Mechanisms of formation and functions of the early embryonic cavities. (November 2022)

• Record Type: Journal Article
• Authors: Kim, Yung Su; Bedzhov, Ivan
• Is Part Of: Seminars in cell & developmental biology. Volume 131(2022)
• Page Start: 110
• Page End: 116
• Publication Date: 2022-11
• Subjects: Blastocoel -- Blastocyst -- Proamniotic cavity -- Egg cylinder -- Epiblast -- Implantation; Cytology -- Periodicals; Developmental biology -- Periodicals; 571.6
• DOI: 10.1016/j.semcdb.2022.04.020
• Languages: English
• ISSNs: 1084-9521

Abstract

Abstract: As the early mouse embryo develops, fundamental steps include the sequential formation of the first lumens in the murine conceptus. The first cavity established in the pre-implantation embryo is the blastocoel, followed by the emergence of the proamniotic cavity during the peri-implantation stages. The mouse embryo is a dynamic system which switches its modes of lumenogenesis before and after implantation. The blastocoel emerges in between the basolateral membranes, whereas the proamniotic cavity is formed on the apical interface. Defects in the sculpting of these luminal spaces are associated with developmental abnormalities and embryonic lethality. Here, we review the mechanisms by which these early embryonic cavities are formed and discuss the cavities in terms of their common and stage-specific principles of lumenogenesis and their functions.