73 results found
  1. Eph and Ephrin function in dispersal and epithelial insertion of pigmented immunocytes in sea urchin embryos

    Oliver A Krupke et al.
    Eph receptor signaling commonly excludes migrating embryonic cells from regions of high ligand density; however, in sea urchin embryos pigmented immunocytes are attracted to regions expressing high levels of Ephrin.
    1. Developmental Biology and Stem Cells
    2. Genetics and Genomics

    Deployment of a retinal determination gene network drives directed cell migration in the sea urchin embryo

    Megan L Martik, David R McClay
    The gene regulatory network controlling directed cell migration in a sea urchin is strikingly similar to a sub-circuit for eye development in Drosophila, suggesting that ancient systems-level controls may be adapted for diverse functions in different animals.
    1. Cell Biology
    2. Developmental Biology and Stem Cells

    Early asymmetric cues triggering the dorsal/ventral gene regulatory network of the sea urchin embryo

    Vincenzo Cavalieri, Giovanni Spinelli
    During early embryogenesis of the sea urchin, asymmetrical positioning of the dorsal/ventral organizer relies upon the suppression of organizer activities in dorsal blastomeres by the Hbox12 homeodomain-containing repressor.
    1. Immunology and Inflammation

    IL17 factors are early regulators in the gut epithelium during inflammatory response to Vibrio in the sea urchin larva

    Katherine M Buckley et al.
    Expression of two highly regulated subfamilies of the complex multigene family encoding IL-17 cytokines in the purple sea urchin are sequentially activated in a larval gut-associated inflammation model and modulate downstream gene expression in the gut epithelium.
    1. Developmental Biology and Stem Cells
    2. Evolutionary Biology

    Development: Transforming a transcription factor

    Robert D Burke
    A transcription factor that regulates skeleton formation in sea urchin embryos has evolved a new domain that is essential for this process.
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    1. Developmental Biology and Stem Cells
    2. Evolutionary Biology

    Logics and properties of a genetic regulatory program that drives embryonic muscle development in an echinoderm

    Carmen Andrikou et al.
    A gene regulatory network model provides a simplified explanation of the molecular interactions that orchestrate muscle development in the sea urchin embryo.
    1. Developmental Biology and Stem Cells
    2. Evolutionary Biology

    Functional divergence of paralogous transcription factors supported the evolution of biomineralization in echinoderms

    Jian Ming Khor, Charles A Ettensohn
    A gene duplication event has permitted the functional specialization of a homeodomain transcription factor through changes in exon-intron organization and these changes have supported the evolution of a major, phylum-level morphological novelty.
    1. Immunology and Inflammation

    Cytokines: A gut response

    Matthew L Nicotra
    Unexpected findings from the immune system of sea urchin larvae potentially provide insights into immune signaling in ancestral lifeforms.
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