18 citations
,
January 1994 in “Skin Pharmacology and Physiology” This study observed that in vitro cocultures of hair follicle cells with dermal fibroblasts or hair papilla cells enhanced proliferation and differentiation of outer root sheath cells but did not mimic hair-type differentiation.
18 citations
,
January 2019 in “Experimental Dermatology” This study suggests that damaged anagen hair follicles have the capability to repair themselves and resume growth by mobilizing extra-bulge epithelial cells, particularly after injuries like chemotherapy and radiotherapy.
17 citations
,
February 2015 in “International Journal of Molecular Sciences” This study found that keratinocyte stem/progenitor cell-conditioned medium significantly enhanced hair growth in mice and increased the proliferation of human hair follicle cells.
14 citations
,
September 2018 in “Biochemical and Biophysical Research Communications” This study suggests that co-culturing human outer root sheath cells with human dermal papilla cells can restore their ability to induce hair growth by altering gene expression through paracrine signaling.
12 citations
,
September 1990 in “The Anatomical Record” This study found that distinct glycoconjugate expression patterns in human hair follicle cells suggest complex carbohydrate metabolism, revealing a unique sugar moiety in outer root sheath cells not present in other keratinocytes.
9 citations
,
June 2020 in “BMC Molecular and Cell Biology” This study found that stress hormones, particularly CRF, can inhibit hair growth and induce hair loss by affecting human dermal papilla cells and hair follicles, suggesting a functional HPA axis in these cells.
6 citations
,
July 2022 in “World journal of stem cells” This study found that human mesenchymal stem cell-derived extracellular vesicles promote the proliferation and migration of hair follicle cells and increase hair shaft elongation in cultured human hair follicles.
5 citations
,
October 2022 in “Cosmetics” This article reviews in-vitro and cell-free methods for assessing the efficacy of herbal ingredients in cosmetic formulations for skin health and hair growth, but it reports no new clinical results.
4 citations
,
June 2022 in “Journal of Cosmetic Dermatology” This study suggests that dermal fibroblast-conditioned medium containing multi-peptide factors may stimulate hair growth by enhancing growth factor expression and β-catenin regulation in hair follicle cells.
4 citations
,
July 2006 in “British journal of dermatology/British journal of dermatology, Supplement” This study found that testosterone significantly stimulated the proliferation of outer root sheath cells when co-cultured with beard or axillary dermal papilla cells, but not with cells from occipital scalp hair follicles.
2 citations
,
January 2020 in “BioMed Research International” This study found that Phaeodactylum tricornutum extract enhanced hair follicle cell proliferation, indicated by increased keratin and ERK1/2 signaling, suggesting its potential for hair care applications.
1 citations
,
January 2020 in “Seoul National University Open Repository (Seoul National University)” This study found that a phosphodiesterase 3 inhibitor promoted hair growth in human dermal papilla cells and stimulated anagen induction in mice, suggesting potential as a treatment for alopecia.
1 citations
,
July 2009 in “Journal of dermatology” This case report describes a 29-year-old Japanese man with follicular mucinosis, suggesting nestin-positive, multipotent hair follicle stem cells may be involved in reticular epithelial degeneration of the outer root sheath.
1 citations
,
January 2009 in “Journal of Dermatology and Venereology” This study found that cells from the upper hair follicle exhibited more active growth compared to other segments in vitro, suggesting their potential as a source of hair follicle stem cells.
June 2026 in “Frontiers in Cell and Developmental Biology” In this study, researchers used single-cell RNA sequencing to map the hair follicle microenvironment in fine-wool sheep, identifying specific cell types and gene expressions that influence wool fiber diameter, with dermal papilla cells playing a significant role in hair follicle development.
July 2024 in “Frontiers in Pharmacology” This study suggests that pilose antler extracts promote hair regrowth in androgenetic alopecia mice by activating the AKT and Wnt pathways, enhancing hair follicle stem cell proliferation.
February 2024 in “Journal of Dermatological Science” This study examined the formation of acquired curved hair and found that the fusion of hair matrix cells during follicle regeneration contributes to asymmetric follicle shapes and curved hair, potentially linked to changes in type IV collagen and protein expression levels.
January 2024 in “Biological & pharmaceutical bulletin” In this study, Panax ginseng extract and its ginsenosides were found to stimulate the proliferation of hair-related cells and promote the transition from the telogen to the anagen phase, enhancing hair-shaft growth by suppressing BMP4 expression in human dermal papilla cells.
This research reports that after genotoxic stress from ionizing radiation or chemotherapy, hair follicles can utilize progenitor cells from transit-amplifying compartments, not quiescent stem cells, for repair, suggesting a potential therapeutic approach to prevent therapy-induced hair loss by activating these progenitors.
This study suggests that targeting the activation of transit-amplifying cell-derived progenitor cells may help prevent hair loss from chemotherapy and radiotherapy by promoting hair follicle regeneration.
In this study, various cellular responses and signaling pathways were examined in hair follicles after exposure to ionizing radiation, including the effects of Wnt3a treatment, with findings noted in apoptosis, DNA damage, and differentiation processes.
Results are not reported in this study, which investigated the effects of radiation on hair follicles and evaluated various cellular responses and signaling pathways, particularly focusing on WNT signaling and the impact of Wnt3a treatment.
June 2014 in “Biotechnology and Bioprocess Engineering” This study demonstrated that injecting reconstructed dermal papilla-like tissues in mice led to new hair growth, suggesting potential future applications in hair transplantation and baldness treatment.
This study found that selective adhesion to type IV collagen successfully enriched human hair follicle stem cells based on distinct adhesion properties and marker expressions.
March 1995 in “The Journal of Dermatology” This study found that cultured hair apparatus cells initially showed low keratin antibody reactivity, which increased by day 6 as cells differentiated and corresponded with electron microscopic observations.
September 2007 in “PubMed” This study observed that subcutaneously implanted mixtures of human hair follicle cells in nude mice resulted in the formation of hair follicle-like structures, suggesting potential for hair regeneration.
January 2022 in “Biomedical Reports” This study suggests that inaudible sound at 30 kHz may promote hair growth and inhibit hair loss signals in human dermal papilla cells, indicating potential as a new treatment for androgenic alopecia.
33 citations
,
March 2015 in “Experimental Dermatology” In this study, LHX2 and SOX9 were found to mark distinct epithelial progenitor cell populations within human hair follicles, suggesting roles in maintaining the hair follicle epithelium.
88 citations
,
July 2019 in “International Journal of Molecular Sciences” In this study of patients with Androgenic Alopecia, micro-grafts containing HD-AFSCs resulted in significantly improved hair density and follicle count over 11 months compared to a saline solution, suggesting a potential alternative therapy for hair regrowth.
29 citations
,
December 2005 in “BioEssays” This study found that Wnt/β‐catenin signaling influences the hair follicle regeneration process by prompting quiescent stem cells to enter the cell cycle and is necessary for maintaining the stem cell pool.