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This study found that in a population of hair follicles, regenerative cycling stages are regulated by both intrinsic and extrinsic signals, with WNT/BMP signaling mediating interactions among follicles for adaptability.

This study found that the loss of a functional hr gene in mice leads to premature and abnormal hair follicle regression, disrupting normal hair cycling and architecture.

This study found that absence of the vitamin D receptor in keratinocytes impairs canonical Wnt signaling and leads to alopecia due to defects in keratinocyte stem cells.

This review explores the impact of vitamin D deficiency on the skin from a dermatological perspective, but reports no new clinical results.

This case report describes a patient with mutations in both alleles of the vitamin D receptor who exhibited hair loss clinically indistinguishable from generalized atrichia with papules, suggesting a potential genetic pathway shared with the hairless gene.

This study found that mature dermal adipocytes have high plasticity, undergoing dedifferentiation and redifferentiation, which plays a significant role in hair cycling and wound healing.

Different types of stem cells and their environments are key to skin repair and maintenance.

In this study, T3 and T4 were found to directly influence human hair follicles in vitro, enhancing keratinocyte proliferation, prolonging the hair growth phase, and affecting pigmentation.

This review examines current knowledge on human epithelial hair follicle stem cells, their markers, and outlines challenges in translating findings from murine studies to human research, but does not report new experimental results.

This study suggests that vitamin D and calcium signaling play a crucial role in wound healing by regulating stem cell activation through enhanced β-catenin transcriptional activity in mice.

This review discusses recent discoveries about the role of Eda and other TNF-related cytokines in skin appendage development and reports no new experimental results, highlighting developments since the last comprehensive summary in 2003.

The TGF-β family helps control how cells change and move, affecting skin, hair, and organ development.

This study found that the absence of the vitamin D receptor disrupts hair follicle structure during the first catagen in mice, linked to increased expression of the hairless gene.

The researchers observed that overexpression of Wnt10b in a mouse model can induce hair follicle regeneration by switching follicles from the resting phase to the growth phase via the Wnt-β-catenin signaling pathway.

This review examines the role of Hairless, a nuclear receptor corepressor, in regulating Wnt signaling during hair cycling and reports no new clinical results.

This study highlights the complex role of the vitamin D receptor in skin processes, where its disruption, along with calcium and co-regulator imbalances, could contribute to skin cancer development by altering skin differentiation and hair follicle cycling.

This review discusses the role of Edar signaling in hair follicle development and cycling, emphasizing its impact on cell fate, differentiation, and interactions with other pathways, but reports no new results.

This review discusses the unique features of dermal white adipose tissue, its interaction with hair follicles, and its role in skin physiology, reporting no new experimental findings.

This study found that intra-follicular Wnt signaling and dermal BMP signaling oscillate differently during hair cycling in mice, affecting hair wave propagation and phases of hair growth.

This study found that enzymatic conversion of Arg-51 in S100A3 protein to citrulline promotes homotetramer assembly, potentially increasing Ca²⁺ binding required for hair cuticular barrier formation.

This study found distinct gene expression profiles in alopecia areata-affected skin, suggesting T-cell mediated immune responses and unique gene profiles between different stages of the disease.

This review discusses the basic biology of apoptosis and its relevance to skin diseases, without presenting new research findings.

This study found that circadian clock genes are involved in regulating the hair growth cycle, suggesting a connection between daily rhythms and the longer hair follicle cycling process.

This study found that prolactin plays a direct role in regulating the timing of hair growth cycles in mice by affecting the skin, rather than through other endocrine factors.

This study found that thrombospondin-1 plays a critical role in hair follicle cycle regulation, with deficiency prolonging follicle growth and overexpression delaying it through antiangiogenic effects.

This review discusses the role of estrogens in hair follicle cycling and the skin, highlighting the need for more research on estrogen signaling pathways and their interactions with other factors in hair biology.

This article reviews the generation of complex integument patterns through genetic, chemical, and environmental influences, with applications in tissue engineering, but reports no new experimental results.

This review discusses the role of activin signaling in hair follicle formation, hair growth cycling, and skin healing, but presents no new clinical findings.

This study found that Edar signaling plays a role in regulating the hair cycle and apoptosis in hair follicle keratinocytes during the catagen phase in mice.

In this study, synthetic vitamin D3 analogs stimulated hair growth and formation of normal hair follicles in nude mice, unlike the natural form 1,25 dihydroxyvitamin D3.