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Related Experiment Videos

Analysis of elastin gene expression in the developing chick aorta using cloned elastin cDNA.

W Burnett, A Finnigan-Bunick, K Yoon

    The Journal of Biological Chemistry
    |February 25, 1982
    PubMed
    Summary

    Researchers studied chick elastin messenger RNA (mRNA) levels in developing embryos. They found that elastin mRNA significantly increases during development, directly correlating with elastin synthesis rates in the aorta.

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    Area of Science:

    • Molecular Biology
    • Developmental Biology
    • Biochemistry

    Background:

    • Elastin is a crucial protein for tissue elasticity in vertebrates.
    • Understanding the regulation of elastin synthesis during development is key to tissue engineering and regenerative medicine.

    Purpose of the Study:

    • To characterize and quantify elastin mRNA in developing chick embryos.
    • To investigate the relationship between elastin mRNA levels and elastin synthesis rates.

    Main Methods:

    • Sequencing of chick elastin cDNA using the Maxam and Gilbert method.
    • Blot hybridization using nick-translated cDNA to identify and quantify elastin mRNA in chick embryo aortas.
    • Measurement of translatable elastin mRNA and in vivo elastin synthesis rates.

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    Main Results:

    • A 192-base pair insert from the 3' non-translated region of chick elastin mRNA was sequenced.
    • A single 3.5 kilobase species of elastin mRNA was identified in chick embryo aortas.
    • Elastin mRNA levels increased significantly between embryonic days 7 and 14.
    • This increase in mRNA paralleled increased translatable elastin mRNA and in vivo elastin synthesis.

    Conclusions:

    • Elastin synthesis during chick embryonic development is primarily regulated by the abundance of elastin mRNA in the aorta.
    • The study provides insights into the molecular mechanisms controlling elastin production during tissue development.