The Mammary Hair of Monodelphis Domestica and Homology of the Mammary Pilosebaceous Unit

    August 2024 in “ Journal of Morphology ”
    Daniel J Stadtmauer, Günter P. Wagner
    Studysummary This study observed that developing mammary organs in Monodelphis domestica show mammary hairs in 12-week-old females, which disappear by 18 weeks, with findings suggesting shared characteristics between their nipples and eutherian nipples, supporting the evolutionary link between mammary glands and hair organs.
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    Research cited in this study 4

    1. Identification of Reptilian Genes Encoding Hair Keratin-Like Proteins Suggests a New Scenario for the Evolutionary Origin of Hair Proceedings of the National Academy of Sciences · 2008
    2. Conversion of the Nipple to Hair-Bearing Epithelia by Lowering Bone Morphogenetic Protein Pathway Activity at the Dermal-Epidermal Interface ˜The œAmerican journal of pathology · 2008
    3. Phylogeny of the Hair Follicle: The Sebogenic Hypothesis Journal of Investigative Dermatology · 2007
    4. The Hair Cycle Journal of Cell Science · 2006