通过亲吻昆虫在食用转换到血液养过程中毒物吸收和适应
Christina N Zdenek1, Fernanda C Cardoso2,3, Samuel D Robinson2
1Australian Reptile Academy, Whiterock, QLD 4306, Australia.
iScience
|September 16, 2024
概括
刺客虫毒从掠食性祖先进化了抗凝固特性,帮助人们转向食血. 随后的适应减少了有害毒素,同时增强了抗凝血功能,以获得高效的血液食.
科学领域:
- 进化生物学是进化的生物学.
- 毒理学 毒理学 毒理学
- 昆虫生理学 昆虫生理学
背景情况:
- 吻虫 (三胺) 具有抗凝血唾液,对血液养至关重要.
- 这种抗凝唾液的进化起源及其祖先的功能仍然不清楚.
- 研究掠食者祖先的毒素是理解这种食量转移的关键.
研究的目的:
- 为了确定吻虫中抗凝血剂毒的进化轨迹.
- 为了评估捕食杀手虫中毒物的祖先功能.
- 阐明使从捕食转向血的适应性.
主要方法:
- 对掠食虫和食血虫中的毒素成分和活性进行比较分析.
- 生物化学测试以确定负责抗凝效应的关键毒素.
- 毒素的蛋白质分解活性,疼痛诱导和膜透性评估.
主要成果:
- 捕食杀虫虫的毒液通过纤维蛋白分解和富含二硫化物具有强大的抗凝作用.
- 捕食者毒素还具有诱导疼痛和膜透活动,这种活动在食血物种中不存在.
- 从祖先的掠食者毒中提取了血液养的抗凝固特性.
结论:
- 祖先毒液的抗凝功能被选择为血液养的进化.
- 适应涉及降低有害毒素的调节 (蛋白质,细胞,诱导疼痛).
- 特定抗凝固毒素的新功能化和上调促进了高效的血.
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