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Related Concept Videos

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During embryogenesis, cells become progressively committed to different fates through a two-step process: specification followed by determination. Specification is demonstrated by removing a segment of an early embryo, “neutrally” culturing the tissue in vitro—for example, in a petri dish with simple medium—and then observing the derivatives. If the cultured region gives rise to cell types that it would normally generate in the embryo, this means that it is specified. In...
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Related Experiment Video

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Analysis of Neural Crest Migration and Differentiation by Cross-species Transplantation
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Comparative Analysis of Neural Crest Development in the Chick and Mouse.

J A Morrison, I Pushel, R McLennan

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    |November 22, 2024
    PubMed
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    Researchers identified conserved gene expression patterns in neural crest (NC) cell migration using chick and mouse embryos. This reveals new insights into the transcriptional programs guiding cell movement during development.

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    Area of Science:

    • Developmental Biology
    • Genetics
    • Molecular Biology

    Background:

    • Gene regulatory networks (GRNs) controlling neural crest (NC) cell development are incompletely understood due to reliance on disparate model organisms.
    • Limited insights exist into the diversity and conservation of genes involved in NC cell differentiation and invasion.

    Purpose of the Study:

    • To investigate conserved transcriptional signatures in NC cell migration using a comparative approach in avian and mouse embryos.
    • To identify novel genes and regulatory mechanisms governing NC cell migration.

    Main Methods:

    • Integrated analysis of chick (HH13) and mouse (E9.5) embryo tissues during NC cell migration.
    • Comparative transcriptomics to identify shared and distinct gene expression patterns.
    • Multiplexed fluorescence in situ hybridization (FISH) to confirm gene expression localization.

    Main Results:

    • Identified a cluster of NC cells with shared expression of key genes (Lmo4, Tfap2B, Sox10, Twist1) in both mouse and chick.
    • Discovered a conserved transcriptional signature (KAZALD1, BAMBI, DES, GPC3) in the NC cell migratory wavefront of both species.
    • Confirmed restricted expression of these genes to leader NC cells in mouse embryos.

    Conclusions:

    • Novel insights into the transcriptional programs underlying NC cell migration were obtained.
    • Established a foundation for future comparative functional analyses of NC cell development.
    • Highlighted the utility of the avian embryo model for developmental studies.