36 citations
,
November 2009 in “Journal of Investigative Dermatology” This study suggests that prolactin has complex, gender- and location-dependent effects on human hair follicles, promoting hair growth in female frontotemporal scalp areas while inhibiting it in male occipital regions.
43 citations
,
September 2009 in “Stem Cells” This study reported that GFP labeling driven by the K15 promoter enables visualization and selection of stem cells in adult human scalp hair follicles for further analysis and manipulation.
8 citations
,
June 2009 in “British Journal of Dermatology” Human melanocytes in skin and hair follicles don't express keratin 16 or 6 naturally.
23 citations
,
March 2009 in “Skin Pharmacology and Physiology” This study found significant hormonal differences, including elevated cortisol and androstenedione levels, in both male and female androgenic hair loss patients compared to controls, suggesting complex hormonal interactions in the condition.
54 citations
,
March 2009 in “BioEssays” This review discusses the complex hormonal control of keratin expression in skin and its potential implications for treating skin and hair disorders, but reports no new clinical results.
79 citations
,
February 2009 in “Human Genetics”
759 citations
,
February 2009 in “Current Biology” This review summarizes fundamental concepts and recent advancements in hair follicle biology, including insights from mouse models into broader molecular and cellular processes relevant to regeneration and development.
98 citations
,
December 2008 in “Journal of Investigative Dermatology” This review discusses the possible impacts of prolactin on skin conditions like psoriasis, alopecia, and stress-related dermatoses, emphasizing the need for further research to explore its therapeutic potential.
67 citations
,
December 2008 in “Developmental Biology” This study found that the transcription factors Msx2 and Foxn1 are crucial for maintaining Notch1 expression in the hair follicle matrix, which is necessary for proper hair differentiation.
90 citations
,
December 2008 in “Journal of Investigative Dermatology” Thyroid-stimulating hormone affects hair follicles but doesn't change hair growth or color.
71 citations
,
October 2008 in “The journal of investigative dermatology/Journal of investigative dermatology” This study presents a novel in vitro assay using human folliculoid microspheres to research hair growth, which may facilitate preclinical testing of hair growth-modulatory agents.
115 citations
,
August 2008 in “The Journal of Clinical Endocrinology & Metabolism” In this study, T3 and T4 were found to directly influence human hair follicles in vitro, enhancing keratinocyte proliferation, prolonging the hair growth phase, and affecting pigmentation.
1398 citations
,
May 2008 in “Histochemistry and Cell Biology” This review summarizes the cell type distribution and functional significance of human keratins, emphasizing their roles in tumor diagnosis and potential clinical applications, and reports no new clinical findings.
42 citations
,
March 2008 in “Molecular and Cellular Endocrinology” This review explores the potential (neuro-)endocrine influences on hair follicle epithelial stem cell biology and emphasizes the need for more systematic research, but it provides no new empirical results.
45 citations
,
December 2007 in “The FASEB journal” This study demonstrated that hair follicle bulge stem cells can form epidermis in a tissue-engineered skin model, highlighting the significance of K5/K17 filaments in slow-cycling stem cell subsets.
71 citations
,
May 2007 in “The FASEB journal” This study found that human hair follicles express erythropoietin and its receptor, suggesting these follicles may use erythropoietin signaling to modulate apoptosis under stress conditions like hypoxia and chemotherapy.
138 citations
,
March 2007 in “Experimental cell research” This review discusses hair keratins and hair follicle-specific epithelial keratins and their association with inherited hair disorders, reporting no new clinical results.
159 citations
,
July 2006 in “Endocrine Reviews” This article discusses the influence of estrogens on hair follicle growth and metabolism, suggesting a significant role alongside androgens in hair growth control but reports no new clinical results.
93 citations
,
July 2006 in “Journal of Investigative Dermatology” This study describes the expression patterns of type I inner root sheath keratin proteins K25–K28 in human hair follicles, highlighting their distinct distribution within different layers.
128 citations
,
March 2006 in “American Journal of Pathology” The study found that prolactin expressed in human scalp hair follicles acts as an autocrine modulator, inhibiting hair growth and promoting hair follicle regression, which may contribute to hair loss in hyper-prolactinemia patients.
137 citations
,
January 2006 in “Frontiers in bioscience” This review discusses the role of corticotropin-releasing hormone in human skin, focusing on its regulation, receptors, and functions, and highlights parallels with the hypothalamo-pituitary-adrenal axis; it reports no new research findings.
489 citations
,
June 2005 in “The FASEB Journal” This study found that human scalp hair follicles can respond to corticotropin releasing hormone stimulation similarly to the classical HPA axis, including up-regulating cortisol production and activating neuroendocrine feedback loops.
349 citations
,
January 2005 in “The FASEB journal” This review discusses the cutaneous serotoninergic/melatoninergic system's potential role in skin function and resilience against environmental and internal stresses, but does not report new experimental findings.
276 citations
,
January 2005 in “International review of cytology” More research is needed to understand how hair keratins work and their role in hair disorders.
49 citations
,
March 2004 in “Journal of Investigative Dermatology” This study found that the hHa7 gene in hair follicle trichocytes is the first identified to have its expression directly regulated by androgens, suggesting it as a marker for androgen action on hair follicles.
146 citations
,
January 2004 in “Hormones” This review explores the complex endocrine functions of human skin and its role as a peripheral endocrine organ, but reports no new clinical results.
91 citations
,
May 2003 in “American Journal of Pathology” This study found that prolactin and its receptor are expressed in the murine hair follicle epithelium, influencing hair cycle phases by down-regulating keratinocyte proliferation during anagen and inducing premature catagen.
158 citations
,
December 2002 in “Development” In this study, Msx2-deficient mice showed progressive hair loss due to shortened anagen phase and prolonged catagen and telogen phases, resulting in cyclic alopecia with structurally abnormal hair shafts.
73 citations
,
June 2001 in “Endocrinology” In this study, researchers found that disrupting the PRL gene in mice led to earlier hair molting, especially in females, suggesting that PRL inhibits murine hair cycle events.
114 citations
,
May 2001 in “Development” This study found that overexpressing the Hoxc13 gene in mice causes hair loss and a skin condition similar to ichthyosis, identifying several gene targets that may regulate hair growth.
1113 citations
,
August 1999 in “The New England Journal of Medicine” This article discusses the biologic and psychosocial significance of hair, the current limitations in hair growth drugs, and anticipates future therapies based on advancing hair follicle research.
235 citations
,
July 1999 in “Journal of biological chemistry/The Journal of biological chemistry” This study establishes a catalog of human type I hair keratins and identifies their specific roles and expression patterns during hair differentiation and growth in scalp follicles.
441 citations
,
May 1996 in “Journal of Cell Science” This study found that keratin 19 may be a marker for skin stem cells, helping to characterize these cells in different conditions and potentially explaining variations in healing rates between children and adults.
62 citations
,
December 1994 in “Journal of Endocrinology/Journal of endocrinology” In this study, administrating ovine prolactin accelerated secondary hair follicle reactivation and moulting in cashmere goats, while bromocriptine delayed these processes.
385 citations
,
November 1990 in “Journal of Cell Science” This study successfully grew and maintained human hair follicles in vitro, noting that TGF-β1 negatively affects growth, while EGF replicates hair-removal effects seen in animals.