Abstract
Efforts to efficiently derive embryonic stem cells (ESC) from isolated blastomeres have been done to minimize ethical concerns about human embryo destruction. Previous studies in our laboratory indicated a poor derivation efficiency of mouse ESC lines from isolated blastomeres at the 8-cell stage (1/8 blastomeres) due, in part, to a low division rate of the single blastomeres in comparison to their counterparts with a higher number of blastomeres (2/8, 3/8 and 4/8 blastomeres). Communication and adhesion between blastomeres from which the derivation process begins could be important aspects to efficiently derive ESC lines. In the present study, an approach consisting in the adhesion of a chimeric E-cadherin (E-cad-Fc) to the blastomere surface was devised to recreate the signaling produced by native E-cadherin between neighboring blastomeres inside the embryo. By this approach, the division rate of 1/8 blastomeres increased from 44.6% to 88.8% and a short exposure of 24 h to the E-cad-Fc produced an ESC derivation efficiency of 33.6%, significantly higher than the 2.2% obtained from the control group without E-cad-Fc. By contrast, a longer exposure to the same chimeric protein resulted in higher proportions of trophoblastic vesicles. Thus, we establish an important role of E-cadherin-mediated adherens junctions in promoting both the division of single 1/8 blastomeres and the efficiency of the ESC derivation process.
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Acknowledgements
This work received financial support from the Spanish Ministerio de Educación y Ciencia (MEC) projects BIO 2005-04341 and BIO2006-11792, the Generalitat de Catalunya DGR project #2009SGR-00282 and MEC FPU fellowship AP2006-02038. We thank Marc Puigcerver and Jonatan Lucas for their technical assistance.
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González, S., Ibáñez, E. & Santaló, J. Influence of E-Cadherin-Mediated Cell Adhesion on Mouse Embryonic Stem Cells Derivation from Isolated Blastomeres. Stem Cell Rev and Rep 7, 494–505 (2011). https://doi.org/10.1007/s12015-010-9221-7
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DOI: https://doi.org/10.1007/s12015-010-9221-7