Expression of all Wnt genes and their secreted antagonists during mouse blastocyst and postimplantation development.

Caroline Kemp, Erik Willems, Shaaban ABDO, Louis LAMBIV Wanyu, Luc Leyns

Research output: Contribution to journalArticle

165 Citations (Scopus)

Abstract

In this extensive study, real-time reverse transcriptase-polymerase chain reaction was used to analyze the expression levels of all 19 Wnt genes and their 11 potential antagonists in mouse blastocysts, pregastrula, gastrula, and neurula stages. By complementing these results with in situ hybridization, we revealed new expression domains for Wnt2b and Sfrp1, respectively, in the future primitive streak at the posterior side and in the anterior visceral endoderm before the initiation of gastrulation. Moreover, the anterior visceral endoderm expresses three secreted Wnt antagonists (Sfrp1, Sfrp5, and Dkk1) in partially overlapping domains. We also identified expression patterns for the Wnt1, Wnt3a, Wnt6, Wnt7b, Wnt9a, Wnt10b, and Sfrp1 genes at the blastocyst stage. In particular, the expression of Wnt1 and Sfrp1 predominantly in the inner cell mass and of Wnt9a in the mural trophoblast and inner cell mass cells surrounding the blastocoele suggests new roles for the Wnt pathway in preimplantation development. This article is the first report on the regional expression of Wnt genes in the mouse blastocyst.
Original languageEnglish
Pages (from-to)1064-1075
Number of pages12
JournalDevelopmental Dynamics
Volume233
Issue number3
Publication statusPublished - 2005

Keywords

  • Wnt antagonist
  • Wnt
  • Mouse
  • Embryo
  • qRT-PCR

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