在Crotalus molossus复合体中毒的变异和本体遗传变化:对成分,活动和抗毒中和的洞察力
Miguel Borja1, Gamaliel Castañeda-Gaytán1, Alejandro Alagón2
1Facultad de Ciencias Biológicas, Universidad Juárez del Estado de Durango, Av. Universidad s/n. Fracc. Filadelfia, C.P. 35010 Gómez Palacio, Dgo., Mexico.
概括
黑尾蛇 (Crotalus molossus复合体) 的毒素成分因蛇的年龄和物种而异. 这种变化影响了毒药的致命性和墨西哥抗毒药的有效性.
科学领域:
- 类学 类学 类学 类学
- 毒理学 毒理学 毒理学
- 蛋白质组学是指蛋白质组学.
背景情况:
- 墨西哥的Crotalus molossus复合体,包括几个黑尾蛇系,表现出已知的毒液变异.
- 之前的研究还没有全面分析跨物种和本体遗传毒液变异,功能影响或跨这些血统的抗毒药疗效.
研究的目的:
- 在Crotalus molossus复合体的五个谱系中,描述毒素成分,包括毒素的丰富性.
- 研究毒素成分的本体遗传变化及其功能影响 (蛋白解,脂酶A2,纤维蛋白解活性和致死性).
- 评估墨西哥抗毒药 (Antivipmyn®) 对不同毒药变体的中和效果.
主要方法:
- 采用了两种蛋白质学方法来分析来自五个不同的血统的毒液:C. basiliscus,C. m. molossus,C. m. nigrescens,C. m. oaxacus和C. ornatus.
- 评估毒液成分与蛇的长度相关 (本体遗传变异).
- 在小鼠和瓜模型中使用LD50值测量毒液致命性,并评估抗毒素中和.
主要成果:
- 所有五个血统都显示了毒素成分的本体遗传变化,在各个血统中模式有所不同.
- 这些转变导致了酶活性和毒素致命性的显著差异,一些血统中的较小个体对小鼠具有更高的毒性.
- 哺乳动物和爬行动物模型中毒毒的致命性有所不同,而Antivipmyn®对不同的毒池表现出不同的中和作用.
结论:
- 即使在C. molossus复合体内的密切相关的蛇血统中,也存在显著的毒液表型变异.
- 毒素成分的本体遗传变化会影响毒素的功能和致命性.
- 观察到的毒素变异会影响当前抗毒素的疗效,强调需要对区域抗毒素疗效进行进一步研究.
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