“如果我们了解了胚胎成功发育所需的关键基因,那么我们就可以提高试管婴儿技术,并搞清楚导致妊娠失败的一些原因。”
The scientists, who studied 41 human embryos donated by IVF patients, used the gene-editing tool Crispr/Cas9 to make precise cuts in DNA and deactivate OCT4.
科学家们对接受体外受精的患者捐献的41个人类胚胎进行了研究,使用Crispr/Cas9基因编辑工具精准地切割DNA,令OCT4基因失效。
They found OCT4 appeared to be necessary for an embryo to become a blastocyst, a tiny ball of 200 cells that arises a week after conception and marks a key point in embryonic development.
他们发现OCT4基因似乎是胚胎发育成囊胚的必要因素,囊胚是由200个细胞组成的小球体,在受精后一周左右开始出现,是胚胎发育的关键节点。
Only when an embryo successfully reaches the blastocyst stage does it stand any chance of implanting in the womb.
只有当胚胎成功进入囊胚期,才有可能植入子宫中。
The study, published in the journal Nature, found fewer than a fifth of the test embryos reached the blastocyst stage without OCT4.
这项发表在《自然》杂志上的研究发现,当缺乏OCT4基因时,进入囊胚期的实验胚胎不到1/5。
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