Genetics, Gene Regulation, and Expression
Expression profiling of genes crucial for placental and preimplantation development in bovine in vivo, in vitro, and nuclear transfer blastocysts
Version of Record online: 16 MAY 2005
Copyright © 2003 Wiley-Liss, Inc.
Molecular Reproduction and Development
Volume 72, Issue 1, pages 16–24, September 2005
How to Cite
Hall, V. J., Ruddock, N. T. and French, A. J. (2005), Expression profiling of genes crucial for placental and preimplantation development in bovine in vivo, in vitro, and nuclear transfer blastocysts. Mol. Reprod. Dev., 72: 16–24. doi: 10.1002/mrd.20337
- Issue online: 24 JUN 2005
- Version of Record online: 16 MAY 2005
- Manuscript Accepted: 8 FEB 2005
- Manuscript Received: 21 DEC 2004
- nuclear reprogramming;
- messenger RNA;
Placental abnormalities and failed implantation are characterized phenotypes that occur in many species as a result of somatic cell cloning. This study examines a number of genes, critical for early placental development and reports aberrant expression patterns in a number of cloned bovine blastocysts, thus implicating a role of these genes in failed implantation. Messenger RNA (mRNA) expression of eight genes critical for early placental and preimplantation development including Acrogranin, Cdx2, Eomes, ErbB3, ERR2, Hand1, MRJ, and Rex1 were analyzed in single, in vivo, in vitro, and cloned bovine blastocysts (produced by hand-made cloning (HMC) and serial hand-made cloning (SHMC)) following complementary DNA (cDNA) amplification with a SMART cDNA synthesis kit. Aberrant expression of Acrogranin, Cdx2, and ERR2 was detected in a number of blastocysts produced by SHMC. Other genes, Eomes and Hand1, were not detectable in, in vivo bovine blastocysts, suggesting a differential expression pattern between bovine and murine embryos. A number of control marker genes including Oct4, IFN-τ, and PolyA were expressed in all single blastocysts analyzed. This is the first study to report that failure of implantation may be due to aberrant expression of genes in the preimplantation cloned embryo, which are crucial for the early regulation and differentiation of the placenta. Mol. Reprod. Dev. © 2005 Wiley-Liss, Inc.