极地地区冰川前陆地中的抗生素耐药性
Jabir Thajudeen1, Siddarthan Venkatachalam1, Puthiya Veettil Vipindas1
1Arctic Ecology and Biogeochemistry Section, National Centre for Polar and Ocean Research, Ministry of Earth Sciences (Govt. of India), Vasco-da-Gama, Goa, India.
融化的极地冰川释放出古老的抗生素耐药性基因 (ARG). 这项研究绘制了冰川前沿地区的ARG地图,发现了与移动遗传元素和环境因素的联系,突出了气候变化风险.
科学领域:
- 环境微生物学环境微生物学
- 基因组学就是基因组学.
- 气候变化科学 气候变化科学
背景情况:
- 抗生素耐药性基因 (ARG) 是一个日益严重的全球健康问题.
- 气候变化,特别是极地冰川和永久土的融化,正在将古代ARG释放到环境中.
- 来自这些来源的ARG的组成,分布和传播尚未得到充分了解.
研究的目的:
- 调查北极和南极冰川前沿地区的ARG的组成和分布.
- 在这些独特的环境中建立ARG的基线数据.
- 了解影响极地地区ARG传播的因素.
主要方法:
- 来自北极和南极冰川前沿地区的43个元基因组的分析.
- 识别和量化ARG和移动遗传元素 (MGE).
- 对ARG,MGE和环境参数 (pH,总有机碳) 之间的相关性分析.
主要成果:
- 确定了154个ARG,其中巴西素,利法素和菌素抗性基因占主导地位.
- 发现ARG和MGEs之间存在显著的相关性,包括20个与"tnpA"MGEs相关的ARG.
- 菌群和虫群是主要的ARG携带菌群;"菌群","假菌群"和"Tatlockia"被确定为关键的ARG携带病原体.
- ARG分布受到pH和总有机碳等环境因素的显著影响.
结论:
- 极地冰川前陆地拥有多种古老的ARG,具有明显的区域差异.
- ARG与MGEs密切相关,这表明横向基因转移的可能性.
- 环境参数在塑造极地地区的ARG景观中起着至关重要的作用.
- 这项研究提供了极地环境中抗菌素耐药性的基本基线数据,强调了与气候变化有关的风险.
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