29 citations
,
December 2005 in “BioEssays” This study found that Wnt/β‐catenin signaling influences the hair follicle regeneration process by prompting quiescent stem cells to enter the cell cycle and is necessary for maintaining the stem cell pool.
319 citations
,
November 2005 in “Proceedings of the National Academy of Sciences” This study suggests that hair follicle stem cells from transgenic mice can improve nerve regeneration and function, highlighting their potential as an autologous source for regenerative medicine.
52 citations
,
October 2005 in “Journal of Investigative Dermatology” This study found that human hair follicle stem cells formed more colonies and adhered more rapidly, while transit-amplifying cells showed significantly greater mobility.
63 citations
,
October 2005 in “Archives of Dermatology” This study reports that a hair shedding threshold of 100 hairs or more may provide the best concordance with clinical diagnosis for distinguishing chronic telogen effluvium from androgenetic alopecia.
113 citations
,
September 2005 in “Journal of Investigative Dermatology” This study found that a topical hedgehog agonist can stimulate hair growth by promoting the transition from the resting to growth phase of the hair cycle in adult mouse skin.
74 citations
,
April 2005 in “Dermatologic Clinics” This article reviews treatment options for male-pattern and female-pattern hair loss, telogen effluvium, and alopecia areata, but provides no new clinical results; algorithmic management approaches are included.
54 citations
,
January 2005 in “Journal of The American Academy of Dermatology” In this study, four women with chronic telogen effluvium experienced fluctuating hair shedding without visible reduction in hair density or follicular miniaturization over at least 7 years.
479 citations
,
January 2005 in “BioEssays” This review introduces the morphological and molecular principles of hair follicle development but reports no new experimental results, focusing on recent insights and forming a working hypothesis.
30 citations
,
September 2004 in “Experimental Dermatology” This study found that minoxidil did not significantly increase hair shaft elongation in ex vivo human hair follicle culture, questioning the suitability of this method for studying its hair-growth-promoting effects.
162 citations
,
August 2004 in “Journal of Investigative Dermatology” This study suggests that stress negatively affects hair growth by inducing inflammation and early hair cycle transitions in mice, which might inform strategies for managing stress-related hair loss in humans.
268 citations
,
December 2003 in “Experimental Dermatology” This study demonstrated that clonal dermal papilla and dermal sheath cell lines from hair follicles can differentiate into lipid and bone cells, suggesting their potential as a stem cell source for tissue engineering.
155 citations
,
December 2003 in “British Journal of Dermatology” In this study, the researchers did not confirm previously reported links between AGA and smoking or benign prostatic hypertrophy, but found potential associations with alcohol consumption and lean body mass at age 21 that merit further investigation.
9 citations
,
November 2003 in “Journal of Investigative Dermatology” This study found an association between low serum ferritin levels and alopecia in women, suggesting a potential role of iron in hair health and paving the way for further research.
163 citations
,
November 2003 in “Journal of Investigative Dermatology” This study found that women with androgenetic alopecia or alopecia areata have significantly lower serum ferritin levels than those without hair loss, suggesting a potential link between these types of alopecia and decreased iron stores.
46 citations
,
September 2003 in “International Journal of Dermatology” This study found that trichodynia is common among patients with telogen effluvium and androgenetic alopecia, and it often coexists with psychological issues like depression and anxiety.
14 citations
,
September 2003 in “Archives of Dermatology” This abstract provides no new data or findings as it is a placeholder text rather than a research summary.
155 citations
,
August 2003 in “Journal Of Experimental Zoology Part B: Molecular And Developmental Evolution” This review discusses the conserved molecular mechanisms controlling hair follicle development and cycling and suggests they may also apply to other ectodermal derivatives, like teeth and feathers, but it reports no new results.
26 citations
,
July 2003 in “Journal of Cutaneous Medicine and Surgery” This study found that topical minoxidil solution is a safe treatment for androgenetic alopecia, with no increase in cardiovascular events or adverse pregnancy outcomes observed.
54 citations
,
June 2003 in “The journal of investigative dermatology. Symposium proceedings/The Journal of investigative dermatology symposium proceedings” This speculative review discusses hair cycle-dependent fibroblast dynamics and possible impacts on human hair growth, synthesizing current literature without presenting new clinical 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.
194 citations
,
March 2003 in “American Journal of Pathology” This study found that psychoemotional stress disrupts hair growth in mice by terminating anagen and suggests a potential pathway for pharmacological management of stress-related hair loss in humans.
164 citations
,
January 2003 in “Drugs” 
30 citations
,
October 2002 in “Journal of The American Academy of Dermatology” Use "female pattern hair loss" term, finasteride may help, more research needed.
107 citations
,
September 2002 in “Journal of Investigative Dermatology” This study identified a distinct "exogen" phase in the hair cycle during which hair shedding occurs, primarily coupled with the anagen phase, rather than as part of the telogen phase.
80 citations
,
August 2002 in “Journal of Dermatology” This study found that combining oral finasteride with topical minoxidil resulted in the greatest improvement in hair growth for male patients with androgenetic alopecia, compared to using any single treatment.
