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This study reported that etretinate treatment leads to increased hair shedding due to a sustained decrease in anagen duration, with an arrest at the onset of anagen and a follicular anchorage defect in telogen contributing to alopecia.

Tocilizumab treatment was associated with significant hair regrowth in one patient and temporary hair loss followed by regrowth in another.

The connective tissue around hair follicles changes structure throughout the hair cycle.

In this study, researchers observed that in nude mice, exogenous stimulations lengthened the hair-existing phase and shortened the no-hair phase, with minoxidil influencing male and female mice differently.

In this study, changes in hair cycle phases during pregnancy and the post-partum period showed a rise in telogen rates after delivery, especially among non-breastfeeding women, but no drastic exaggerations were noted.

In this study using C57BL/6N mice, the researchers found that skin thickness, mast cell counts, and immunoreactive density of certain cytokines increased at various stages of hair follicle growth following depilation.

This study suggests that D2O increases hair length in nude mice by extending the hair cycle duration, particularly the hair-existing phase, which is associated with increased mast cell density.

This review discusses the development, regulation, and aging of the human hair follicle pigmentary system and suggests potential for reversing hair graying by manipulating follicle melanocytes in vitro, but reports no clinical results.

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.

In this study, researchers found that changes in the extracellular matrix components, particularly fibronectin, laminin, and type IV collagen, during the rat vibrissa follicle growth cycle, suggest dynamic remodeling related to dermal-epidermal signaling.

In this study, human hair follicles showed varying expression of cholesterol transport proteins during the hair cycle, suggesting a potential role of cholesterol in hair growth and cycling.

In this study, researchers developed non-invasive methods to monitor hair shaft, melanin, and collagen dynamics in C57BL/6 mice across different hair follicle cycle phases, supporting non-invasive research in hair loss treatment development.

In this study, researchers using a multi-omics approach identified specific proteins involved in the hair follicle cycle of Inner Mongolia Cashmere Goats, finding that API5 affects apoptosis, while ribosomal proteins are highly expressed during the resting stage, providing insights into hair follicle growth and apoptosis.

This study found that VEGF growth factor plays a significant role in the development of androgenetic alopecia and telogen hair loss in women, more so than KGF, TGF-01, or EGF.

The researchers reported that mast cell and nerve fiber interactions in mouse skin are highly selective for nerve fiber types and vary depending on the hair cycle phase.

This study reported that HSP27 protein shows varied expression in human scalp hair follicles across anagen, catagen, and telogen stages, suggesting a role in hair follicle biology.

This study found that the angora mouse mutation prolongs the anagen phase, resulting in excessively long hair and follicular abnormalities, without involving circulating hair cycle factors.

This study found that transthyretin and megalin expression in human scalp hair follicles varies significantly with the hair growth cycle, peaking during anagen and diminishing in catagen and telogen phases.

In this study, researchers identified key lncRNAs and target genes potentially involved in the transformation of the hair follicle cycle, which could advance understanding of lncRNAs' roles in hair follicle development.

Fibronectin and other basement membrane components increase during hair growth and decrease during rest.

This study observed that enzyme activity influencing estradiol-to-estrone conversion in Wistar rat skin varied with the hair cycle in dorsal skin but was minimal in plantar skin.

This study found that a high dose of epidermal growth factor induced hair loss in sheep by causing apoptosis in anagen hair and transitioning the hair cycle to catagen.

This study suggests that diffuse alopecia areata initially involves an intense inflammatory attack during the anagen phase, progressing through different hair cycle stages with specific shedding patterns.

This study suggests that different melanocyte subpopulations in hair follicles have varying patterns of apoptosis and survival during the catagen phase, which may inform models for modulating melanocyte behavior in vivo.

This study observed dynamic changes in CD10 and CD34 expression in fetal and adult human hair follicles during embryogenesis and hair cycling.

This study found that laser hair removal results in females were not influenced by hormonal fluctuations during different menstrual cycle phases, although pain tolerance was slightly lower during menstruation without reaching statistical significance.

This study investigated adenosine-to-inosine RNA editing in the hair follicle cycle of Tianzhu white yak, identifying numerous editing sites and suggesting their involvement in pathways related to hair growth.

In this study, the researchers identified key genes, including KAP and KRTAP, that correlate with the secondary hair follicle growth cycle in Inner Mongolian cashmere goats, emphasizing March as the significant transition month.

This study found that VEGF expression and microvessel density in hair follicles of Liaoning cashmere goats follow a bimodal pattern correlated with hair development throughout the year.