March 2010 in “Faculty Opinions – Post-Publication Peer Review of the Biomedical Literature” This study found that both epithelial and hair keratins are expressed in beard hair medulla cells, exhibiting unique patterns and interactions distinct from other hair follicle and epithelial cells.
61 citations
,
January 2011 in “PloS one” In this study, researchers found that Notch signaling is crucial for late-stage epidermal differentiation and postnatal hair cycle homeostasis by regulating hair follicle stem cell proliferation and differentiation.
4 citations
,
January 2011 in “Cell stem cell” This study reveals that stem cell descendants in mouse hair follicles can return to their niche to retain stemness and function as primary stem cells for future hair cycles.
170 citations
,
November 2007 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that in the absence of hair follicles, cutaneous wounds in mice showed delayed reepithelialization but eventually achieved normal wound closure after expanding the activated epidermis region.
105 citations
,
October 2017 in “Stem cells” This review discusses Wnt signaling pathways in skin development and stem cell regulation, highlighting potential interactions with other pathways but reports no new findings.
84 citations
,
April 2002 in “Archives of Dermatology” This study found that a keratin mutation may cause diffuse partial woolly hair associated with loose anagen hair syndrome in some families, but other genetic factors could play a role in different cases.
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.
52 citations
,
May 1997 in “Journal of Biological Chemistry” This study suggests that polyamines regulate CK2 enzyme activity and its subcellular distribution, as demonstrated in mouse models and cell cultures with elevated levels of ornithine decarboxylase.
48 citations
,
March 2010 in “PloS one” This study found that the co-ablation of C/EBPalpha and C/EBPbeta in adult mouse skin disrupted sebocyte differentiation and epidermal homeostasis, highlighting their critical roles in these processes.
21 citations
,
January 2018 in “Journal of Investigative Dermatology” This study found that large excisional wounds in rats across seven strains do not regenerate new hair follicles, unlike in mice, possibly due to differences in epidermal competence and transcriptional profiles.
3 citations
,
November 2022 in “Frontiers in Medicine” This study suggests that onychopapilloma may originate from the nail bed rather than the nail matrix, with nail bed-related keratins and HK31 potentially serving as diagnostic markers.
July 2024 in “Journal of Investigative Dermatology” In this animal study, researchers found that the simultaneous deletion of ERBB2 and ERBB3 in mice results in impaired skin differentiation, inflammation, and sebaceous gland alteration, leading to skin lesions, while highlighting potential side effects in cancer therapies targeting these receptors.
42 citations
,
September 2003 in “Journal of Investigative Dermatology” A missing mK6irs1 gene causes hair loss in mice.
January 2024 in “JEADV clinical practice” This study reviewed research on the psychosocial effects of gender-affirming dermatology treatments in transgender populations, finding mostly positive associations but noting significant limitations and the need for more comprehensive studies to clearly understand these effects.
351 citations
,
February 2010 in “Nature Cell Biology” Basal cell carcinoma mostly starts from cells in the upper skin layers, not hair follicle stem cells.
788 citations
,
February 2007 in “Nature” This review explores how adult skin epithelia preserve stem cell populations for hair follicle regeneration and wound healing, but reports no new experimental results.
2 citations
,
January 2011 in “Dental Medicine Research” This study suggests that Keratin 6hf may be a potential marker of oral squamous cell carcinoma and could play a role in its progression, though further research is needed to understand its function.
101 citations
,
December 2010 in “The journal of investigative dermatology/Journal of investigative dermatology” This study reports the successful differentiation of mouse induced pluripotent stem cells into keratinocytes that can regenerate skin and its structures in an in vivo environment.
10 citations
,
October 1993 in “Archives of dermatological research” The researchers reported that the antipsoriatic compounds 1,25-dihydroxy-vitamin D3 and calcipotriol thinned the living cell compartment in organotypic ORS cultures by accelerating the differentiation pathway rather than affecting proliferation.
April 2024 in “bioRxiv (Cold Spring Harbor Laboratory)” In a keratinocyte-specific knockout mouse model, this study found that deleting GRK2 disrupted hair follicle homeostasis, causing cyst-like structures, abnormal growth patterns, and eventual hair loss, suggesting potential links to immune-mediated alopecias.
199 citations
,
January 2004 in “The International Journal of Developmental Biology” This review discusses advances in understanding hair and hair follicle structure, gene expression, and molecular signals in hair formation, without reporting new clinical findings.
41 citations
,
June 2013 in “PLOS ONE” This study demonstrated that engineered skin substitutes using human keratinocytes and murine dermal papilla cells can develop pigmented hairs without sebaceous glands, suggesting separate pathways for hair development and eruption.
13 citations
,
May 2022 in “Cell discovery” This study used single-cell RNA sequencing to create a detailed atlas of human scalp hair follicles and found that early-stage hair graying involves matrix hair progenitor depletion linked to P53 pathway activation.
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.
149 citations
,
July 2000 in “Molecular and Cellular Biology” This study found that MK6a-deficient mice showed delayed reepithelialization after superficial wounding but not after full-thickness skin wounds, suggesting MK6a plays a role in activating follicular keratinocytes post-wounding.
30 citations
,
October 1999 in “Differentiation” This study found that expression of certain mutant keratin genes in mice led to severe alopecia, suggesting a similar mechanism could cause hair loss in humans.
80 citations
,
June 2002 in “Molecular Biology of the Cell” This study found that type II keratins in proliferating epithelial tissues are phosphorylated at a conserved motif during mitosis and stress, impacting keratin solubilization and reorganization.
January 2026 in “Advanced Science” In this study, a chronotherapeutic bilayer dressing system showed enhanced diabetic wound healing in a model by reducing inflammation through polyphenols and promoting repair with sustained PDGF-BB delivery, leading to faster re-epithelialization and hair follicle regeneration.
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.
426 citations
,
August 2014 in “Nature Medicine” This narrative review examines the interactions between skin stem cells and their niches, finding new insights from advancements in genetic and imaging tools but reporting no new experimental results.