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环境温度和有毒的饮食限制了沙漠动物的蛇毒耐药性
Matthew L Holding1,2, Alexandra Coconis3, Patrice K Connors4,5
1Life Sciences Institute, University of Michigan, Ann Arbor, MI, USA.
Biology letters
|April 15, 2025
概括
温度和饮食等环境因素会影响木鼠毒素的耐药性. 低温和本地饮食降低了抵抗力,增加了蛇咬伤易感性,在这些捕食者-猎物动态.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 毒理学 毒理学 毒理学
背景情况:
- 物种相互作用受到环境变化的影响,例如温度和食物的可用性.
- 蛇毒和哺乳动物毒抗性蛋白质构成了捕食者与猎物的相互作用的分子基础.
- 影响哺乳动物毒素耐药性的非生态因素在很大程度上仍未被描述.
研究的目的:
- 调查环境温度和饮食对沙漠木鼠 (Neotoma lepida) 毒素耐药性的影响.
- 确定环境因素如何调节蛇毒和哺乳动物抗性蛋白之间的分子接口.
主要方法:
- 收集了沙漠木鼠的血清,保持在凉爽或温暖的温度下,并食本地 (木树脂树脂) 或控制饮食.
- 测量了木鼠血清抑制蛇毒金属蛋白酶活性的能力.
主要成果:
- 在较低的环境温度下养的木鼠表现出明显较低的毒药抵抗力.
- 摄入含有酸树脂的木鼠饮食也显示出毒素耐药性降低.
- 这些发现表明,在特定的环境条件下,对蛇咬伤的易感性增加.
结论:
- 温度和饮食的变化可以显著结构掠食者和猎物之间的蛇和木鼠之间的互动结果.
- 环境因素,特别是环境温度,在蛇物种中塑造毒液表型方面可能比饮食发挥更重要的作用.
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