36 citations
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July 2004 in “Journal of Controlled Release” This study demonstrates that confocal laser scanning microscopy can effectively visualize the rapid diffusion and penetration pathway of a dye into the hair follicle in fresh human scalp skin.
31 citations
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August 2021 in “Stem Cell Research & Therapy” This review examines the life cycle, biomarkers, and functions of hair follicle stem cells, emphasizing their role in hair loss therapy and other skin and hair disorders, but reports no new clinical results.
140 citations
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December 1998 in “Journal of Investigative Dermatology” Apoptosis in hair follicles varies by growth phase, with TGF-β possibly starting the catagen phase.
5 citations
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January 2005 in “PubMed” In this study, researchers observed that apoptosis occurs in both growing and regressing hair follicles in dogs, indicating a spatio-temporal relationship with the hair cycle.
April 2023 in “Journal of Investigative Dermatology” This study found that blocking apoptosis during the catagen phase in mice disrupts hair follicle stem cell niche architecture, delaying subsequent hair regeneration cycles.
This study observed two distinct groups of alopecia areata lesions based on PD-1 expression in T cells from biopsied skin samples, suggesting potential differences in subtypes or stages of the disease that warrant further investigation.
April 2023 in “Journal of Investigative Dermatology” This study found that in biopsied skin samples of alopecia areata, a lower anagen/telogen ratio was associated with increased T cell infiltration, and enhancing the PD-1/PD-L1 axis may inhibit CD8+T cell infiltration and improve the condition.
12 citations
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June 2019 in “The journal of pharmacology and experimental therapeutics/The Journal of pharmacology and experimental therapeutics” This study found that inhibiting the TRPV3 channel may significantly promote hair growth and suggests a potential therapeutic approach for hair loss and related skin diseases.
2 citations
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April 2019 in “Journal of Investigative Dermatology” This study found that overexpression of Gasdermin A3 in mice disrupts the hair follicle stem cell niche and causes hair loss through cell necrosis and abnormal hair cycle progression, without involving immune-mediated mechanisms.
October 2023 in “Oncotarget” In this study using live mice, researchers observed that during hair follicle regression, apoptosis in basal cells may propagate by triggering neighboring cells, potentially regulated by a gradient of pro-survival signals from stem cells, and proposed a testable mechanism to further explore this process.
November 2020 in “bioRxiv (Cold Spring Harbor Laboratory)” This study in live mice suggests that hair follicle regression involves apoptosis propagation towards stem cells, potentially slowed by a protective signal from the stem cells themselves.
This study found that inhibiting apoptosis during hair follicle regression in mice disrupted hair regeneration, causing delays and alterations in stem cell niche architecture and associated tissue remodeling processes.
1 citations
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September 2023 in “Life science alliance” In this study, researchers observed that Vdr-knockout mice experience hair cycle arrest during the catagen stage, leading to alopecia, with persistent epithelial strands forming in the hair follicles, indicating Vitamin D receptor's role in regulating hair follicle regression and regeneration.
12 citations
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December 2019 in “International Journal of Molecular Medicine” This study found that human umbilical cord blood-derived mesenchymal stem cells (hUCB-MSCs) significantly prevented hair loss induced by dexamethasone in a mouse model and enhanced cell proliferation in human hair follicle cells, suggesting a protective effect against stress-related hair loss.
In this study, researchers explored how hypoxic preconditioning affects the survival and oxidative stress resilience of nestin-expressing hair follicle stem cells and SH-SY5Y neuroblastoma cells, focusing on changes in gene expression for HIF1α, BDNF, and VEGF.
9 citations
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August 2018 in “Biomedical dermatology” This study found that topical administration of the TGFβ mimetic peptide DPS-1 stimulated hair growth in mice by promoting HDP cell proliferation and enhancing hair follicle morphology.
August 2022 in “International Journal of Molecular Sciences” This study found that lncRNA2919 negatively impacts hair follicle regeneration by decreasing follicle depth and density in a rabbit model, suggesting a regulatory role in the hair follicle cycle through DNA methylation.
In this study, researchers developed vegan exosome-like vesicles from microalgae that mimic mammalian exosomes, demonstrating promising in vitro, ex vivo, and clinical effects such as improved wrinkle depth and elasticity, making them a potential alternative in cosmetic applications.
September 2024 in “Journal of Inflammation Research” Results are not reported in this abstract, which outlines research investigating why diabetic mice experience suppressed hair follicle stem cell activation, potentially contributing to chronic diabetic wounds.
May 2021 in “Journal of Dermatology and Cosmetic” This study found that using low-power lasers on cryosurgery-induced wounds in rats can prevent hair follicle necrosis and increase hair follicle numbers, with the experimental group showing significantly more hair follicles than the control group across all time points studied.
1 citations
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December 2023 in “Biomolecules” This review highlights the importance of apoptosis in the hair cycle, particularly its role in hair follicle regression and loss, suggesting that understanding its mechanisms can aid in developing treatments to reduce hair loss and promote hair growth.
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.
165 citations
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December 2004 in “Differentiation” This review discusses the critical role of BMP signaling in the development and regulation of skin and hair follicles and notes that further research could aid therapeutic advances; it presents no new clinical results.
53 citations
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September 2013 in “Journal of Investigative Dermatology” This study suggests that cultured hair follicle dermal sheath cup cells exhibit immune privilege properties, partly through the expression of PD-L1, which impacts co-cultured immune cells' behavior.
43 citations
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December 2006 in “The American journal of pathology” 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.
19 citations
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January 2020 in “Journal of Biophotonics” This study found that using a PEG-400/oleic acid mixture as an optical clearing agent enhanced the detection depth of particles in skin without causing dehydration, based on tests in rats and further testing in vivo.
18 citations
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November 2020 in “Frontiers in Cell and Developmental Biology” This review discusses how inflammation influences hair follicle stem cell activities like wound healing and follicle cycling and suggests a potential link between inflammation, stem cell activation, and programmed cell death.
17 citations
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July 2019 in “Lupus Science & Medicine” In this study, gene expression analysis of plucked hair follicles from scalp lesions was sufficient to differentiate chronic discoid lupus erythematosus from psoriasis and healthy controls, suggesting a non-invasive diagnostic potential.
10 citations
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January 2004 in “Dermatologic Surgery” This study found that storing hair follicle micrografts in HEPES-buffered DMEM with ACD inhibitors like aminoguanidine significantly increased hair shaft elongation compared to phosphate-buffered salt solution, suggesting improved viability for transplantation.
In this study, exposure to high concentrations of all-trans retinoic acid caused apoptotic cell death in mouse hair follicle stem cells, suggesting its potential for removing unwanted hair.