Abstract:
:The monoclonal antibody ECCD-1 inhibits Ca2+-dependent cell-cell adhesion in teratocarcinoma cells, recognizing a cell surface component of MW 124,000. When mouse embryos at various preimplantation stages were cultured in the presence of ECCD-1, the compacted morphology of the 8- to 16-cell-stage embryos was destroyed. In these embryos, cell proliferation normally occurred and development of blastocyst-like vesicles was attained. However, these embryos did not contain inner cell mass (ICM). We found that ECCD-1 affects the pattern of polarization of the cell surface in late 8- and 16-cell-stage blastomeres, as detected by staining with fluorescence-labeled concanavalin A. In normal blastomeres, the pole was always apart from the cell-cell contact plane. In those cultured in ECCD-1, formation of the pole tended to be inhibited, and if observed, the pole was close to the cell-cell contact plane. We discuss the possible mechanisms for inhibition of ICM formation caused by blocking Ca2+-dependent cell-cell adhesion between blastomeres.
journal_name
Celljournal_title
Cellauthors
Shirayoshi Y,Okada TS,Takeichi Mdoi
10.1016/0092-8674(83)90095-8subject
Has Abstractpub_date
1983-12-01 00:00:00pages
631-8issue
3 Pt 2eissn
0092-8674issn
1097-4172pii
0092-8674(83)90095-8journal_volume
35pub_type
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