125 citations
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September 2001 in “The FASEB Journal” This study demonstrated that stress inhibited hair growth in mice, likely through substance P-dependent activation of immune cells, highlighting a brain-hair follicle connection.
9 citations
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February 2018 in “Journal of The American Academy of Dermatology” This study found that methylene blue staining helped identify late catagen and telogen hair follicles more accurately than unstained follicles, which suggests that established telogen percentage standards may be overestimated.
September 2016 in “Journal of dermatological science” This study suggests that FGF18 may enhance radioresistance in telogen hair follicles by inducing cell cycle arrest, potentially serving as a radioprotector against radiation-induced hair follicle damage.
6 citations
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November 2013 in “International Journal of Radiation Biology” In this study, γ-ray irradiation of mice reduced hair follicle density and pigmentation, suggesting damage to stem cells and progenitors for keratinocytes and melanocytes.
25 citations
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October 2018 in “PloS one” This study explored hair follicle gene expression in Inner Mongolia Cashmere goats and identified potential regulators of the transition between growth phases, including IL17RB and ZNF genes.
24 citations
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May 2022 in “BMC Veterinary Research” This study identified key mRNAs and lncRNAs, along with related pathways, that play potentially important roles in hair follicle development and cycling in cashmere goats.
November 2013 in “Institutional Repositories DataBase (IRDB)” In this study, γ-ray exposure in mice decreased hair follicle density and pigmentation, suggesting damage to stem cells affecting hair follicle regeneration.
November 2013 in “Institutional Repositories DataBase (IRDB)” In this study, γ-ray irradiation in mice during the first telogen phase led to decreased hair follicle density and pigmentation anomalies, suggesting damage to stem cells and progenitors for keratinocytes and melanocytes.
1 citations
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January 2003 in “Annals of Dermatology” This study found that hair follicles on the anterior scalp may be more vulnerable to acute telogen effluvium than those on the occipital scalp.
July 2025 in “Journal of Dermatological Treatment” This study found that platelet-rich plasma significantly improved hair growth parameters in androgenic alopecia patients and was even more effective when combined with minoxidil, particularly in reducing vellus hair.
35 citations
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February 2019 in “Cell Communication and Signaling” This study found that BMP6 and Wnt10b competitively regulate the transition between hair follicle growth phases, offering new insights into hair follicle cycling and potential hair loss treatments.
25 citations
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June 2004 in “Journal of Investigative Dermatology” This study found that macrophage-stimulating protein (MSP) enhanced hair growth in both human hair follicles cultured in vitro and in mice through the promotion of anagen phase induction.
7 citations
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August 2020 in “Genes” This study mapped gene expression in different skin structures of dogs, finding similarities to humans that support using dogs as models for human skin diseases.
2 citations
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December 2024 in “BMC Genomics” In this study, researchers used transcriptome sequencing and bioinformatics analysis to identify important genes and pathways involved in the transition between hair growth phases, offering new insights into hair follicle cycle regulation and development.
October 2024 in “Experimental Dermatology” This study examined hair follicles from 14 Caucasian males and found that catagen-phase follicles were more prevalent (7.5%) than previously reported, challenging the established view that telogen-phase follicles are more common.
April 2018 in “Journal of Investigative Dermatology” This study found that claudins CLDN1 and CLDN3 are crucial for maintaining proper hair follicle structure in mice, and their dysregulation may lead to telogen hair loss.
113 citations
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November 2017 in “Scientific Reports” This study found that treatment with mesenchymal stem cell extracellular vesicles enhanced hair growth in mice and stimulated dermal papilla cell activity and growth factor production in vitro.
13 citations
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September 2018 in “Scientific Reports” In this study, researchers found that microRNAs and specific target genes, such as MiR-195 and genes like CHP1, SMAD2, FZD6, and SIAH1, play significant roles in regulating hair follicle initiation in cashmere goats.
November 2025 in “Scientific Reports” In this study, researchers linked SARS-CoV-2 infection to telogen effluvium in some COVID-19 patients by observing the accumulation of viral proteins in hair follicle cells, which may trigger stress responses and cell death, suggesting hair follicles as a potential target in COVID-19.
This study found that Biofield Energy Healing Treatment on a herbal mixture increased hair growth and melanogenesis in mice compared to an untreated group.
19 citations
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January 2013 in “International journal of medical sciences” In this study, overexpression of Wnt5a in mice was associated with the elongation of the telogen stage and inhibition of hair growth initiation, suggesting Wnt5a's role in maintaining hair follicle quiescence.
10 citations
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October 2000 in “PubMed” This study found that transgenic mice expressing HPV E6/E7 in the outer root sheath experience continuous hair follicle cycling due to delayed catagen entrance and insensitivity to telogen resting signals.
August 2026 in “Aesthetic Plastic Surgery” In this study, hair follicle stem cell-derived exosomes enriched with miR-181a-5p accelerated hair regrowth and the transition from telogen to anagen in mice, with up to 90% hair coverage observed, suggesting enhanced activation of the Wnt/β-catenin pathway compared to controls.
April 2021 in “Current Topics in Nutraceutical Research” This study found that citron seed oil promotes hair regrowth in a C57BL/6 mouse model by enhancing the transition to the growth phase, increasing hair follicle features and skin thickness, and inducing specific protein expressions that support hair regeneration.
January 2018 in “journal of applied pharmaceutical science” Biomimetic peptides improved hair growth and increased growth factors in hair follicles for hair loss patients.
June 2017 in “Experimental and Therapeutic Medicine” In a depilated mouse model, this study found that blocking CXCL4 activity with an anti-CXCL4 monoclonal antibody promoted hair growth by inducing an earlier anagen phase, delaying hair follicle regression, and altering expression of genes and proteins related to hair growth and cell proliferation.
27 citations
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April 2020 in “PLoS ONE” In this study, RNA-Seq analysis identified 2717 genes differentially expressed between anagen and telogen hair follicle stem cells in cashmere goats, potentially involving several signaling pathways in vitro.
March 2023 in “Human Pathology” This review found that while follicular hair counts and ratios assist in diagnosing non-scarring alopecia, they should be used alongside specific morphological features for accurate diagnosis.
May 2026 in “Malaysian Journal of Medicine and Health Sciences” This study found that in a testosterone-induced androgenetic alopecia mouse model, the combination of PRP-derived small extracellular vesicles and 5% minoxidil significantly improved hair follicle density and the anagen-to-telogen ratio compared to minoxidil alone, suggesting a synergistic effect that enhances hair growth.
154 citations
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October 1996 in “Proceedings of the National Academy of Sciences of the United States of America” This study found that 17-beta-estradiol inhibits hair growth in mice by blocking hair follicles in the telogen phase, whereas an estrogen receptor antagonist promotes hair growth by initiating anagen.