27 citations
,
March 2018 in “Journal of Experimental Biology” This study found that hair curvature in merino wool is influenced by differences in cell type length rather than the proportions of orthocortical and paracortical cells.
36 citations
,
February 2018 in “British Journal of Dermatology” In this study, researchers found that eccrine sweat glands in human scalp skin are morphologically integrated into the pilosebaceous unit, suggesting they form a common homeostatic tissue environment with adjacent structures.
16 citations
,
November 2017 in “British Journal of Dermatology” This study proposes a model describing the transformation process from living to dead cells during early hair formation, highlighting the stepwise degradation of cellular functions.
30 citations
,
April 2017 in “Journal of structural biology” This study suggests that human keratin fiber matrix has a well-defined nano-scale grainy structure rather than being amorphous, with grain size influenced by chemical treatments, temperature, humidity, and follicle-level factors.
214 citations
,
April 2017 in “Cell” This study found that micro-niches within hair follicles create heterogeneity among stem cells and transit-amplifying cells, leading to specialized progenitors that control tissue morphogenesis and regeneration.
65 citations
,
March 2017 in “Experimental Dermatology” This review discusses the genetic and biological factors influencing hair curliness, revealing strong links to specific protein variations, and reports no new clinical results.
40 citations
,
March 2017 in “The journal of investigative dermatology/Journal of investigative dermatology” This study visualized mitochondrial metabolism in cultured bovine hair follicles and plucked human hairs, finding that ROS and mitochondrial polarization correlate in specific hair follicle regions, particularly near keratin deposition sites.
12 citations
,
May 2016 in “British Journal of Dermatology” This article reviews androgenetic alopecia and its underlying mechanisms, highlighting genetic and androgen factors in its onset, and does not report new research results.
38 citations
,
April 2016 in “Experimental Dermatology” This review discusses immunohistological and immunofluorescent methods for studying the human hair follicle cell cycle, reporting no new results, and suggests its potential for advancing cell cycle research.
73 citations
,
January 2016 in “International review of cell and molecular biology” Cornification evolved from keratinization in vertebrates, with differences between mammals and sauropsids.
16 citations
,
October 2015 in “Photochemistry and photobiology” This study found that higher concentrations of copper (II) ions in human hair increase protein oxidative modification, contributing to hair damage regardless of UV exposure and pigmentation level.
212 citations
,
September 2015 in “Journal of Investigative Dermatology” This article presents a comprehensive guide for classifying human hair follicle cycle stages in vivo using scalp xenografts on immunocompromised mice, offering valuable resources for researchers in the field.
120 citations
,
November 2014 in “Biological Reviews” This article explores the dynamic and energy-efficient nature of telogen hair follicles, challenging the notion of dormancy, and highlights their potential in advancing treatments for hair growth disorders.
22 citations
,
November 2014 in “Proteins Structure Function and Bioinformatics” In this study, researchers mapped cysteine accessibility in wool keratins and KAPs, revealing that certain cysteines in keratin end domains and Types I and II rod domains are accessible and likely involved in forming disulfide bonds.
55 citations
,
February 2014 in “Journal of Structural Biology” This study observed that human hair macrofibrils predominantly exhibit a double-twist architecture with varying inter-macrofibril angles, advancing insights into their structural organization and mechanical implications.
17 citations
,
October 2013 in “Plastic and reconstructive surgery. Global open” This review examines misconceptions and gaps in the understanding of androgenic alopecia (AGA) etiopathogenesis, offering new perspectives but no new experimental results.
27 citations
,
July 2013 in “Journal of Dermatological Science” The conclusion is that androgenetic alopecia and senescent alopecia have unique gene changes, suggesting different causes and potential treatments for these hair loss types.
211 citations
,
April 2013 in “Development” In this study, researchers found that the number of dermal papilla cells in hair follicles determines hair size and shape in mice, suggesting potential avenues for addressing hair loss.
61 citations
,
April 2012 in “British Journal of Dermatology” This study analyzed changes in hair diameter and density with age in Caucasian women, highlighting variations in perception of hair amount over time.
