- 抗微生物是一种抗菌.
背景情况:
- 卢格杜宁是由Staphylococcus lugdunensis产生的,表现出广泛的抑制作用,对抗格拉姆阳性细菌.
- 卢格杜宁活性,S. lugdunensis基因型 (agr,SCCmec,序列类型) 和患病率之间的关系仍然不完全理解.
研究的目的:
- 调查S. lugdunensis分离物中lugdunin生产的流行情况.
- 为了确定lugdunin活动和特定的S. lugdunensis基因型之间的关联.
- 评估卢格杜宁对各种黄金葡萄球菌菌株的活性,包括菌素中间体黄金杆菌 (VISA).
主要方法:
- 使用矩阵辅助激光吸附脱离电离-飞行时间质谱法识别S. lugdunensis分离物.
- 亚格尔点位测试以表征lugdunin生产和抗菌活性.
- 多部位序列类型化 (MLST),SCCmec和S. lugdunensis分离物的农业基因型化.
- 测试卢格杜宁的活性与不同易受万科胺素的黄金葡萄球菌菌株组.
主要成果:
- 在202个S. lugdunensis菌株中,48个 (23.8%) 是抗氧素 (ORSL) 的,154个 (76.2%) 是对氧素敏感的 (OSSL).
- 在16种ORSL (33.3%) 和35种OSSL (22.7%) 菌株中观察到对S. aureus的抗菌活性.
- 产生卢格杜宁的ORSL菌株主要与ST3-SCCmec V-agr II有关,而OSSL菌株与ST3-agr II和ST1-agr I有关.
- 与其他VSSA序列类型相比,Lugdunin对VISA ST239的活性较弱,ST239 VSSA的抗性较高.
结论:
- 这项研究提供了关于S. lugdunensis中lugdunin生产的第一个流行病学数据,将其与特定的序列类型和SCCmec/agr基因型联系起来.
- 生产卢格杜宁的S. lugdunensis菌株显示出显著的流行率,特别是在ST1,ST2和ST3.3之间.
- 这些发现凸显了卢格杜宁作为对抗VISA和hVISA等耐药病原体的治疗剂的潜力,需要对其监管机制进行进一步调查.
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