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This study suggests that the protease HAT-L4 plays a significant role in maintaining epidermal barrier function to prevent body fluid loss, as its absence in mice led to increased fluid loss and higher mortality.

The researchers reported that components of keratinocytes influence the formation and differentiation of the stratum corneum, the epidermis's most specialized layer.

This study found that blocking apoptosis during the catagen phase in mice disrupts hair follicle stem cell niche architecture, delaying subsequent hair regeneration cycles.

This study found that absence of α3 integrin in mice led to faster wound healing but also caused inflammation, hair loss, and skin defects, suggesting complex roles in skin integrity and repair.

This study found significant upregulation of IDO-1 and IDO-2 in human basal cell carcinomas, suggesting that IDO production may confer immune privilege characteristics to the tumors, potentially impacting their growth.

In their mouse study, Oda et al. found that removing the MED1 gene in the skin led to hair loss and changes in epidermal cell differentiation, indicating MED1's significant role in these processes.

This study found that autophagy plays a role in sebaceous gland function and sebum composition control in mice lacking the Atg7 gene in keratinocytes.

This study found that applying ferrous ferric chloride skin lotions to newborn mice stimulated skin cell proliferation and differentiation, increased hair growth, and inhibited alopecia-related hair loss.

In this study involving genetically modified rats, researchers observed that specific mutations in the vitamin D receptor affect calcium levels and bone formation, emphasizing the receptor's role in maintaining healthy bone density and its importance in regulating hair cycle and skin health.

This study found that inhibiting PI3 kinase in epidermal stem cells reduces YBX1 phosphorylation, thereby decreasing cellular senescence and enhancing wound healing and regeneration in adult-derived skin models.

This study found that apocynin restored COL17A1 expression in human keratinocytes and reduced UVB-induced cellular senescence, DNA damage, and cell cycle arrest.

This study found that hair follicles in both mice and humans may serve as an important site for melatonin synthesis and signaling, potentially influencing hair cycle regulation by modulating keratinocyte apoptosis.

This review discusses the development and role of corneodesmosin in skin and hair follicle integrity, highlighting findings from mouse models and its connection to genetic diseases, with no new experimental results included.

This review discusses how ionizing radiation causes skin damage by inducing cellular senescence in keratinocytes, which secrete inflammatory mediators, recruiting immune cells and exacerbating inflammation, impacting the skin barrier function and healing.

This study found that the natural estrogen Estetrol (E4) may promote hair follicle growth and prevent miniaturization, suggesting its potential as a treatment for hair loss disorders.

This study found that keratin 19 may be a marker for skin stem cells, helping to characterize these cells in different conditions and potentially explaining variations in healing rates between children and adults.

Reactive lipids from aging cells change the extracellular matrix, affecting cell function and inflammation.

Applying pseudoceramide improved skin and hair health.

This study found that the spermidine analog N1-methylspermidine prolonged hair follicle growth and decreased inflammation and oxidative stress in cultured hair follicles, suggesting potential relevance for treating inflammatory scalp diseases.

This review explores the complex relationship between thyroid hormones and skin, discussing potential mechanisms and known interactions but reports no new clinical results, emphasizing the need for further research.

This review discusses the role of cholesterol homeostasis in hair follicle biology and its potential connections to various hair disorders, but it reports no new findings.

This study developed a hydrogel microneedle system combining ginseng-derived exosomes and biomimetic nanoparticles to address oxidative stress, inflammation, and melanocyte deficiency in vitiligo, showing significant repigmentation in mice within 3 weeks by enhancing melanocyte protection and keratinocyte proliferation.

The skin's layers protect, sense, and regulate the body's internal balance, but can be prone to cancer.

This study found that desmocollin 1 is crucial for strong adhesion and barrier maintenance in the mouse epidermis, with its absence leading to skin and hair issues resembling chronic dermatitis.

This study found that the effects of the vitamin D receptor on hair follicle cycling in mice are independent of its ability to bind a hormone, with specific domain mutations influencing hair regrowth outcomes.

This review discusses the multiple factors contributing to skin aging, including cellular changes and environmental influences, and highlights its recognition as a disease with significant implications beyond cosmetic concerns, without reporting new research results.

This review discusses the identification and roles of different epidermal stem cell types in skin homeostasis and repair, and reports no new experimental findings.

In this study, researchers observed that EGFR deficiency in the epidermis affects gene expression related to cell differentiation and structure, highlighting spatial and temporal roles of EGFR during skin and hair follicle development.

This article discusses a novel hypothesis on the role of hair follicles in dandruff pathogenesis, focusing on immune response and inflammation due to scalp microbiota changes and sebum by-products, but reports no new clinical results.

This study demonstrated that mitochondrial function in keratinocytes is crucial for maintaining skin homeostasis and hair follicle development, as its impairment led to disrupted hair morphogenesis and early death in mice.