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    Did you mean Epidermal Homeostasis?
    GlossaryEpidermal Homeostasis

    balanced renewal of skin cells maintaining skin's protective function

    Epidermal homeostasis refers to the balanced state of the outermost layer of the skin, where old skin cells are continuously shed and replaced by new ones. This process ensures that the skin remains healthy, resilient, and capable of performing its protective functions. For professionals, it involves a complex interplay of cellular proliferation, differentiation, and apoptosis, regulated by various signaling pathways and environmental factors.

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      research Plakophilin 1 Suppresses Keratinocyte Innate Immune Responses Through DExD/H Helicases

      December 2025
      Plakophilin 1 (PKP1) plays a crucial role in regulating innate immune responses in keratinocytes by sequestering specific dsRNA sensing DExD/H-box RNA helicases, thereby limiting their activation of the MDA5-MAVS signaling axis. This action prevents excessive activation of transcription factors IRF3 and NFκB, reducing the transcription of proinflammatory cytokines like IFN-β1, IL6, and TNFα. Upon dsRNA challenge, PKP1 undergoes proteasomal degradation, releasing the helicases to enable a rapid inflammatory response. PKP1 thus balances epidermal immune homeostasis by providing a barrier against harmful substances and suppressing excessive immune responses, with its loss leading to conditions like ectodermal dysplasia-skin fragility syndrome (EDSFS).
      Choreographing Immunity in the Skin Epithelial Barrier

      research Choreographing Immunity in the Skin Epithelial Barrier

      57 citations , March 2019 in “Immunity”
      The document concludes that the skin's immune system is complex, involving interactions with hair follicles, nerves, and microbes, and can protect or cause disease, offering targets for new treatments.

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