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Related Experiment Videos

Catch-up growth

J P Williams

    Journal of Embryology and Experimental Morphology
    |October 1, 1981
    PubMed
    Summary
    This summary is machine-generated.

    Catch-up growth, which restores normal growth after a potential deficit, appears to be a cellular phenomenon. Experiments in rats suggest that while the mismatch concept is valid, a single central mechanism for catch-up growth is unlikely.

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    Area of Science:

    • Physiology
    • Developmental Biology
    • Growth Science

    Background:

    • Catch-up growth is defined as accelerated growth velocity to normalize stature after a period of slowed growth.
    • It is distinct from compensatory growth, which addresses actual losses and often affects specific organs.
    • Previous theories, like Winick's cellular explanation and Tanner's mismatch hypothesis, have been proposed.

    Purpose of the Study:

    • To investigate the cellular basis of catch-up growth.
    • To test Tanner's mismatch hypothesis using body weight and nose-rump length in rats.
    • To determine if a single central mechanism underlies catch-up growth.

    Main Methods:

    • Experiments were conducted on rats of various ages.
    • The degree of mismatch between actual size and 'planned' size was assessed.

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  • Catch-up growth was evaluated for body weight and nose-rump length parameters.

    • Main Results:

    • Body weight and nose-rump length exhibited different catch-up growth patterns.
    • The concept of size mismatch appears acceptable.
    • Evidence for a single, central mechanism controlling catch-up growth was not supported.

    Conclusions:

    • Catch-up growth is likely a cellular phenomenon.
    • The mismatch mechanism, while valid, may not be centrally regulated.
    • Different physiological parameters may have distinct catch-up growth mechanisms.