The lunatic fringe gene is a target of the molecular clock linked to somite segmentation in avian embryos

Michael J. McGrew, J. Kim Dale, Sandrine Fraboulet, Olivier Pourquié (Lead / Corresponding author)

    Research output: Contribution to journalArticlepeer-review

    228 Citations (Scopus)


    The most obvious segments of the vertebrate embryo are the trunk mesodermal somites which give rise to the segmented vertebral column and the skeletal muscles of the body. Mechanistic insights into vertebrate somitogenesis have recently been gained from observations of rhythmic expression of the avian hairy-related gene (c-hairy1) in chick presomitic mesoderm (PSM), suggesting the existence of a molecular clock linked to somite segmentation; reviewed in. Here, we show that lunatic Fringe (IFng), a vertebrate homolog of the Drosophila Fringe gene, is also expressed rhythmically in PSM. The PSM expression of IFng was observed as coordinated pulses of mRNA resembling the expression of c-hairy1. We show that c-hairy1 and IFng expression in the PSM are coincident, indicating that both genes are responding to the same segmentation clock. The genes were found to differ in their regulation, however; in contrast to c-hairy1, IFng mRNA oscillations required continued protein synthesis, suggesting that IFng could be acting downstream of c-hairy1 in the clock mechanism. In Drosophila, Fringe has been shown to play a role in modulating Notch-Delta signalling, a pathway which in vertebrates has been implicated in defining somite boundaries. These observations place the segmentation clock upstream of the Notch-Delta pathway during vertebrate somitogenesis.

    Original languageEnglish
    Pages (from-to)979-982
    Number of pages4
    JournalCurrent Biology
    Issue number17
    Publication statusPublished - 27 Aug 1998

    ASJC Scopus subject areas

    • General Biochemistry,Genetics and Molecular Biology
    • General Agricultural and Biological Sciences


    Dive into the research topics of 'The lunatic fringe gene is a target of the molecular clock linked to somite segmentation in avian embryos'. Together they form a unique fingerprint.

    Cite this