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An optimized method for cryogenic storage of Xenopus sperm to maximise the effectiveness of research using genetically altered frogs

机译:一种优化的非洲爪蟾精子低温保存方法可最大程度地利用转基因青蛙进行研究

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摘要

Cryogenic storage of sperm from genetically altered Xenopus improves cost effectiveness and animal welfare associated with their use in research; currently it is routine for X. tropicalis but not reliable for X. laevis. Here we compare directly the three published protocols for Xenopus sperm freeze-thaw and determine whether sperm storage temperature, method of testes maceration and delays in the freezing protocols affect successful fertilisation and embryo development in X. laevis. We conclude that the protocol is robust and that the variability observed in fertilisation rates is due to differences between individuals. We show that the embryos made from the frozen-thawed sperm are normal and that the adults they develop into are reproductively indistinguishable from others in the colony. This opens the way for using cryopreserved sperm to distribute dominant genetically altered (GA) lines, potentially saving travel-induced stress to the male frogs, reducing their numbers used and making Xenopus experiments more cost effective.
机译:从基因改造的非洲爪蟾中低温储存精子可以提高成本效益和与研究中使用有关的动物福利;目前,这对于热带假单胞菌是常规的,但对于X.laevis不可靠。在这里,我们直接比较非洲爪蟾精子冻融的三种公开方案,并确定精子的储存温度,睾丸浸渍方法和冷冻方案的延迟是否会影响X.Laevis的成功受精和胚胎发育。我们得出的结论是该协议是可靠的,并且观察到的受精率差异是由于个体之间的差异所致。我们表明,由冷冻融化的精子制成的胚胎是正常的,并且它们发育成的成虫与该菌落中的其他繁殖繁殖地没有区别。这为使用冷冻保存的精子分配占主导地位的基因改变(GA)系开辟了道路,有可能节省雄性青蛙旅行引起的压力,减少其使用数量,并使非洲爪蟾实验更具成本效益。

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