Gender Differences in Mouse Skin Morphology and Specific Effects of Sex Steroids and Dehydroepiandrosterone

    Lamia Azzi‐Martin, Mohamed Elalfy, Céline Martel, Fernand Labrie
    TLDR Male and female mice have different skin thickness, and hormones affect their skin and hair growth differently.
    The study examined the effects of sex steroids and dehydroepiandrosterone (DHEA) on skin morphology and hair growth in male and female mice, involving 70 mice. It found that male mice had thicker skin overall, while females had thicker epidermis and hypodermis. Gonadectomy (GDX) led to decreased epidermal thickness in females but increased it with 17β-estradiol (E2) treatment in both sexes. Dihydrotestosterone (DHT) and DHEA increased dermal thickness, especially in GDX females, and all three hormones reduced hypodermal thickness. GDX also triggered rapid hair growth, with thicker hair shafts in females. The study concluded that androgens and estrogens played specific roles in skin layer morphology and hair growth, with DHEA acting through both androgenic and estrogenic pathways.
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