550 citations
,
December 2005 in “The Journal of clinical investigation/The journal of clinical investigation” This study found that bulge cells marked by CD200+ in human hair follicles show high colony-forming efficiency, suggesting successful enrichment of keratinocyte stem cells.
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.
1279 citations
,
November 2005 in “Nature Medicine” 
291 citations
,
October 2005 in “Proceedings of the National Academy of Sciences of the United States of America” This study found that rat whisker follicle stem cells can be expanded in culture and transplanted to form functional hair follicles, demonstrating their multipotency and potential for regenerative medicine.
417 citations
,
September 2005 in “PLoS biology” This study developed molecular signatures for dermal papilla cells and their niche, uncovering novel signaling regulators and genes linked to hair disorders, which may inform future hair development research.
27 citations
,
August 2005 in “The journal of investigative dermatology/Journal of investigative dermatology” This study identified 12 new genes associated with the hair follicle and various stages of the hair cycle in mice, which could lead to novel targets for hair growth or depilation therapies.
56 citations
,
July 2005 in “Experimental Dermatology” This study demonstrated that hair follicle-derived cells can induce hair follicle formation in an in vitro skin organ culture system using human retroauricular skin specimens.
195 citations
,
June 2005 in “American Journal of Human Genetics” Genetic variation in the androgen receptor gene mainly causes early-onset hair loss, with maternal inheritance playing a key role.
205 citations
,
April 2005 in “Journal of Investigative Dermatology” This study describes a system for generating hair follicles from dissociated cells in mice, suggesting that successful development requires a foundational epithelial platform.
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.
33 citations
,
December 2004 in “Differentiation” In this study, mouse amnion epithelium was successfully transformed into skin and hair follicles when associated with hair-forming dermis, revealing the necessity of specific influences for follicle formation.
15 citations
,
May 2004 in “Facial Plastic Surgery Clinics of North America” This article discusses follicular cell implantation as a potential solution for hair restoration limitations, but notes inconsistencies and challenges in human applications, reporting no new clinical results.
55 citations
,
January 2004 in “The International Journal of Developmental Biology” This study reports that corneal transient amplifying cells can be reprogrammed into epidermal cells capable of forming hair follicles in response to embryonic dermis signals.
47 citations
,
December 2003 in “Journal of Investigative Dermatology” DS cells in hair follicles can help form and restore hair, especially in hair loss conditions.
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.
208 citations
,
December 2003 in “Journal of Investigative Dermatology” This study found that dermal papilla and peribulbar dermal sheath cup cells in mice can both induce hair follicle formation, suggesting they may have similar functional roles in hair growth.
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.
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.
13 citations
,
October 2002 in “Journal of Investigative Dermatology” This study found that only one upper portion of a bisected human hair follicle successfully regenerated a complete new follicle with a pigmented hair in nude mice, although the overall success rate was very low.
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.
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.
13 citations
,
December 2001 in “Journal of Investigative Dermatology” This study demonstrated that the tracheal xenotransplant procedure is an effective technique for assessing the invasiveness of epidermal keratinocytes and studying factors affecting hair follicle formation.
19 citations
,
November 2001 in “Journal of Investigative Dermatology Symposium Proceedings” This study observed that human hair follicles with a completely destroyed bulb can regenerate after being grafted onto immunodeficient mice, entering a shortened dystrophic telogen followed by anagen phase.
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.
66 citations
,
August 2001 in “Experimental Dermatology” This study demonstrated that intact adult human dermal papillae can induce hair growth when implanted into mouse hair follicles, highlighting their potential for advancing hair follicle biology and therapeutic approaches.
299 citations
,
March 2001 in “Journal of Investigative Dermatology” This study found that specific genetic markers near the androgen receptor gene are significantly more common in men with male pattern baldness, suggesting a genetic component in its development.
949 citations
,
January 2001 in “Cell” This study demonstrated that multipotent stem cells in adult mice whisker follicles migrate to produce whisker growth, and that this process requires precise control of stem cell trafficking.
31 citations
,
August 2000 in “Journal of Investigative Dermatology” This study found that when human hair follicles were grafted onto mice, they progressed through dystrophic stages and returned to normal growth, with stem cells aiding in recovery.
1010 citations
,
August 2000 in “Cell” In this study, researchers found that hair follicle stem cells in mice can generate both hair follicle and epidermis cells, highlighting their potential bipotency.
50 citations
,
July 2000 in “Dermatologic Surgery” Female and male AGA are different diseases.
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.
57 citations
,
August 1997 in “Microscopy Research and Technique” This review discusses novel molecular techniques in skin appendage research and summarizes the distribution of key molecules, but it reports no new experimental results.
72 citations
,
December 1996 in “Journal of Investigative Dermatology” This study observed that human hair follicles were able to regenerate fiber-forming structures after the bulb was amputated and transplanted onto athymic mice, suggesting a general regenerative capacity.
31 citations
,
September 1996 in “Differentiation” This study claims that the upper dermal sheath of rat vibrissa follicles can induce hair growth under specific conditions, challenging prior beliefs about its lack of inductive capacity.
80 citations
,
January 1995 in “The American Journal of Medicine” Hair loss in androgenetic alopecia is caused by genetic factors and androgen excess, and can be treated with combined therapies.
125 citations
,
August 1992 in “Development” This study found that implanting isolated adult rat dermal papillae into ear cuts led to the emergence of unusually large vibrissa-type hair follicles, demonstrating their capacity to induce specific hair fiber characteristics.
124 citations
,
April 1992 in “Journal of Endocrinology/Journal of endocrinology” This study observed that cells from androgen-sensitive areas like the beard and scrotum showed higher androgen receptor levels compared to those from non-balding scalp areas, supporting the role of dermal papilla in follicle growth responses to androgens.
87 citations
,
October 1987 in “Journal of Investigative Dermatology” 
666 citations
,
September 1977 in “British Journal of Dermatology” This article presents a classification system for stages of female-pattern androgenetic alopecia to aid early diagnosis and mentions existing systems for rare male-pattern cases, but reports no new clinical results.
