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Development, Vol 102, Issue 2 271-278, Copyright © 1988 by Company of Biologists

JOURNAL ARTICLES

Expression of nuclear lamins during mouse preimplantation development

E Houliston, MN Guilly, JC Courvalin and B Maro
Centre de Genetique Moleculaire CNRS, Gif sur Yvette, France.

The expression of nuclear lamins during mouse preimplantation development was studied by immunofluorescence, immunoblotting and immunoprecipitation. Two sera were used, specific either for lamin B or lamins A and C. Both sera gave a positive staining of the nuclear periphery throughout preimplantation development (fertilized eggs to late blastocysts). Immunoblots revealed that the three lamins were present in eggs and blastocysts. However, lamin A from eggs was found to have a higher apparent Mr than lamin A from blastocysts and other mouse cells. Using immunoprecipitation, synthesis of lamin A was detected in eggs while synthesis of lamin B was detected in 8-cell embryos and blastocysts, indicating that at least some of the lamins used during early development do not come from a store in the egg. These results are discussed in relation to the possible role of lamins during cell differentiation.


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© The Company of Biologists Ltd 1988