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This study indicates that reduced activity of the matriptase-prostasin proteolytic cascade is likely the cause of human autosomal recessive ichthyosis with hypotrichosis, as demonstrated using a novel mouse model.

This article describes a procedure involving skin marking, tumescent anesthesia, and micrograft mobilization, but does not present any study findings or results.

The authors concluded that establishing and standardizing methods for data collection are crucial to improving PCOS diagnosis and research due to challenges observed in data harmonization across diverse international cohorts.

This study reported that age and diabetes are major factors influencing trichilemmal cyst development and size, highlighting the importance of these conditions for risk assessment and surgical planning.

This narrative review discusses the promising role of photobiomodulation in dermatology, emphasizing its non-invasive nature and potential benefits, but acknowledges the need for further research to establish standard protocols.

This study found that prostasin's proteolytic activity is necessary for normal hair follicle development in mice, but not for interfollicular epidermal development.

This article reports an unprecedented case of trichofolliculoma in the gluteal area, previously unreported in English literature.

This study found that follicular streamers are mostly present in non-scarring alopecia cases, and tracking their location can improve diagnosis accuracy.

This review discusses hair abnormalities in various epidermolysis bullosa subtypes and reports no new clinical findings.

This review discusses the association between scarring alopecia and inflammatory processes in common acquired bullous disorders of the scalp, and reports no new clinical findings.

This study found that transplanting trichogenous dermal cells significantly enhanced the restoration of in vivo-damaged hair follicles in a nude rat model, with a combination of dermal papilla and sheath cells proving more effective than either cell type alone.

This study describes how arrector pili muscles form a single muscular structure shared by all hair follicles within a follicular unit at the isthmus level in scalp skin.

This chapter discusses the skin stem cell niche as a complex ecosystem and highlights the diverse components and interactions that influence stem cell function, but it reports no new experimental results.

This study observed similar D2-40 expression in scarring and nonscarring alopecia, with some increase in scarring cases, suggesting possible Fos-dependent mechanisms, though more research is needed for definitive conclusions.

This study suggests that S100A4 and S100A6 proteins may play key roles in activating stem cells for hair follicle regeneration in mice.

This review summarizes the anatomy and physiology of the arrector pili muscle and discusses its potential role in hair loss disorders, reporting no new clinical results.

This study found that ionizing radiation primarily affects keratinocyte stem cells in the hair follicle, suggesting they play a central role in radiation-induced hair graying, rather than melanocyte stem cells.

This study reports that the side population technique can isolate melanocyte stem cells from human hair follicles, potentially allowing them to be used for skin pigmentation repopulation.

In this study, one type of commercial culture medium supported expression of stem cell markers in hair follicle epithelial stem cells, but their differentiation potential and hair follicle-inducing ability declined over time.

The document concludes that understanding hair biology is key to treating hair disorders, with gene therapy showing potential as a future treatment.

This review discusses recent advancements in hair follicle regeneration technologies, including the authors' own development of functional hair regeneration through bioengineered follicle germ transplantation, but reports no new clinical results.

This book reviews the various types of acne and acneiform conditions, as well as their treatment options, with expert insights from multiple fields.

This case study highlights that vitamin B12 deficiency can cause reversible hyperpigmentation, illustrated by a vegetarian female patient whose skin lesions improved after treatment.

Hair can regrow after certain stem cells are lost because other stem cells can take over their role.

This study found that the dermal papilla of the hair follicle regulates stem cell quiescence and regeneration by modulating Shh and Wnt signaling pathways, highlighting the importance of signaling cross talk in regeneration.

In this study, the researchers found that deleting ceramide synthase 4 in the skin's epidermis alters stem cell differentiation, disrupting hair follicle structure and barrier function, potentially leading to immune responses similar to atopic dermatitis.

In this study, increased corticosterone from chronic stress prolonged hair follicle stem cell quiescence in mice, inhibiting regeneration, but restoring Gas6 expression overcame this inhibition.

This review explores recent insights into the diverse cell populations involved in skin development, homeostasis, wound healing, and cancer progression but reports no new results.

This study found that Smad7 perturbs hair follicle development while promoting sebaceous gland formation by antagonizing Wnt/β-catenin signaling in transgenic mice.

This study reported that while no effective treatment exists for frontal fibrosing alopecia, oral 5-alpha-reductase inhibitors showed the most promise, inducing a good clinical response in 45% of patients.