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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 observed that melanogenesis in human hair follicles is linked to anagen phases, with melanocyte activity and enzyme expression being region-specific to the nascent bulb.

This review discusses advancements in laser hair removal technologies and the potential role of radiofrequency for certain hair types, but it reports no new clinical results.

This review discusses the cyclical phases of hair follicle transformation and the various factors that regulate hair growth, reporting no new clinical results.

This chapter reviews the anatomy and physiology of hair follicles but reports no new research findings or clinical results.

This review discusses fetal hair follicle development and its importance for determining in utero drug exposure through neonatal hair, but it reports no new clinical results.

Overexpression of certain genes can shorten hair by disrupting the hair-growth cycle.

This study suggests that type IV collagenases, MMP-2 and MMP-9, play important roles in the hair cycle by regulating the expression of VEGF, IGF-1, and TGF-β in mice.

This study found that heparanase is primarily located in the inner root sheath of human hair follicles during the anagen phase, and inhibiting it in cultured hair follicles induces a catagen-like process.

This study suggests that PDGFA and BMP2 play a role in the hair follicle cycle in cashmere goats, with PDGFA particularly involved in activating the growth phase.

This review discusses telogen effluvium, including its triggers, clinical presentations, and management options, and does not report new research findings, emphasizing the need for identification and exclusion of underlying causes.

In this study, human hair follicles were maintained in a serum-free medium for up to 12 days, revealing detailed histological and ultrastructural changes that suggest possible catagen-like involution mechanisms.

This study found that the 2,940 nm erbium: YAG laser may promote hair growth in C57BL/6 mice by speeding up transitions in the hair cycle and increasing hair follicle numbers.

This study found that Fgf5 mutant mice exhibited longer hair, particularly in males, likely due to a prolonged anagen phase in the hair cycle.

In this study on cultured human dermal papilla cells, researchers found that niacinamide may enhance hair growth by reducing oxidative stress-induced cell senescence and delaying catagen entry, suggesting potential applications against hair loss.

This study found that vinegar-processed black soybean and its extract accelerated hair growth and prevented alopecia in mice, with potential mechanisms involving modulation of the Wnt/β-catenin signaling pathway, suggesting they may be promising functional foods for hair regeneration.

In this study, rat vibrissa follicles transplanted into mice demonstrated survival, partial sympathetic nerve reinnervation, and increased norepinephrine levels 37 days post-implantation, suggesting potential for hair growth despite not returning to normal nerve function.

This study found that HtrA2 inactivation in mnd2 mice is associated with delayed hair cycle phases and growth retardation of adipocytes, suggesting HtrA2's role in regulating adipogenesis-related hair growth.

This study found that microRNAs play key roles in regulating gene expression during the hair cycle in mice, impacting follicle growth and skin homeostasis through mechanisms involving major signalling pathways.

This review covers the use of photobiomodulation devices for hair regrowth in various types of alopecia and reports no new clinical results.

This study found that red ginseng extract may stimulate hair growth in a mouse model by enhancing dermal papilla cell proliferation and activating skin antioxidant defenses.

This study found that platelet-rich plasma therapy increased hair density in androgenetic alopecia and improved hair regrowth in chronic plaque alopecia, with better results when combined with minoxidil rather than finasteride.

In this study, transgenic mice expressing a truncated form of latent transforming growth factor-β-binding protein exhibited altered hair cycles due to increased active transforming growth factor-β, impacting keratinocyte proliferation and hair cycle phases.

In this study, miR-31 was found to play a significant role in hair cycle regulation in mice by controlling key gene expressions involved in hair growth and differentiation.

This study found that peripheral clock genes, particularly BMAL1 and Period1, modulate human hair follicle cycling, suggesting their potential as therapeutic targets for affecting hair growth.

In this study, IGF-I was shown to enhance human hair follicle growth, maintain the anagen phase, and increase expression of certain growth factors and anti-apoptotic markers.

In this study, researchers found that Notch signaling is crucial for late-stage epidermal differentiation and postnatal hair cycle homeostasis by regulating hair follicle stem cell proliferation and differentiation.

This study found that estrogen can cause reversible suppression of the hair cycle by inducing premature catagen and maintaining the telogen phase without damaging the hair follicle stem cell niche or the signature gene expressions of dermal papilla cells.

Keratin patterns in hair follicles help understand hair growth and potential hair and nail disorders.

In this study, N-WASP deficiency in mouse skin was found to cause severe alopecia and disrupt hair follicle cycling by 5 months, highlighting its critical role in skin function and Wnt signaling.