121 citations
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May 2009 in “Journal of Ethnopharmacology” This study found that the methanol extract of Eclipta alba showed dose-dependent hair growth promoting activity in pigmented C57/BL6 mice by influencing the transition from the telogen to anagen phase.
169 citations
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May 2006 in “Genes & Development” This study found that keratin 17 and TNFα play interdependent roles in regulating hair follicle cycling, with TNFα required for the anagen–catagen transition and its ablation partially rescuing hair cycling defects in K17-null mice.
161 citations
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June 1994 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that the switch-off of melanogenesis during the hair cycle in C57 BL-6 mice is a gradual and stochastic process starting in mid anagen VI, with specific biochemical markers indicating the transition to catagen.
71 citations
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February 2000 in “Endocrinology and metabolism/American journal of physiology: endocrinology and metabolism” This study found that topical estradiol inhibits hair growth in mice by preventing the hair follicle's transition from resting to growth phase, a process reversible with an estrogen receptor antagonist.
68 citations
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April 2012 in “Journal of Investigative Dermatology” The study reports that Fgf18 and Tgf-β2 signaling pathways in hair follicle stem cells have opposing effects on the timing of hair cycle transitions, influencing the shift from telogen to anagen phases.
39 citations
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April 2010 in “International Journal of Pharmaceutics” This study found that using monoolein cubic phase nanoparticles with an entrapped hydroxypropyl β-cyclodextrin/minoxidil complex increased minoxidil skin permeation, but minoxidil retention in the skin was higher with a traditional solution.
32 citations
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April 2016 in “Journal of Investigative Dermatology” This study found that STAT5 activation in the dermal papilla acts as a key switch to trigger anagen entry in postdevelopmental hair follicle cycling.
22 citations
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October 2020 in “Frontiers in Cell and Developmental Biology” This study found that resveratrol and fisetin promoted hair growth in mice by inducing telomerase reverse transcriptase expression, which activates hair follicle stem cells and transitions follicles from a resting to a growth phase.
17 citations
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April 2016 in “Journal of Investigative Dermatology” This study found that the synthetic thyroid hormone receptor modulator KB2115 significantly prolonged the growth phase of human hair follicles in culture without altering mitochondrial activity, suggesting potential as a safer hair loss treatment compared to traditional thyroid hormones.
10 citations
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February 2019 in “Journal of cellular physiology” This study found that in yak hair follicles, TGF-β2 significantly contributes to the transition from growth to regression phases via inducing apoptosis, whereas HSP70 appears to inhibit follicle regression by protecting epithelial cells from apoptosis.
7 citations
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May 2018 in “Indian Journal of Pharmacology” This study found that the methanolic extract of Carthamus caeruleus roots significantly reduced inflammation, promoted wound healing, and enhanced hair growth in experimental models, supporting its traditional use in Northern Algeria as a skincare remedy.
2 citations
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August 2020 in “Natural Product Communications” This study found that the topical application of a mixture of Platycladus orientalis leaf extract and α-terpineol promoted hair growth in mice by inducing early anagen transition and increasing growth factor expressions.
February 2026 in “Brazilian Journal of Implantology and Health Sciences” This integrative literature review revealed that chronic stress, characterized by elevated cortisol levels, negatively impacts hair follicle integrity and contributes to alopecia by promoting the premature transition from the growth phase to the resting phase of the hair cycle.
December 2025 in “Ciencia Latina Revista Científica Multidisciplinar” In this systematic review, researchers found that nanotopical systems like nanoparticles and liposomes significantly improved hair density, thickness, and follicular regeneration markers in alopecia treatment, sometimes surpassing traditional therapies like topical minoxidil, though methodological limitations remain such as insufficient long-term clinical trials.
April 2024 in “Cellular signalling” This study on mice found that activating TRPML channels with MLSA1 promoted hair regeneration, accelerated hair cycle transition, and influenced human dermal papilla cells to secrete hair growth promoting factors while reducing hair growth inhibitors and oxidative damage.
April 2024 in “Biomedicine & pharmacotherapy” This study observed that pilose antler extract promoted hair growth in mice with androgenetic alopecia by stimulating the hair follicle growth cycle via the SHH/GLI pathway activation and BMP/Smad pathway suppression.
This study discusses a potential new treatment called AMPLEX PLUS that may significantly slow hair loss and stimulate new hair growth by influencing the transition of hair follicles from the telogen phase to the active anagen phase.
November 2023 in “Journal of Drug Delivery Science and Technology” This article reviews the potential of stem cell-derived exosomes as a therapeutic approach for androgenic alopecia, noting their advantages over traditional cell therapy in repairing and regenerating hair follicles to address hair loss.
This study identified specific lncRNAs and mRNAs differentially expressed in miniaturized follicles compared to normal follicles in patients with androgenetic alopecia, with AL136131.3 potentially inhibiting hair growth and accelerating follicle transition to catagen through effects on glycolysis-related genes.
October 2022 in “Hair Transplantation” This study reviewed preliminary evidence suggesting platelet-rich plasma could play a significant role in hair restoration, with animal experiments showing faster hair cycle transitions compared to controls.
December 2020 in “Èffektivnaâ farmakoterapiâ” In this study, researchers observed that a new peptide complex helped increase hair density in postmenopausal patients with female-type hair loss by promoting the transition of hair follicles from a resting stage to a growth stage.
May 2019 in “Journal of Drug Delivery and Therapeutics” In this study, a petroleum ether extract of Hemidesmus indicus seeds demonstrated hair growth-promoting effects in animal models, comparable to 2% minoxidil, by increasing the transition of hair follicles from telogen to anagen phase.
April 2012 in “Cancer Research” In this study, mouse models with EGFR deficiency showed that disrupted hair follicle cycling leads to increased mast cell numbers and inflammation, suggesting EGFR's role in managing hair cycle transitions and preventing folliculitis.
February 2024 in “Current Medicinal Chemistry” In this study, minoxidil nanoparticles significantly increased hair growth rate in C57BL/6 mice compared to traditional minoxidil, suggesting enhanced effectiveness and potential as a new formulation.
7 citations
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January 2019 in “Pharmaceutical Biology” This study suggests that Eclipta prostrata may promote hair growth in mice and human dermal papilla cells through regulating FGF-7 and mTOR signaling.
8 citations
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October 2022 in “Medicina-lithuania” This study observed that long COVID symptoms differed between patients infected in the Delta and Omicron periods, with those in the Omicron period experiencing milder illnesses but more fatigue, insomnia, and cough.
In this study, researchers explored the heterogeneity of pigment cells in the human scalp anagen hair follicle bulb and discovered unexpected subpopulations of melanocytes, including immature SOX10-negative cells, highlighting potential non-melanogenic roles or transitional migratory functions that require further investigation.
14 citations
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January 2017 in “Pharmacological Reports” TP0427736 may help treat hair loss by blocking a specific protein and promoting hair growth.
52 citations
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May 2015 in “PLOS Genetics” This study found that the microRNA miR-22 is a key regulator of the hair cycle, influencing hair loss by promoting the transition from growth to rest phases and repressing keratinocyte differentiation.
21 citations
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November 2011 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that telogen, a resting phase of the hair follicle cycle, is characterized by dynamic gene expression, including enhanced cholesterol metabolism and immune signaling, suggesting it is an active regulatory phase despite its quiescent appearance.