1995
DOI: 10.1006/bbrc.1995.2067
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Androgen Induction of Follicular Epithelial Cell Growth Is Mediated via Insulin-like Growth Factor-I from Dermal Papilla Cells

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Cited by 172 publications
(120 citation statements)
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“…beard) whilst inhibiting others, as in male pattern baldness, altering the production of regulatory factors. Dermal papilla cells have been shown to secrete extracellular matrix components and mitogenic factors in culture , Itami et al 1995 and, very recently, it has been reported that androgens inhibit the production of mitogenic factors by cultured human balding scalp dermal papilla cells and those of the macaque , Obana & Uno 1996. Further investigations using this model system should contribute to our understanding of the mechanisms of androgen action in androgenetic alopecia, and should lead, hopefully, to better treatments for this condition.…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…beard) whilst inhibiting others, as in male pattern baldness, altering the production of regulatory factors. Dermal papilla cells have been shown to secrete extracellular matrix components and mitogenic factors in culture , Itami et al 1995 and, very recently, it has been reported that androgens inhibit the production of mitogenic factors by cultured human balding scalp dermal papilla cells and those of the macaque , Obana & Uno 1996. Further investigations using this model system should contribute to our understanding of the mechanisms of androgen action in androgenetic alopecia, and should lead, hopefully, to better treatments for this condition.…”
Section: Discussionmentioning
confidence: 99%
“…The culture of dermal papilla cells from the larger non-balding scalp and body hair follicles is well established (Messenger 1984) and they appear to offer a useful model for studying the action of androgens. Dermal papilla cells in vitro have been shown to retain their in vivo inductive properties (Reynolds & Jahoda 1991) and to display properties which are dependent on their in vivo sensitivities to androgens (Itami et al 1991, Randall et al 1992, Thornton et al 1993, Itami et al 1995. The correlation between the patterns of testosterone metabolism by dermal papilla cells derived from beard, scalp, pubic and axillary hair follicles (Itami et al 1991, Thornton et al 1993 and hair growth in 5 -reductase deficiency syndromes (ImperatoMcGuinley et al 1991) strongly supports the hypothesis that androgens act via the dermal papilla.…”
Section: Introductionmentioning
confidence: 89%
“…The relationship between insulin resistance and IH is not explained well. One explanation for this association might be stimulating effect of insulin/insulin-like growth factor (IGF) system on hair follicle growth [24]. Phillot et al [25] also demonstrated that insulin/IGF system in vitro has a role on hair follicle growth.…”
Section: Isi Homamentioning
confidence: 99%
“…In this model, androgens act directly on DP cells where they bind to androgen receptors and then initiate altered gene expression of regulatory factors modulating indirectly the period of time when hair is growing, size and activity of the DP, keratinocytes and melanocytes. The factors produced by these populations may be soluble paracrine factors and/or extracellular matrix factors, including insulin-like growth factor-1 (IGF-1) in growth stimulation [105], stem cell factor in altered pigmentation [102] and transforming growth factor-b [106,107] and dickkopf 1 [108] in inhibition. The opposite effects of androgens on beard and scalp follicles probably reflect differences in androgen receptor content, which is higher in beard DP than in occipital hair DP [109] and/or 5a-reductase activity, which is higher in beard than in scalp [110].…”
Section: Molecular Control Of Hair Follicle Development and Cyclingmentioning
confidence: 99%