title: Hair-Loss Preventing Effect of Grateloupia elliptica.
abstract: This study was conducted to evaluate the effect of Grateloupia elliptica, a seaweed native to Jeju Island, Korea, on the prevention of hair loss. When immortalized rat vibrissa dermal papilla cells were treated with extract of G. elliptica, the proliferation of dermal papilla cells significantly increased. In addition, the G. elliptica extract significantly inhibited the activity of 5α-reductase, which converts testosterone to dihydrotestosterone (DHT), a main cause of androgenetic alopecia. On the other hand, the G. elliptica extract promoted PGE2 production in HaCaT cells in a dose-dependent manner. The G. elliptica extract exhibited particularly high inhibitory effect on LPS-stimulated IL-12, IL-6, and TNF-α production in lipopolysaccharide (LPS)-stimulated bone marrow-derived dendritic cells. The G. elliptica extract also showed inhibitory activity against Pityrosporum ovale, a main cause of dandruff. These results suggest that G. elliptica extract has the potential to treat alopecia via the proliferation of dermal papilla, 5α-reductase inhibition, increase of PGE2 production, decrease of LPS-stimulated pro-inflammatory cytokines and inhibitory activity against Pityrosporum ovale.
authors.affiliation: Department of Medicine, School of Medicine, Institute of Medical Sciences, Jeju National University, Jeju 690-756.
authors.forename: Jung-Il
authors.initials: JI
authors.lastname: Kang
authors.forename: Sang-Cheol
authors.initials: SC
authors.lastname: Kim
authors.forename: Sang-Chul
authors.initials: SC
authors.lastname: Han
authors.forename: Hye-Jin
authors.initials: HJ
authors.lastname: Hong
authors.forename: You-Jin
authors.initials: YJ
authors.lastname: Jeon
authors.forename: Bora
authors.initials: B
authors.lastname: Kim
authors.forename: Young-Sang
authors.initials: YS
authors.lastname: Koh
authors.forename: Eun-Sook
authors.initials: ES
authors.lastname: Yoo
authors.forename: Hee-Kyoung
authors.initials: HK
authors.lastname: Kang
keywords: 5α-reductase; Dermal papilla cell; Grateloupia elliptica; LPS-stimulated pro-inflammatory cytokine; PGE2; Pityrosporum ovale; Prevention of hair loss