Cross-species fertilization: the hamster egg receptor, Juno, binds the human sperm ligand, Izumo1.

Cross-species fertilization: the hamster egg receptor, Juno, binds the human sperm ligand, Izumo1.
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DOI:
10.1098/rstb.2014.0101
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发表时间:
2015-02-05
期刊:
Philosophical transactions of the Royal Society of London. Series B, Biological sciences
影响因子:
--
通讯作者:
Wright GJ
Wright GJ
中科院分区:
其他
文献类型:
--
作者:
Bianchi E;Wright GJ

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受精是有性生殖的最高阶段,需要单倍体精子和卵子的识别和融合,形成一个新的二倍体生物。这些识别事件的特异性是不同物种的精子和卵子通常不相容的原因之一。一个值得注意的例外是来自叙利亚金黄仓鼠(Mesocricetus auratus)的无透明带卵子识别并与人类精子融合的不寻常能力,这一现象已被用于评估辅助生育治疗中的精子质量。继我们最近发现精子和卵子识别受体Izumo1和Juno之间的相互作用对受精至关重要之后,我们现在证明了来自不同物种的Izumo1和Juno相互作用的能力之间的一致性,以及它们分离的配子在体外相互交叉受精的能力。特别是,我们表明来自金仓鼠的Juno可以直接与人类Izumo 1相互作用。这些数据表明,Izumo1和Juno之间的相互作用在跨物种配子识别中起着重要作用,并可能为开发改进的预后测试提供信息,这些测试不需要使用动物来指导不孕夫妇最合适的生育治疗。
Fertilization is the culminating event in sexual reproduction and requires the recognition and fusion of the haploid sperm and egg to form a new diploid organism. Specificity in these recognition events is one reason why sperm and eggs from different species are not normally compatible. One notable exception is the unusual ability of zona-free eggs from the Syrian golden hamster (Mesocricetus auratus) to recognize and fuse with human sperm, a phenomenon that has been exploited to assess sperm quality in assisted fertility treatments. Following our recent finding that the interaction between the sperm and egg recognition receptors Izumo1 and Juno is essential for fertilization, we now demonstrate concordance between the ability of Izumo1 and Juno from different species to interact, and the ability of their isolated gametes to cross-fertilize each other in vitro. In particular, we show that Juno from the golden hamster can directly interact with human Izumo1. These data suggest that the interaction between Izumo1 and Juno plays an important role in cross-species gamete recognition, and may inform the development of improved prognostic tests that do not require the use of animals to guide the most appropriate fertility treatment for infertile couples.
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