Genetically Null Mice Reveal a Central Role for Epidermal Growth Factor Receptor in the Differentiation of the Hair Follicle and Normal Hair Development
June 1997
in “
PubMed
”
Studysummary In this study, disrupting the epidermal growth factor receptor in mice led to abnormal hair and skin development, characterized by disorganized hair follicles and systemic disease, providing a model for understanding EGFR's role in skin biology.
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The study revealed that mice lacking the epidermal growth factor receptor (EGFR) had severely disorganized hair follicles, a fuzzy coat, and systemic disease causing death before 3 weeks. Grafted EGFR null skin showed hair follicles that could not transition from anagen to telogen, resulting in abnormal hair fibers and complete hair loss in 67% of grafts by 10 weeks due to inflammation. The absence of EGFR decreased proliferation in the interfollicular epidermis but caused persistent hyperplasia in grafted skin, underscoring EGFR's critical role in hair follicle differentiation, immune protection, and epidermal proliferation.
