Itami, 1995 (androgens trigger insulin-like growth factor?)

Itami, 1995

Title: Androgen induction of follicular epithelial cell growth is mediated via insulin-like growth factor-I from dermal papilla cells.

Authors: Itami S, Kurata S, Takayasu S

Journal: Biochem Biophys Res Commun 1995 Jul 26;212(3):988-94

PMID: 7626139, UI: 95352126

Affiliated institution: Department of Dermatology, Oita Medical University, Japan.

Cited in: Solomon

Androgen significantly stimulates the proliferation of outer root sheath cells that are cocultured with beard dermal papilla cells without cell contact. The expression of insulin-like growth factor I (IGF-I) mRNA in beard dermal papilla cells was stimulated by androgen and antagonized by cyproterone acetate. Outer root sheath cells did not express mRNA for IGF-I either in the presence or absence of androgen. Both of these two types of cells expressed mRNA for IGF-I receptor and the expression was not affected by androgen. Neutralizing antibody against IGF-I antagonized the stimulatory effect of androgen on the growth of outer root sheath cell cocultured with beard dermal papilla cells. These findings suggest that IGF-I is a candidate for androgen induced hair growth factors.