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Somatotropin and lactation.

C J Peel, D E Bauman

    Journal of Dairy Science
    |February 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Biotechnology-produced somatotropin significantly boosts dairy cow milk yield by up to 40%. This dairy industry innovation enhances milk production through coordinated physiological changes without adverse health effects in cows.

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    Area of Science:

    • Animal Science
    • Biotechnology
    • Dairy Industry

    Background:

    • Somatotropin (ST) is now available through biotechnology.
    • Its potential impact on the dairy industry is substantial.
    • Previous studies indicate increased milk yield with ST administration.

    Purpose of the Study:

    • To evaluate the impact of somatotropin on dairy cow milk production.
    • To investigate the physiological mechanisms underlying ST-induced milk yield increases.
    • To assess the safety of somatotropin for cows and consumers.

    Main Methods:

    • Daily injections of somatotropin were administered to dairy cows.
    • Nutrient intake and metabolic changes were monitored.
    • Physiological responses and milk composition were analyzed.

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  • Safety data from existing studies were evaluated.

    • Main Results:

    • Milk yield increased by up to 40% with daily somatotropin injections.
    • Cows adjusted nutrient intake to support higher milk production.
    • Short-term administration linked to metabolite changes (glucose, free fatty acids); long-term linked to feed intake and weight changes.
    • No adverse health effects observed in cows, though studies were less than a full lactation.

    Conclusions:

    • Somatotropin offers significant potential for increasing dairy milk yield.
    • Milk production increases are supported by coordinated physiological and metabolic adjustments.
    • Further research is needed for long-term lactation effects, but current data suggest safety for animals and consumers.