Blastocyst axis is specified independently of early cell lineage but aligns with the ZP shape - PubMed (original) (raw)

. 2007 May 4;316(5825):719-23.

doi: 10.1126/science.1138591. Epub 2007 Apr 19.

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Blastocyst axis is specified independently of early cell lineage but aligns with the ZP shape

Yoko Kurotaki et al. Science. 2007.

Abstract

The mechanisms controlling the establishment of the embryonic-abembryonic (E-Ab) axis of the mammalian blastocyst are controversial. We used in vitro time-lapse imaging and in vivo lineage labeling to provide evidence that the E-Ab axis of the mouse blastocyst is generated independently of early cell lineage. Rather, both the boundary between two-cell blastomeres and the E-Ab axis of the blastocyst align relative to the ellipsoidal shape of the zona pellucida (ZP), an extraembryonic structure. Lack of correlation between cell lineage and the E-Ab axis can be explained by the rotation of the embryo within the ZP.

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