Gene regulatory landscape of the sonic hedgehog locus in embryonic development

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  • Takanori Amano
    Next Generation Human Disease Model Team RIKEN BioResource Research Center Tsukuba Japan

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<jats:title>Abstract</jats:title><jats:p>The organs of vertebrate species display a wide variety of morphology. A remaining challenge in evolutionary developmental biology is to elucidate how vertebrate lineages acquire distinct morphological features. Developmental programs are driven by spatiotemporal regulation of gene expression controlled by hundreds of thousands of cis‐regulatory elements. Changes in the regulatory elements caused by the introduction of genetic variants can confer regulatory innovation that may underlie morphological novelties. Recent advances in sequencing technology have revealed a number of potential regulatory variants that can alter gene expression patterns. However, a limited number of studies demonstrate causal dependence between genetic and morphological changes. Regulation of <jats:italic>Shh</jats:italic> expression is a good model to understand how multiple regulatory elements organize tissue‐specific gene expression patterns. This model also provides insights into how evolution of molecular traits, such as gene regulatory networks, lead to phenotypic novelty.</jats:p>

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