title: Inhibitory effects of Hoelen extract on melanogenesis in B16/F1 melanoma cells.
abstract: Melanin synthesis is regulated by melanogenic proteins, such as tyrosinase, tyrosinase-related protein 1 (TRP-1) and TRP-2. The effects of Hoelen extract on melanogenesis were investigated in B16Fl murine melanoma cells. Specifically, tyrosinase activity, cell viability and melanin content were assayed, and western blotting and RT-PCR for tyrosinase, TRP-1 and TRP-2 conducted. The results show that Hoelen significantly inhibited melanin synthesis through inhibition of TRP-2 expression, while it did not affect tyrosinase activity or its expression. Taken together, RT-PCR results showed that the depigmentation effect of Hoelen may be due to inhibition of TRP-2 gene transcription. These results suggest that Hoelen may be a useful inhibitor for the attenuation of melanogenesis and hyperpigmentation in skin cells.
authors.affiliation: Department of Prescriptionology, College of Oriental Medicine, Kyung Hee University, 1 Hoegi-dong, Dongdaemun-gu, Seoul 130-701, Republic of Korea.
authors.forename: Mun Seog
authors.initials: MS
authors.lastname: Chang
authors.forename: Moon Jung
authors.initials: MJ
authors.lastname: Choi
authors.forename: Soo Yeon
authors.initials: SY
authors.lastname: Park
authors.forename: Seong Kyu
authors.initials: SK
authors.lastname: Park
mesh_terms: D000818:Animals; D001688:Biological Products / Q000494:pharmacology* / Q000627:therapeutic use; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D005786:Gene Expression Regulation / Q000187:drug effects*; D008543:Melanins / Q000096:biosynthesis*; D008545:Melanoma / Q000188:drug therapy* / Q000378:metabolism; D008562:Membrane Glycoproteins / Q000235:genetics / Q000378:metabolism*; D051379:Mice; D014442:Monophenol Monooxygenase / Q000378:metabolism; D010088:Oxidoreductases / Q000235:genetics / Q000378:metabolism*; D055441:Poria
chemical_list: D001688:Biological Products; D008543:Melanins; D008562:Membrane Glycoproteins; D010088:Oxidoreductases; C079621:Tyrp1 protein, mouse; D014442:Monophenol Monooxygenase