| Literature DB >> 19882724 |
David Wright1, Zoltan Ferjentsik1, Shang-Wei Chong2, Xuehui Qiu2, Jiang Yun-Jin2, Pascale Malapert3, Olivier Pourquié3, Nick Van Hateren4, Stuart A Wilson4, Claudio Franco5, Holger Gerhardt5, J Kim Dale1, Miguel Maroto1.
Abstract
Somites are formed progressively from the presomitic mesoderm (PSM) in a highly regulated process according to a strict periodicity driven by an oscillatory mechanism. The Notch and Wnt pathways are key components in the regulation of this somitic oscillator and data from Xenopus and zebrafish embryos indicate that the Notch-downstream target Nrarp participates in the regulation of both activities. We have analyzed Nrarp/nrarp-a expression in the PSM of chick, mouse and zebrafish embryos, and we show that it cycles in synchrony with other Notch regulated cyclic genes. In the mouse its transcription is both Wnt- and Notch-dependent, whereas in the chick and fish embryo it is simply Notch-dependent. Despite oscillating mRNA levels, Nrarp protein does not oscillate in the PSM. Finally, neither gain nor loss of Nrarp function interferes with the normal expression of Notch-related cyclic genes. (c) 2009 Wiley-Liss, Inc.Entities:
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Year: 2009 PMID: 19882724 PMCID: PMC3928721 DOI: 10.1002/dvdy.22139
Source DB: PubMed Journal: Dev Dyn ISSN: 1058-8388 Impact factor: 3.780