title: The effect of isosaponarin isolated from wasabi leaf on collagen synthesis in human fibroblasts and its underlying mechanism.
abstract: Wasabi has been used as an important spice in Japanese foods. The wasabi leaves were used as a cosmetic material, but its biological activities have not yet been examined. We investigated the effect of isosaponarin derived from wasabi leaf on collagen synthesis in human fibroblasts. The production of type I collagen in human fibroblasts was increased with treatment of wasabi leaf extract. Isosaponarin isolated from wasabi leaves belonged to the group of flavone glycoside, and was the key compound in collagen synthesis from the wasabi leaf ingredients. Isosaponarin increased the type I collagen production at the mRNA gene level. The treatment of isosaponarin did not influence the production of transforming growth factor-beta (TGF-beta) protein, but increased the production of TGF-beta type II receptor (TbetaR-II) protein and TbetaR-II mRNA. Prolyl 4-hydroxylase (P4H) protein and P4H mRNA were increased by treatment with isosaponarin. Heat shock protein 47 (HSP47) was not increased by treatment with isosaponarin. These results suggested that isosaponarin increased collagen synthesis in human fibroblasts, caused by up-regulated TbetaR-II and P4H production.
authors.affiliation: Kinjirushi Co., Ltd., 2-61 Yahata-hontori, Nakagawa-ku, Nagoya 454-8526, Japan. m-nagai@kinjirushi.co.jp
authors.forename: Masashi
authors.initials: M
authors.lastname: Nagai
authors.forename: Keiko
authors.initials: K
authors.lastname: Akita
authors.forename: Kazuno
authors.initials: K
authors.lastname: Yamada
authors.forename: Isao
authors.initials: I
authors.lastname: Okunishi
mesh_terms: D047310:Apigenin / Q000737:chemistry / Q000494:pharmacology*; D015153:Blotting, Western; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D003094:Collagen / Q000096:biosynthesis*; D024042:Collagen Type I / Q000235:genetics / Q000378:metabolism; D000090602:Collagen Type I, alpha 1 Chain; D004797:Enzyme-Linked Immunosorbent Assay; D005347:Fibroblasts / Q000187:drug effects* / Q000378:metabolism*; D005960:Glucosides / Q000737:chemistry / Q000494:pharmacology*; D050958:HSP47 Heat-Shock Proteins / Q000378:metabolism; D006801:Humans; D018515:Plant Leaves / Q000187:drug effects* / Q000378:metabolism*; D017346:Protein Serine-Threonine Kinases / Q000235:genetics / Q000378:metabolism; D000077294:Receptor, Transforming Growth Factor-beta Type II; D018125:Receptors, Transforming Growth Factor beta / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D016212:Transforming Growth Factor beta / Q000378:metabolism; D031228:Wasabia / Q000737:chemistry*
chemical_list: D024042:Collagen Type I; D000090602:Collagen Type I, alpha 1 Chain; D005960:Glucosides; D050958:HSP47 Heat-Shock Proteins; D018125:Receptors, Transforming Growth Factor beta; D016212:Transforming Growth Factor beta; C457771:saponarin; D047310:Apigenin; D003094:Collagen; D017346:Protein Serine-Threonine Kinases; D000077294:Receptor, Transforming Growth Factor-beta Type II