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This article reviews the molecular characteristics of human hair keratins, noting their distinct classification from epidermal keratins and the variability in expression that may occur without noticeable hair changes, but reports no new study results.

Different keratin proteins are expressed in various epithelial cells at different stages, affecting cell structure and function.

This study suggests that the epidermis of monotremes and marsupials exhibits a more primitive pattern of protein distribution compared to eutherian mammals, with differences in loricrin distribution and keratinocyte maturation.

This study developed an in vitro model using human follicular keratinocytes to observe selective cell growth and differentiation, potentially aiding future research on hair biology and growth processes.

This study demonstrated that a keratin gel promotes nerve regeneration across critical defects in rabbit models, showing improved nerve conduction and muscle action potential compared to control treatments.

This study shows that microdiffraction experiments reveal structural layers in keratinous tissues, each with different keratin types, potentially explaining their dual role as mechanical support and chemical barriers.

This article reviews the challenges in studying keratin proteins and emphasizes the potential of modern proteomic techniques to advance their research, but it reports no new findings.

This study found that the extraction-resistant structures in hair, feathers, and hagfish teeth are due to ε-(γ-glutamyl)lysine cross-linked proteins, emphasizing their role in maintaining the integrity of these materials.

Keratin in mouse hair follicles is complex and plays specific roles.

Advancements in hair keratin research could lead to better hair health treatments.

This article discusses the structure and protective function of pangolin scales, emphasizing their composition of α-keratins and β-keratins, and highlights evolutionary keratin diversification in tetrapods; it reports no new empirical findings.

This chapter reviews keratins in skin epithelia, including their roles in cellular function and disease, and reports no new experimental results.

This article describes the structure and components of hair cuticle cells and their intercellular junctions but reports no new clinical results.

This study found that keratin and other hair proteins in humans are extensively modified posttranslationally, which helps explain the structural characteristics of mature hair.

This article reviews the role of keratins in epithelial function and structure, discussing their involvement in growth control, organelle functions, and pathomechanisms of disorders, but reports no new clinical results.

This review discusses the role of keratins in maintaining epidermal structure and function and reports no new results; the authors emphasize the lack of rational therapies for skin disorders linked to keratin mutations.

CTA is often mistaken for AA but doesn't respond to steroids and may require hair transplantation.

This report expands the known genetic mutations linked to monilethrix by identifying new patients with KRT83 mutations, confirming its role as a causative gene for this hair disorder.

This review discusses advances in understanding epidermal biology and pathology over the past two decades and highlights the significant progress yet acknowledges that much remains to be discovered; no new clinical results are reported.

This review discusses the recent advancements in understanding how keratins influence cytoarchitecture, cell dynamics, and disease processes but reports no new clinical results; the authors highlight its roles in development and diseases like cancer.

This study found that cells isolated from human scalp hair follicles proliferated well in a specific culture medium and possessed keratins characteristic of hair-forming cells.

This article discusses the importance of understanding the skin's structure and function for comprehending both healthy skin biology and skin disease pathophysiology, but reports no new findings.

This study found that hair follicle-specific keratins can form different structural assemblies depending on ionic conditions, with hair cortex keratins requiring physiological salt conditions to form intermediate filaments.

This article reviews keratin disorders and highlights recent progress in therapeutic approaches, including a clinical trial for pachyonychia congenita using siRNA, but reports no new clinical findings.