10 citations
,
July 2022 in “The journal of investigative dermatology/Journal of investigative dermatology” This study revealed that BMP5 in onychofibroblasts may play a key role in the differentiation of nail matrix keratinocytes, highlighting transcriptional similarities between nail and hair structures.
187 citations
,
May 1988 in “Differentiation” This study found that trichocytic cytokeratins, typically found in hair, are also present in nails, filiform papillae of the tongue, and the epithelial reticulum of the thymus.
22 citations
,
October 2007 in “Journal of Investigative Dermatology” Stem cells in mouse nails are found in the nail matrix and may control nail growth.
1 citations
,
April 2024 in “The Journal of Dermatology” This case study reports that a woman with epidermolysis bullosa acquisita experienced severe cicatricial alopecia and total nail loss after discontinuing treatment for two years, highlighting the potential for serious effects if the condition is not managed.
42 citations
,
June 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” This study observed that PAI-2 is consistently expressed in differentiating cells of murine hair and nail, suggesting it may function as a marker of differentiation and possibly protect against premature cell death.
119 citations
,
January 2000 in “British Journal of Dermatology” This study found that keratin expression patterns vary within nail unit structures, with the nail matrix uniquely expressing the acidic hair-type keratin Ha1.
February 2026 in “Journal of Clinical Medicine” In this narrative review, researchers found preliminary evidence suggesting that minoxidil, both topical and oral, may enhance nail growth and improve nail strength and appearance, though more extensive studies are needed to confirm its efficacy and safety for this off-label use.
124 citations
,
December 1988 in “Differentiation” This study found that T cytokeratins appear more gradually and with complex coexpression patterns in developing nail structures compared to the more abrupt transition in hair follicles.
139 citations
,
October 2005 in “Journal of Investigative Dermatology” This study describes previously unknown immune characteristics of the normal human nail, highlighting its similarities to the hair follicle immune system and suggesting an immune privilege in the proximal nail matrix that both provides autoimmunity protection and presents infection susceptibility.
This study found that activating BMP signaling in rodent and primate models significantly promotes nail and digit regeneration after amputation by enhancing the role of specific nail stem cells, though extreme proximal amputation only permitted partial regeneration without bone reconstruction.
110 citations
,
August 2004 in “British Journal of Dermatology” In this study, researchers identified the ventral matrix as the primary source of nail plate formation, while the dorsal portion is generated by the apical matrix.
8 citations
,
September 2016 in “Journal of Investigative Dermatology” In this study, Flii overexpression in mice enhanced fingertip regeneration and nail formation after both distal and proximal amputations, suggesting a role in digit and hair follicle regeneration possibly involving Wnt signaling.
1 citations
,
January 2013 in “Journal of Investigative Dermatology” The document concludes that stem cells and their environments are crucial for skin and hair health and have potential for medical treatments.
January 2006 in “Elsevier eBooks” This review discusses the regeneration capabilities of various vertebrate tissues, focusing on the unique ability of certain species to regenerate teeth and lens, and reports no new results.
11 citations
,
October 1980 in “Archives of Dermatology” This case report describes a 75-year-old woman with pustular psoriasis who developed Beau's lines on her nails, coinciding with episodes of telogen effluvium.
This review reports that oral collagen peptide supplements may improve skin elasticity, hydration, and wrinkle appearance while also supporting hair and nail health and wound healing, but emphasizes the need for longer, high-quality studies due to current research limitations and variability in findings.
This study found that the nail immune system is similar to the hair follicle immune system, with both showing a relative "immune privilege" that may protect against autoimmunity.
3 citations
,
October 1994 in “Journal of Dermatological Science” This study developed a novel monoclonal antibody, TYHF-1, which specifically reacts with hair keratins but not with epidermal keratins or various other tissue cells.
19 citations
,
April 1999 in “British Journal of Dermatology” This study shows that keratin 2e exhibits distinct temporal and regional expression patterns in fetal epidermis, suggesting different regulatory and functional roles from other epidermal keratins.
54 citations
,
November 1994 in “Differentiation” This study found that trichohyalin is expressed in various normal and pathological epithelia beyond hair follicle cells, where it is uniquely associated with filaggrin, suggesting a specific role in aggregating K6/K16-containing intermediate filaments.
356 citations
,
December 1986 in “The journal of cell biology/The Journal of cell biology” This study found that specific human hair keratins are differentially expressed in the hair follicle, suggesting a shared pathway of epithelial differentiation between hair cortex and nail plate cells.
12 citations
,
March 2021 in “JAAD Case Reports” This study reported that immunotherapy in cancer patients can lead to skin-related immune adverse events, such as rashes, pruritus, and vitiligo, affecting a substantial proportion of patients.
135 citations
,
December 2013 in “Seminars in Cell & Developmental Biology” This review examines the literature on the molecular and cellular makeup of the hair follicle niche and how it influences stem cell behavior during hair regeneration, but does not provide new experimental results.
26 citations
,
July 2016 in “PLOS ONE” This study demonstrated that β-catenin signaling in CD133+ dermal papilla cells enhances postnatal hair growth by accelerating the proliferation and differentiation of keratinocytes in the murine hair cycle.
9 citations
,
January 2017 in “Elsevier eBooks” This chapter discusses the skin stem cell niche as a complex ecosystem and highlights the diverse components and interactions that influence stem cell function, but it reports no new experimental results.
10 citations
,
December 2021 in “Frontiers in cell and developmental biology” This study used single-cell RNA sequencing to map the cellular composition of sheep hair follicles, revealing differentiation pathways and potential molecular mechanisms for wool curvature, which may inform sheep breeding.
7 citations
,
May 2014 in “Clinical practice” This article reviews drug-induced hair and nail disorders and discusses their clinical recognition, underlying mechanisms, and potential treatment strategies, without presenting new research findings.
13 citations
,
September 1989 in “International Journal of Dermatology” Carbamazepine may cause reversible nail detachment.
September 2023 in “Journal of Cosmetic Dermatology” This study concluded that topical minoxidil could effectively accelerate nail growth in both healthy individuals and those with nail disorders, though the regimen might differ across these groups.
33 citations
,
September 2017 in “Journal of clinical immunology” This review summarizes recent findings on FOXN1's essential role in thymus and skin biology and discusses emerging therapeutic approaches for immune disorders with athymia, but reports no new clinical results.