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Maternally derived transferrin in pigeon squabs.

J A Frelinger

    Science (New York, N.Y.)
    |March 26, 1971
    PubMed
    Summary
    This summary is machine-generated.

    Newly hatched squabs receive most of their transferrin from their mother via the egg, not crop milk. This maternal transferrin is detectable for two weeks, while the squab

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    Area of Science:

    • * Avian physiology and developmental biology.
    • * Focuses on maternal-fetal transfer in birds.

    Background:

    • * Transferrin is crucial for iron transport in vertebrates.
    • * Understanding its acquisition in avian neonates is important for developmental studies.

    Purpose of the Study:

    • * To determine the source of transferrin in newly hatched squabs.
    • * To investigate the role of maternal transferrin versus endogenous synthesis.

    Main Methods:

    • * Utilized genetically marked transferrin to trace its origin.
    • * Analyzed transferrin levels in squabs at different developmental stages.

    Main Results:

    • * A significant portion of squab transferrin originates maternally through the egg.

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  • * Maternal transferrin is detectable up to 14 days post-hatching.
  • * Squabs begin synthesizing their own transferrin from hatching, but it's not detectable until day 8.

    • Conclusions:

    • * Maternal transferrin provides essential iron transport during early squab development.
    • * This highlights a significant trans-ovarian transfer mechanism in birds.
    • * Endogenous transferrin production becomes significant after the first week of life.