在废水细菌社区中,非抗生素药物对抗菌素耐药性的抗菌作用和选择
April Hayes1, Lihong Zhang1, Edward Feil2
1Faculty of Health and Life Sciences, University of Exeter, Penryn, UK.
Environment international
|April 29, 2025
概括
非抗生素药物 (NAD) 如二甲和甲福明可以影响细菌群落,并共同选择耐金属基因,即使在低环境度下也是如此. 这项研究突出了微生物生态系统因常见污染物的潜在风险.
科学领域:
- 环境微生物学环境微生物学
- 抗微生物耐药性 抗微生物耐药性
- 生态毒理学 生态毒理学
背景情况:
- 抗菌素耐药性 (AMR) 构成全球健康威胁,由各种环境污染物的共同选择加剧.
- 非抗生素药物 (NAD) 正在成为AMR的潜在共同选择者,但它们在环境相关度下对复杂微生物群落的影响尚不清楚.
研究的目的:
- 在复杂的细菌群体上研究常见的环境NADs (迪克洛菲纳克,甲胺,17-β-雌二醇) 的抗菌作用和AMR共同选择潜力.
- 评估各种度的这些影响,包括在环境中发现的度.
主要方法:
- 使用了基于培养的方法,整个元基因组测序和元转录组学的组合.
- 暴露一个混合的细菌群落,以不同度的二甲,甲胺,和17-β-雌激醇.
- 量化了抗菌作用,并分析了抗体和社区组成的变化.
主要成果:
- 迪克洛菲纳克,甲胺和17-β-雌激醇在分别50μg/L,26μg/L和24μg/L的度下显著抑制了细菌群体的生长.
- 只有17-β-雌激醇显示了选择抗微生物耐药性标记物的证据.
- 通过转基因组学没有观察到抗生素耐药性基因的明确选择,但在暴露于NAD后,发现金属耐药性基因 (例如arsB) 的增加.
结论:
- 环境相关的NAD度可以影响细菌社区的生长和功能.
- NADs可能会影响微生物群落内的特定金属耐药基因的选择.
- 需要进一步的研究才能充分理解NADs,微生物群落和抗菌素耐药性传播之间的复杂相互作用.
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