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BOR - Papers in Press, published online ahead of print December 22, 2004.
Biol Reprod 2004, 10.1095/biolreprod.104.034801
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BIOLOGY OF REPRODUCTION 72, 960–967 (2005)
DOI: 10.1095/biolreprod.104.034801
© 2005 by the Society for the Study of Reproduction, Inc.

Identification of Differentially Regulated Genes During Elongation and Early Implantation in the Ovine Trophoblast Using Complementary DNA Array Screening1

L. Cammas, P. Reinaud, O. Dubois, N. Bordas, G. Germain, and G. Charpigny2,

Biologie du Développement et de la Reproduction, INRA, Centre de Recherches de Jouy, 78352 Jouy en Josas Cedex, France

Following hatching, pre-elongated conceptuses undergo elongation by intense proliferation, until implantation. We investigated the changes in gene expression associated with these physiological events using human cDNA arrays containing 2370 known genes. Comparison of pre-elongated, elongated, and implanting trophoblasts allowed the determination of 313 expressed genes, 63 of which were differentially regulated. These were classified into four functional families. Pre-elongated trophoblasts were characterized by preferential expression of genes involved in protein trafficking, whereas only latter developmental stages expressed cell signaling genes and receptors. Among the 63 developmentally regulated genes, four exhibited the highest levels of expression (TMSB10, CTNNA1, NMP1, and CX3CL1). Each of these also represents a functional family and display a specific expression pattern. One of them, CX3CL1 (CX3C chemokine, also known as fractalkine), is a chemokine that seems to have potential importance in trophoblast development, and which deserves further clarification of its role in implantation.

1 L.C. was supported by a fellowship from Ministère Français de l'Education Nationale, de l'Enseignement et de la Recherche.

2 Correspondence: Gilles Charpigny, INRA, Domaine de Vilvert, Biologie du Développement et de la Reproduction, Centre de Recherches de Jouy, 78352 Jouy en Josas Cedex, France. FAX: 33 1 34 65 23 64; gilles.charpigny{at}jouy.inra.fr






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Copyright © 2005 by the Society for the Study of Reproduction.