December 2025 in “FEBS Open Bio” In this study, fibroblasts from long-term skin biopsy cultures retained their ability to reprogram into induced pluripotent stem cells after 16 months, despite undergoing transcriptional changes and decreased proliferation rates over successive generations.
182 citations
,
May 2003 in “Development” This study found that Myc activation in mouse epidermis impairs keratinocyte adhesion and motility by downregulating extracellular matrix and cytoskeleton proteins, affecting hair lineage differentiation.
132 citations
,
September 2009 in “Experimental Dermatology” This study introduced a new classification system for distinguishing between anagen VI and early catagen stages in human hair follicle organ culture, using it to confirm eflornithine's ability to induce premature catagen.
130 citations
,
February 2005 in “Proceedings of the National Academy of Sciences” This study found that differentiated cells of the corneal epithelium can be converted to hair and interfollicular epidermis through a multistep process involving dermal developmental signals.
61 citations
,
July 2011 in “PLOS ONE” This study provides the first direct evidence that spermidine can stimulate hair growth and modulate human epithelial stem cell biology in cultured human hair follicles.
14 citations
,
February 2022 in “The Journal of clinical investigation/The journal of clinical investigation” This study found that the development of Merkel cell carcinoma from hair follicles in mice can be driven by in vivo reprogramming with ATOH1 and relies on p53 loss for progression.
8 citations
,
April 2016 in “Experimental dermatology” This study found that the immune-competent B6. Cg‐Tyr c−2J Hr hr /J congenic mouse line had a more pronounced delayed sunburn response and different proliferative skin reactions to UV exposure compared to SKH 1 mice.
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.
May 2026 in “Nature Communications” This study observed that the loss of H3K9me3, via the ablation of Suv39h1, Suv39h2, and Setdb1 in embryonic mouse epidermis, disrupts skin development processes such as keratinocyte differentiation and hair follicle formation, highlighting H3K9me3's crucial role in epidermal morphogenesis.
October 2025 in “Phytomedicine” This study demonstrates that Bazi Bushen capsules may have therapeutic potential against skin photoaging in mice by enhancing NRF2 expression and targeting the KEAP1-NRF2 pathway.
February 2025 in “Journal of Nanobiotechnology” This study developed a microneedle system using black phosphorus nanosheets and baicalin for treating androgenetic alopecia, finding it effectively enhanced drug penetration and follicular targeting while showing synergistic efficacy and safety in preclinical tests, including in vivo model efficacy against testosterone-induced hair loss.
August 2024 in “International Journal of Pharmaceutics” This study found that a specially designed water-in-oil microemulsion containing Panax notoginseng saponins improved hair density and other hair health indicators in mice with telogen effluvium and androgenetic alopecia, offering a promising multi-mechanism strategy for alopecia treatment with potentially fewer side effects than traditional methods.
May 2024 in “Cell proliferation” This study found that melatonin supplementation significantly promoted hair regeneration in a hair depilation mouse model by up-regulating the Wnt/β-catenin signaling pathway in dermal papillae and hair follicle stem cells, suggesting potential implications for human hair loss treatments.
November 2023 in “The journal of investigative dermatology/Journal of investigative dermatology” This study highlighted the significance of integrating single-cell RNA sequencing with spatial transcriptomics for improving cell-type identification in human skin, emphasizing the need for a comprehensive cell atlas.
December 2021 in “Pathologica” This case report describes a rare instance of trichogerminoma with unusually numerous mitotic figures and a higher Ki67 proliferative rate, distinguishing it from previously documented cases.
166 citations
,
September 2011 in “The Journal of Cell Biology” This study found that the p63 transcription factor plays a role in epidermal morphogenesis by regulating Satb1 expression, impacting chromatin architecture and gene expression in epidermal progenitor cells.
116 citations
,
April 2020 in “Stem Cell Research & Therapy” This study identified highly variable genes in mesenchymal stem/stromal cells that are linked to classic functions like development and inflammation response, suggesting their potential as markers for further potency studies.
90 citations
,
December 2008 in “Journal of Investigative Dermatology” Thyroid-stimulating hormone affects hair follicles but doesn't change hair growth or color.
7 citations
,
July 2011 in “Archives of Dermatology” This study reports a case where a 13-year-old boy's hair texture changed to resemble his early childhood hair after regrowth from alopecia areata, with potential causes remaining uncertain.
3 citations
,
November 2022 in “International journal of molecular sciences” This study reported that bio-pulsed avian-derived mesenchymal stem cell extracellular vesicles significantly improved cell proliferation, wound healing, and gene expression in human skin fibroblasts and hair follicle cells.
2 citations
,
May 2024 in “International Journal of Molecular Sciences” This study found that in a mouse model of psoriasis, depleting CD169+ macrophages led to milder symptoms and decreased inflammation, suggesting these macrophages play a crucial role in psoriasis development.
In this study, researchers used two dermal papilla spheroid models to investigate hair cycle regression mechanisms and found that the vascular system enhances tissue physiology and gene modulation, while Retinol-based treatments can partially recover tissue degeneration observed over an extended culture period.
February 2023 in “Materials today bio” In this study, researchers developed a promising transdermal agent using Triton X-100-modified polyethyleneimine that successfully delivered genetic material to hair follicle cells in mice, potentially alleviating hair loss due to androgenetic alopecia by promoting cell proliferation and inhibiting apoptosis.
6 citations
,
December 2017 in “Molecular Medicine Reports” This study found that Wnt5a expression may suppress cell differentiation and induce an inflammatory response in HaCaT keratinocytes, which could be relevant to psoriasis development.
November 2024 in “Aging Cell” In this study, researchers found that treating senescent human dermal papilla cells with dasatinib and quercetin improved their ability to regenerate hair follicles by depleting senescent cells and enhancing inductive potency, suggesting potential clinical applications for senolytic treatments in cell-based hair restoration therapies.
September 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” In this study, the reconstructed skin epidermal model derived from hair follicles showed gene expression and enzyme functionality consistent with native human skin, suggesting its viability for studying skin metabolism and potential toxicity of dermo-cosmetic ingredients.
14 citations
,
January 2021 in “Stem cell research & therapy” This study suggests that interfollicular epidermal keratinocytes with stem-like features may serve as an alternative to follicular keratinocytes for hair regeneration by supporting hair follicle morphogenesis in vivo.
13 citations
,
June 2018 in “Journal of histochemistry and cytochemistry/The journal of histochemistry and cytochemistry” This study found that the expression of laminin-511 and -332 was significantly increased in psoriasis skin lesions and may influence keratinocyte proliferation and apoptosis, suggesting a previously overlooked role in the disease's pathogenesis.
1 citations
,
September 2023 in “eLife” This study found that TLR2 expression in hair follicle stem cells is crucial for hair follicle maintenance and regeneration, with TLR2-dependent activation potentially offering new therapeutic approaches for hair loss prevention through mechanisms involving immune pathways and CEP administration.
May 2025 in “Frontiers in Bioengineering and Biotechnology” In this study, the researchers reported that a novel exosome-based treatment, EX104, effectively reversed hair follicle miniaturization and promoted hair growth in a mouse model of androgenetic alopecia, showing results comparable to minoxidil and surpassing it in stimulating capillary growth and follicular proliferation.