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This review discusses the chemical stability of protein envelopes found in the epidermis and other stratified squamous epithelia, but reports no new clinical results.

This study proposes that the ability of humans to grow long scalp hair is linked to the evolutionary adjustment of molecular checkpoints that regulate the hair growth cycle, potentially influenced by its roles in communicating age, maturity, and social signals.

This chapter discusses the structure and function of the skin, detailing its protective roles and the layers that comprise it, but reports no new research findings.

This study identified the distribution of keratin-associated proteins during cornification in the epidermis of reptiles, revealing unique structural characteristics in sauropsid keratin proteins compared to other vertebrates.

This study found that differentiated cells of the corneal epithelium can be converted to hair and interfollicular epidermis through a multistep process involving dermal developmental signals.

This study identified ectomesenchyme as a major source of epidermal stem cells in mouse skin, with ectomesenchymal keratinocytes occupying a significant portion of the epidermal stem cell-enriched population.

This chapter defines skin integrity as a blend of intact structural elements and adaptable functional capacity, highlighting its importance in maintaining skin health across various conditions but reports no new research findings.

This study demonstrated that hiPSC-derived hair-bearing skin organoids lacked sufficient type VII collagen at the epidermal-dermal junction, indicating a need for further maturation to model certain forms of epidermolysis bullosa effectively.

This study found that acne lesion formation involves early hyperkeratinization and inflammation around hair follicles, creating a self-sustaining cycle that may progressively worsen acne.

This study demonstrates that human epidermal stem cells can adapt to environmental temperature changes through mTOR signaling, and prolonged inhibition of mTORC1 supports stem cell maintenance, which may be vital for regenerative medicine.

This review discusses changes in keratin structure or gene expression that result in various skin disorders and reports no new clinical findings.

This study reports that caspase-14's expression pattern in the epidermis and hair follicles is highly conserved across diverse mammalian species, suggesting its early evolutionary role in mammalian skin maturation.

This review discusses the early phases of melanomagenesis and the factors influencing melanoma cell variability and reports no new clinical results.

This study reports that human eccrine sweat gland cells are capable of forming a stratified epidermis, suggesting they may serve as an additional source of keratinocytes for skin repair.

This article reviews how anatomical differences in skin arise and persist, and suggests the underlying molecular positional code is more complex than apparent, but reports no new research findings.

Balanced protease activity is crucial for healthy skin and hair development.

This study found that cutaneous stem cells in the basal layer of fetal human skin contribute to the development of the epidermis and hair follicles, with specific marker expressions during different stages of skin development.

This study reports differential gene expression in the leading edge and inner surface epithelial cells of murine eyelids, suggesting that distinct signaling pathways are active during embryonic eyelid closure.

This study found that loss of integrin-β4 or its ligand, laminin-α3β3ɣ2, in keratinocytes increases differentiation via delamination, and demonstrated a role for hemidesmosomes in epidermal differentiation through both mitotic and non-mitotic mechanisms, influenced by Notch signaling.

This study used single-cell RNA sequencing to identify at least nine subpopulations of keratinocytes in human neonatal epidermis, revealing unexpected heterogeneity and complex differentiation trajectories.

This article reviews the physiological skin changes and unique dermatoses in pregnancy, discussing their causes and management, but reports no new clinical findings.

This study identifies key transcriptomic features and a necessary dermal niche for eccrine gland development, advancing potential regenerative approaches for these vital skin appendages.

In this study, autotransplanted interfollicular epidermis keratinocytes in a collagen dermis framework formed follicular-like structures, but their proliferation ceased after 15-20 days.

This article, a special issue on hair follicle biology and pathology, reports no new research findings.