8 citations
,
August 2014 in “Biochemical and Biophysical Research Communications” The study found that over-expressing ornithine decarboxylase in the outer root sheath of the hair follicle in mice increases UVB-induced tumor growth and invasive squamous cell carcinoma compared to inter-follicular epidermal keratinocytes.
57 citations
,
November 2011 in “The Journal of Dermatology” This study found that transplanting human hair follicle pluripotent stem cells can promote the recovery of sciatic nerve function in a mouse model of nerve impingement.
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.
April 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” According to this study, human scalp hair follicles containing pluripotent stem cells demonstrated the ability to differentiate into cardiac muscle cells and other cell types, suggesting potential applications in heart and nerve regeneration.
April 2017 in “Journal of dermatological science” This study reported that human hair follicles containing pluripotent stem cells can differentiate into cardiac muscle and other cells, indicating their potential for future clinical applications in heart and nerve regeneration.
419 citations
,
March 2005 in “Proceedings of the National Academy of Sciences” This study demonstrated that ND-GFP stem cells from the hair-follicle bulge area can differentiate into various cell types, including neurons, suggesting their potential as a source for therapeutic applications.
40 citations
,
July 2015 in “Journal of Cellular Biochemistry” This study found that cysteine supplementation significantly increases keratin expression in human keratinocytes, and counteracts the negative impact of iron deficiency on keratin production by enhancing iron availability for cellular processes.
6 citations
,
March 2011 in “European Journal of Dermatology” This study observed that nestin-positive, K15-negative cells in hair follicles may play a crucial role in hair follicle regeneration in patients with alopecia areata.
12 citations
,
January 2014 in “Cell structure and function” This study suggests that specific combinations of human type I and II hair keratins, particularly K35-K85 and K36-K81, have distinct in vitro assembly properties that are significant for macrofibril formation.
144 citations
,
June 2008 in “Cell Cycle” This study found that in mice, transplanting hair follicle stem cells promoted recovery from spinal cord injury, as these cells largely differentiated into Schwann cells aiding nerve repair.
13 citations
,
April 2016 in “Journal of Visualized Experiments” This study describes a method for isolating stem cells and keratinocytes from mouse hair follicles using FACS technology, facilitating the study of stem cell biology.
133 citations
,
March 1999 in “Journal of Cutaneous Pathology” This study found that keratin 15 expression in trichoepitheliomas and some basal cell carcinomas suggests a link to hair follicle stem cells in the bulge.
47 citations
,
August 2012 in “Cell Cycle” This study found that multipotent, nestin-expressing stem cells from the upper part of hair follicles can proliferate significantly and differentiate into various cell types, showing potential for nerve and spinal cord repair.
January 2012 in “Durham e-Theses (Durham University)” This study found that knock-down of keratin 15 in various cell lines affected cell spreading, morphology, migration, differentiation, and proliferation, suggesting its role in maintaining the stem cell nature of keratinocytes.
30 citations
,
March 2019 in “Archives animal breeding/Archiv für Tierzucht” In this study, variation in the KRTAP15-1 gene in goats was linked to changes in cashmere fibre diameter, with specific variants showing dominant or recessive effects.
387 citations
,
November 2003 in “Journal of Investigative Dermatology” The K15 promoter effectively targets stem cells in the hair follicle bulge.
85 citations
,
September 2013 in “International Journal of Molecular Sciences” This review evaluates existing research on Keratin 15 to assess its validity as a marker for epidermal stem cells, reporting no new results.
42 citations
,
July 2010 in “European Journal of Cell Biology” This study found that thyroid hormones T3 and T4 enhance keratin 15 promoter activity and stimulate CD200 expression in epithelial stem cells from human scalp hair follicles, affecting their growth and differentiation.
December 2025 in “The Journal of Cell Biology” This study found that keratin 15 lacks the ability to sequester YAP1 in keratinocytes effectively, unlike keratin 14, and suggests that a higher K15:K14 ratio may promote a progenitor state and inhibit differentiation in epidermal keratinocytes.
90 citations
,
February 2001 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that interleukin-1 directly induces the expression of keratin 6 in keratinocytes, which is a marker of activation and involved in inflammatory skin responses.
53 citations
,
July 2011 in “Biomaterials” This study observed that hepatocyte adhesion to human hair keratin biomaterials was mediated by the hepatic ASGPR, as blocking this receptor reduced cell attachment.
51 citations
,
January 2007 in “The journal of investigative dermatology/Journal of investigative dermatology” This study identified a novel keratin-associated protein, KAP24.1, which is specifically expressed in the human scalp and located in the hair cuticle.
28 citations
,
February 2012 in “PLoS ONE” In this study, researchers identified a novel congenital skin disorder in Chesapeake Bay retrievers, linked to a plakophilin-1 deficiency due to a genetic mutation, marking the first known occurrence in an animal species.
37 citations
,
January 2009 in “The Journal of Dermatology” In this study, hair follicle stem cells from ND-GFP transgenic mice were observed to be pluripotent, effectively repairing peripheral nerve and spinal cord injuries in mouse models.
1 citations
,
January 2008 in “Springer eBooks” This study found that hair follicle stem cells are multipotent and can enhance nerve regeneration and function in mice, showing potential as an accessible source for treating peripheral nerve injuries.
8 citations
,
April 2009 in “International journal of oncology” This study found that bulge-derived keratinocytes from human follicles were more resistant to differentiation compared to epidermal keratinocytes, possibly due to WIF-1 involvement.
106 citations
,
March 2014 in “BioEssays” This review examines current knowledge on human epithelial hair follicle stem cells, their markers, and outlines challenges in translating findings from murine studies to human research, but does not report new experimental results.
36 citations
,
September 2013 in “PLoS ONE” This study found that sweat gland stem cells primarily maintain sweat gland homeostasis but can trans-differentiate to aid in epidermal healing and regenerate diverse skin structures under certain conditions.
26 citations
,
July 2012 in “Biochimica et Biophysica Acta (BBA) - General Subjects” This review discusses the identification and roles of different epidermal stem cell types in skin homeostasis and repair, and reports no new experimental findings.
9 citations
,
April 2019 in “Molecules” This study found that a blackcurrant extract with phytoestrogen activity increased hair number and stem cell marker expression in a menopausal rat model, suggesting a potential benefit for hair loss.