144 citations
,
July 2002 in “Clinical and Experimental Dermatology” This article reviews the concept of telogen effluvium and emphasizes the importance of identifying triggers and using diagnostic investigations to determine the cause of hair loss, without reporting new results.
86 citations
,
July 2002 in “Clinical and Experimental Dermatology” This review discusses female pattern hair loss, emphasizing its complex causes and the limited treatment options available, and reports no new clinical results.
149 citations
,
June 2002 in “British Journal of Dermatology” Minoxidil works better for female hair loss, but cyproterone reduces scalp oiliness and causes menstrual issues.
146 citations
,
May 2002 in “The American journal of pathology” This study found that cathepsin L deficiency in mice led to significant abnormalities in hair follicle development and cycling, including disrupted hair shaft outgrowth and premature hair growth phase entry.
854 citations
,
February 2002 in “The journal of investigative dermatology/Journal of investigative dermatology” This review summarizes recent advances in understanding the molecular mechanisms of hair follicle formation and discusses potential future clinical applications for treating hair loss and skin tumors, but it reports no new clinical results.
211 citations
,
October 2001 in “The FASEB Journal” This study found that the BMP antagonist noggin induces hair growth in postnatal skin by neutralizing BMP4's inhibitory activity, potentially mediated by changes in Shh expression.
116 citations
,
September 2001 in “Journal of The American Academy of Dermatology” This study suggests that miniaturization in pattern hair loss may occur abruptly and can be reversed with treatment, as supported by histologic evidence in finasteride-responsive patients.
157 citations
,
July 2001 in “British Journal of Dermatology” In this study, the prevalence of androgenetic alopecia among Korean men and women was found to be lower than in caucasians, with Korean men showing more frontal hairline preservation and a higher incidence of 'female pattern' hair thinning.
239 citations
,
November 2000 in “Journal of The American Academy of Dermatology” In this study, finasteride 1 mg/day for 12 months did not improve hair growth or slow hair thinning in postmenopausal women with androgenetic alopecia compared to placebo.
194 citations
,
May 2000 in “Journal of Investigative Dermatology” This study demonstrated that blocking the Sonic hedgehog signaling pathway in mice led to reversible inhibition of body coat hair morphogenesis, while whisker development was unaffected.
66 citations
,
January 2000 in “Hormone Research in Paediatrics” This study suggests that the paradoxical effects of androgens on hair growth are due to differential gene expression in hair follicles, possibly established during embryogenesis.
231 citations
,
December 1999 in “Journal of Investigative Dermatology” This study found that the volume of a hair follicle's dermal papilla is strongly correlated with its size, primarily due to the number of cells it contains and the volume of extracellular matrix.
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.
132 citations
,
November 1998 in “Journal of the American Academy of Dermatology” This review evaluates the efficacy and safety of topical sensitizers in treating alopecia areata but reports no new clinical findings.
131 citations
,
November 1998 in “The journal of investigative dermatology/Journal of investigative dermatology” This study observed that alopecia areata can be induced and serially transferred in C3H/HeJ mice using skin grafts, providing a useful model for studying the disease in humans.
71 citations
,
January 1998 in “Pathobiology” This review discusses the use of animal models to study alopecia areata and reports no new experimental results, emphasizing the potential for these models to explore the disease's genetics and treatment.
72 citations
,
September 1997 in “Journal of Investigative Dermatology” 
416 citations
,
September 1997 in “Journal of Investigative Dermatology” People with hair loss have more androgen receptors and enzymes in certain follicles, with men and women showing different patterns.
101 citations
,
January 1997 in “Journal of Investigative Dermatology Symposium Proceedings” This review discusses neural mechanisms involved in hair growth control, focusing on piloneural interactions, but reports no clinical findings; the authors suggest further exploration for managing hair growth disorders.
114 citations
,
October 1996 in “Dermatologic clinics” This chapter reviews laboratory models used for studying alopecia therapies but provides no new experimental findings.
17 citations
,
July 1994 in “Journal of Dermatological Science” This article reviews the genetic and potential environmental factors in alopecia areata's pathogenesis and suggests a polygenic model but reports no new clinical findings.
60 citations
,
February 1992 in “British Journal of Dermatology” In this study, serum from patients with alopecia areata or universalis did not affect hair growth in transplanted scalp skin grafts on nude mice, despite increased deposition of immunoreactants.
44 citations
,
December 1991 in “Annals of the New York Academy of Sciences” This study observed that epidermal growth factor and fibroblast growth factor have distinct roles in sheep skin, with EGF involved in differentiation and FGF in bulb proliferation and fiber growth.
78 citations
,
March 1987 in “Journal of The American Academy of Dermatology” Minoxidil promotes hair growth but stops working when discontinued.
18 citations
,
March 1984 in “BMJ” Minoxidil helps hair regrowth in alopecia, but more research needed.
80 citations
,
October 1983 in “BMJ” This study found that 1% topical minoxidil induced significant hair regrowth in patients with alopecia areata, though it was less effective for those with extensive hair loss such as alopecia totalis and universalis.
