title: 4-Methylumbelliferone induces the expression of membrane type 1-matrix metalloproteinase in cultured human skin fibroblasts.
abstract: Human skin fibroblasts were cultured in the presence of 4-methylumbelliferone, an inhibitor of hyaluronan synthesis. Gelatinolytic activity excreted in the medium was examined by zymography and gelatinase assay using a fluorogenic substrate. 4-Methylumbelliferone added to the medium activated the latent form of matrix metalloproteinase-2 in a dose- and time-dependent manner. Immunoblot analysis also showed the conversion of the latent form of matrix metalloproteinase-2 to its active form. This activation was observed even when the cells were cultured with both 4-methylumbelliferone and hyaluronan. Addition of Streptomyces hyaluronidase to the medium during cultivation did not activate the latent form of matrix metalloproteinase-2. Reverse transcription-polymerase chain reaction revealed that 4-methylumbelliferone markedly increased the level of mRNA for membrane type 1-matrix metalloproteinase, whereas levels of mRNA for matrix metalloproteinase-2 and tissue inhibitor of metalloproteinase-2 were little affected. These results suggest that 4-methylumbelliferone induces the expression of membrane type 1-matrix metalloproteinase, resulting in activation of matrix metalloproteinase-2, in cultured human skin fibroblasts.
authors.affiliation: Department of Medical Technology, Hirosaki University School of Health Sciences, Hirosaki, Japan. toshiyan@cc.hirosaki-u.ac.jp
authors.forename: Toshiya
authors.initials: T
authors.lastname: Nakamura
authors.forename: Takashi
authors.initials: T
authors.lastname: Ishikawa
authors.forename: Naoki
authors.initials: N
authors.lastname: Nanashima
authors.forename: Tomisato
authors.initials: T
authors.lastname: Miura
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Nozaka
authors.forename: Rie
authors.initials: R
authors.lastname: Nakaoka
authors.forename: Tatsusuke
authors.initials: T
authors.lastname: Sato
mesh_terms: D001483:Base Sequence; D002478:Cells, Cultured; D004789:Enzyme Activation / Q000187:drug effects; D004790:Enzyme Induction / Q000187:drug effects; D004792:Enzyme Precursors / Q000378:metabolism; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism; D018093:Gelatinases / Q000378:metabolism; D015870:Gene Expression / Q000187:drug effects; D006801:Humans; D006820:Hyaluronic Acid / Q000494:pharmacology; D006923:Hymecromone / Q000494:pharmacology*; D020778:Matrix Metalloproteinase 2 / Q000235:genetics / Q000378:metabolism; D053504:Matrix Metalloproteinases, Membrane-Associated; D008666:Metalloendopeptidases / Q000096:biosynthesis / Q000235:genetics* / Q000378:metabolism; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012867:Skin / Q000187:drug effects / Q000378:metabolism; D019716:Tissue Inhibitor of Metalloproteinase-2 / Q000235:genetics / Q000378:metabolism
chemical_list: D004792:Enzyme Precursors; D012333:RNA, Messenger; D019716:Tissue Inhibitor of Metalloproteinase-2; D006923:Hymecromone; D006820:Hyaluronic Acid; D018093:Gelatinases; D053504:Matrix Metalloproteinases, Membrane-Associated; D008666:Metalloendopeptidases; C069860:progelatinase; D020778:Matrix Metalloproteinase 2