Key skin processes

Key skin processes" is not a specific molecule, receptor, or canonical therapeutic target. Instead, it refers to a collection of fundamental biological activities essential for maintaining skin homeostasis. These include epidermal barrier formation, hair regeneration, wound repair, collagen synthesis and degradation, cell proliferation and differentiation, tissue remodeling, and responses to environmental stimuli. Multiple molecular pathways are involved in these processes—such as mTOR signaling for metabolism regulation in keratinocytes; collagen production by fibroblasts; breakdown by matrix metalloproteinases; inhibition by TIMPs; and cytokine/growth factor signaling like IL‑15 for regeneration[1][2]. Because "key skin processes" does not refer to a single defined molecular entity but rather an array of interconnected physiological mechanisms involving many targets and pathways, it is not considered a valid or specific therapeutic target on its own.