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Related Experiment Videos

Sweat gland function in isolated perfused skin.

K G Johnson

    The Journal of Physiology
    |September 1, 1975
    PubMed
    Summary
    This summary is machine-generated.

    This study explored the neurochemical control of sweating in animal skin using perfusion techniques. Different animal species exhibit distinct sweat responses to various drugs, revealing species-specific adrenergic mechanisms in sweat gland function.

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    Area of Science:

    • Veterinary Physiology
    • Animal Dermatology
    • Neuroendocrinology

    Background:

    • Sweating patterns vary significantly among domestic animals.
    • Understanding the neurochemical basis of sweating is crucial for animal welfare and thermoregulation research.
    • Previous studies have not fully elucidated the specific mechanisms controlling sweat gland activity in different species.

    Purpose of the Study:

    • To investigate the neurochemical control of sweating in excised skin of sheep, goats, cattle, horses, and donkeys.
    • To identify specific neurotransmitters and hormones that elicit sweating responses.
    • To differentiate between mechanisms controlling sweat secretion and myoepithelial contraction.

    Main Methods:

    • Utilized a skin perfusion technique with excised skin from various domestic animals.

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  • Measured evaporative water loss as an indicator of sweating.
  • Administered various drugs, including adrenaline, noradrenaline, and others, to the perfusate to observe sweat responses.

    • Main Results:

    • Adrenaline and noradrenaline elicited brief sweat discharges in sheep and goats, while cattle showed longer-lasting responses to adrenaline.
    • Horse and donkey skin exhibited brief discharges with noradrenaline, oxytocin, and bradykinin, but continuous sweating with isoprenaline and adrenaline.
    • Equine sweat glands appear to have alpha-adrenergic control of myoepithelium and beta-adrenergic control of secretion; sheep and goats show alpha-adrenergic myoepithelial control with weak secretion; cattle have alpha-adrenergic secretion control.

    Conclusions:

    • Different animal species possess distinct neurochemical mechanisms regulating sweat gland activity.
    • Adrenergic pathways play a significant role in controlling both sweat secretion and myoepithelial contraction, with species-specific variations.
    • The findings provide insights into the physiological differences in thermoregulation and sweating across domestic animals.