75 citations
,
December 2011 in “British Journal of Dermatology” This review discusses female pattern hair loss, its psychological impact, and available treatments but provides no new clinical findings; the authors emphasize early intervention for better outcomes.
185 citations
,
December 2010 in “Archives of Biochemistry and Biophysics” Keratin gene mutations cause various skin and hair disorders, but new research offers hope for future treatments.
89 citations
,
September 2010 in “Annual Review of Genomics and Human Genetics” This review discusses the genetic factors involved in hair follicle morphogenesis and cycling and reports no new clinical results; it emphasizes the role of genes in hereditary hair diseases.
314 citations
,
April 2010 in “Developmental Cell” This study found that in mice, inactivating beta-catenin in the dermal papilla reduces hair follicle progenitor proliferation and disrupts the hair cycle.
40 citations
,
January 2010 in “International Journal of Trichology” This review discusses the diagnostic criteria and guidelines for managing loose anagen syndrome and differentiating it from non-scarring alopecias, but it reports no new clinical results.
321 citations
,
December 2009 in “Journal of Dermatological Science” This review discusses the role of dermal cells in hair follicle regeneration and morphogenesis and highlights their potential therapeutic implications, but it reports no new empirical findings.
87 citations
,
July 2009 in “The journal of investigative dermatology/Journal of investigative dermatology” This study found that beard hair medulla cells express an unexpected range of keratins, showing variability and promiscuous behavior in keratin interactions distinct from other hair follicle cells.
81 citations
,
April 2009 in “Journal of Investigative Dermatology” This review discusses the shedding phase of the hair cycle, known as exogen, and reports no new findings while analyzing related processes like club fiber formation and release.
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.
19 citations
,
January 2009 in “International review of cell and molecular biology” This review explains the mechanical composition and molecular interactions that determine hair's mechanical properties, without providing any new experimental findings.
62 citations
,
December 2008 in “Journal of structural biology” This study found that in naturally curved human scalp hairs, distinct arrangements of cell types on either side of the hair fiber contribute to its curvature.
30 citations
,
August 2008 in “The journal of investigative dermatology/Journal of investigative dermatology” This study suggests that TGase 3 may contribute to hair fiber scaffolding by forming specific isopeptide bonds between keratin intermediate filaments and keratin-associated proteins.
59 citations
,
June 2008 in “Journal of The American Academy of Dermatology” This article reviews major types of genetic hair shaft defects and associated syndromes, emphasizing understanding histologic features and diagnostic methods, but reports no new clinical findings.
47 citations
,
November 2007 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” This review discusses how various factors, including cosmetic procedures and scalp conditions, can damage hair, but highlights the availability of products to improve hair health; it reports no new empirical results.
85 citations
,
October 2007 in “International Journal of Dermatology” In this study, researchers found that the curliness of human hair is associated with an asymmetric structure at the cellular level, particularly in the differentiation of the precortex.
95 citations
,
October 2007 in “International Journal of Dermatology” This study found that human hair can be classified into eight main types based on objective measurements of shape, rather than ethnic categories, enhancing the understanding of hair diversity globally.
34 citations
,
September 2007 in “Experimental Dermatology” This study found that the outer protein layer of Merino wool is rich in sulfur-containing proteins similar to those found in both sheep wool and human hair.
70 citations
,
February 2007 in “Journal of Investigative Dermatology” K39 and K40 are the last keratins expressed in hair development, completing the hair keratin catalog.
254 citations
,
January 2007 in “Chemical Society Reviews” This review discusses the hierarchical structure and chemical properties of hair fibers and offers insights for chemists and biochemists, but reports no new experimental findings.
65 citations
,
May 2006 in “Journal of Structural Biology” This study concluded that the curliness of human hair, regardless of ethnicity, originates from the inhomogeneous internal nanostructure due to differences in the distribution of two types of cortices.
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.
450 citations
,
January 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” This article reviews follicular melanogenesis, detailing how melanin synthesis and its regulation in hair follicles depend on a complex interplay of cellular and molecular mechanisms, but reports no new clinical findings.
