短时间的微素-LR的口服暴露会破坏小鸟的微生物群恒常性
Serguei V Drovetski1, Valerie I Shearn-Bochsler2, Erik K Hofmeister2
1U.S. Geological Survey, Eastern Ecological Science Center at the Patuxent Research Refuge, Laurel, MD, United States.
Frontiers in toxicology
|October 31, 2025
概括
来自蓝藻细菌繁殖的微囊素-LR (MC-LR) 暴露导致了小麦肠道微生物及其功能的随机,不可预测的变化. 这突出了对鸟类微生物群恒温的随机效应.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 毒理学 毒理学 毒理学
背景情况:
- 蓝藻细菌的繁殖在全球范围内正在增加,原因是肥胖和气候变化.
- 微囊素-LR (MC-LR) 是一种由蓝色细菌产生的流行毒素.
- MC-LR对鸟类微生物组的影响在很大程度上尚未研究.
研究的目的:
- 为了研究微致命的MC-LR暴露对鸟类肠道微生物群的影响.
- 为了比较代谢活跃的 prokaryotes 和它们的功能暴露和控制鱼.
主要方法:
- 在一周的时间里,鱼 (Anas platyrhynchos) 接受了MC-LR的次致命剂量的口服暴露.
- RNA射击枪测序用于分析 prokaryotic 丰富性,组成,毒性因子,抗菌素耐药性基因,代谢途径和蛋白质.
主要成果:
- 暴露组和对照组之间在整体特征的丰富度或组成上没有显著差异.
- 大多数特征,特别是代谢途径的丰富性和/或组成的扩散 (变异性) 在暴露于MC-LR的鸟类中增加.
- 毒性因子或碳水化合物活性酶没有差异表达.
结论:
- 暴露于MC-LR会导致马尔尔德菌群的随机 (随机) 干扰,特别是其功能能力.
- 这一发现与安娜·卡列尼娜原则一致,表明微生物群的恒常性被破坏.
- 这项研究提供了关于鸟类物种微生物群功能的随机干扰的实验证据.
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