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Pig epidermis: a cell kinetic study.

G M Morris, J W Hopewell

    Cell and Tissue Kinetics
    |July 1, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Pig skin cell kinetics, including basal cell density (BCD) and labeling index (LI), change with age. Outdoor housing significantly impacts LI, while cell cycle time (TC) decreases. Pig skin cell dynamics resemble human skin.

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    Area of Science:

    • Dermatology
    • Cell Biology
    • Animal Science

    Background:

    • Epidermal kinetics are crucial for understanding skin health and aging.
    • Previous studies have explored skin cell dynamics in various species.
    • Pigs serve as a valuable model for human skin research due to physiological similarities.

    Purpose of the Study:

    • To investigate age-related changes in pig epidermal cell kinetics.
    • To determine the impact of housing conditions (indoor vs. outdoor) on skin cell proliferation.
    • To compare pig epidermal kinetic parameters with those of humans.

    Main Methods:

    • Quantified basal cell density (BCD), labeling index (LI), DNA synthesis duration (TS), and cell cycle time (TC) in pig epidermis.
    • Analyzed data from pigs aged 4-27 months.

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  • Compared kinetic parameters between indoor and outdoor housing conditions.

    • Main Results:

    • Basal cell density (BCD) decreased with age up to 15 months, then stabilized.
    • Labeling index (LI) showed a slight age-related decrease but was significantly higher in outdoor-housed pigs due to weathering.
    • DNA synthesis duration (TS) and cell cycle time (TC) did not vary significantly with age, though TC was reduced in outdoor-housed pigs.

    Conclusions:

    • Pig epidermal cell kinetics exhibit age-related changes, particularly in BCD and LI.
    • Environmental factors, such as outdoor housing, profoundly influence skin cell proliferation (LI).
    • The studied kinetic parameters in pigs are comparable to those reported in humans, reinforcing their utility as a model.