26 citations
,
December 2003 in “Experimental Dermatology” In this study, researchers identified two de novo germline missense mutations in the hair keratins hHb1 and hHb6 in patients with monilethrix whose parents were not clinically affected.
139 citations
,
June 2003 in “Journal of Investigative Dermatology Symposium Proceedings” This article reviews androgenetic alopecia in women, highlighting diagnosis criteria and noting that topical minoxidil is currently the only proven treatment for hair growth; it reports no clinical trial findings.
158 citations
,
May 2003 in “Journal of Investigative Dermatology” This study observed that hair follicle mesenchyme in mice exhibits significant plasticity during the hair cycle, with cell migration and changes in papilla size impacting hair production.
165 citations
,
December 2002 in “Molecular and Cellular Endocrinology” This study found that finasteride improves scalp hair growth in men with male pattern hair loss by reducing scalp dihydrotestosterone levels, but it did not benefit postmenopausal women with female pattern hair loss.
86 citations
,
May 2002 in “Journal of Investigative Dermatology” This study characterized a new human keratin, hK6irs1, specifically found in the inner root sheath of hair follicles, which suggests its role in the structural integrity and guidance of growing hair shafts.
236 citations
,
July 2001 in “Trends in Molecular Medicine” This review discusses common hair loss conditions and explores how advancements in hair follicle biology might lead to more effective treatments but reports no new results.
77 citations
,
March 2001 in “Clinics in Dermatology” This article discusses treatment approaches for female pattern hair loss and concludes that available medical treatments are effective in reversing or stabilizing the condition in most cases of mild-to-moderate severity.
520 citations
,
February 2001 in “Journal of Clinical Investigation” This study found that VEGF significantly enhances perifollicular vascularization during the hair growth phase, accelerating hair regrowth and increasing follicle and hair size, while its inhibition retards 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.
32 citations
,
August 1999 in “Journal of Investigative Dermatology” This study found that individuals with early onset extensive androgenetic alopecia have an elevated ratio of DHT to testosterone, but no significant genetic linkage to markers on chromosomes 2 or 5 was detected.
179 citations
,
September 1998 in “BMJ” This article reviews the pathogenesis, genetic basis, and recent treatment breakthroughs for androgenetic alopecia but reports no new clinical findings.
43 citations
,
April 1996 in “Journal of Investigative Dermatology” 86 citations
,
January 1996 in “Clinics in dermatology” This review discusses the effects of protein-based cosmetics on hair properties and reports no new research findings, suggesting potential benefits for developing advanced, sustainable hair products.
54 citations
,
January 1995 in “Human Molecular Genetics” This study mapped monilethrix, a hereditary hair and nail disorder, to the type II keratin cluster on chromosome 12q, marking the first primary human hair disorder localization and implicating defects in "hard" keratins.
71 citations
,
June 1993 in “Journal of Investigative Dermatology” 143 citations
,
October 1988 in “Clinics in Dermatology” This review discusses the histopathology of male-pattern baldness and highlights ongoing disputes over several aspects, including sebaceous gland size and follicle loss, reporting no new clinical findings.
15 citations
,
January 1988 Hair follicles have unique proteins that vary by species and are influenced by nutrition.
203 citations
,
November 1984 in “Journal of the American Academy of Dermatology” This study presents evidence suggesting that androgenetic alopecia is most likely inherited through a polygenic model, challenging the traditional view that it is caused by a simple Mendelian autosomal dominant gene.
22 citations
,
September 1982 in “Journal of ultrastructure research” This study reports new cellular features and complex interaction systems in fiber differentiation, indicating more intricate cellular organization than previously recognized, including features like mast cells and primary cilia.
90 citations
,
January 1979 in “International review of cytology” This chapter reviews the complexity of hair and wool follicle formation, emphasizing the importance of cytological studies to understand the relationship between cellular components.
6 citations
,
June 1976 in “Journal of ultrastructure research” This study identified the presence of recognizable organelles, such as lysosomes and mitochondria, in both the keratinized fiber and the hardened inner root sheath of the Romney wool follicle.
125 citations
,
February 1971 in “Biochemistry” Specific cross-linkages help make hair proteins stable and strong.