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Related Experiment Videos

Pigment synthesis in the Himalayan mouse.

S Kidson, B Fabian

    The Journal of Experimental Zoology
    |October 1, 1979
    PubMed
    Summary

    Temperature significantly impacts pigment synthesis in Himalayan mice. Cooler temperatures (15°C) stimulate pigment production in growing hair, while warmer temperatures (30°C) inhibit it.

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    Area of Science:

    • Animal physiology
    • Developmental biology
    • Genetics

    Background:

    • Pigment synthesis is crucial for hair coloration and protection.
    • Himalayan mice exhibit temperature-dependent coat color patterns.
    • Understanding environmental influences on pigment production is key to developmental studies.

    Purpose of the Study:

    • To investigate the effect of ambient temperature on pigment synthesis in Himalayan mice.
    • To determine if temperature influences pigment production in actively growing hair follicles.

    Main Methods:

    • Adult and juvenile Himalayan mice were housed at controlled temperatures (15°C and 30°C).
    • Hair growth was induced in adult mice by plucking.
    • Hair darkening was quantified photographically, and pigment granules were assessed histologically.

    Main Results:

    • Mice housed at 15°C showed pigment synthesis in growing hair follicles.
    • Mice housed at 30°C exhibited an absence of pigment granules in growing hair follicles.
    • Histological analysis confirmed the presence or absence of pigment granules correlating with temperature.

    Conclusions:

    • Ambient temperature is a critical regulator of pigment synthesis in Himalayan mice.
    • Cool temperatures promote pigment production, essential for hair coloration.
    • This study highlights the role of environmental factors in regulating gene expression related to pigmentation.

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