title: Inhibition of the proliferation of human periodontal ligament fibroblasts by hyaluronidase.
abstract: Hyaluronan (HA) exists in various living tissues as one of the major matrix macromolecules, and is well known to play an integral role in cell differentiation and proliferation. The present study was conducted to elucidate whether or not the proliferation of periodontal ligament (PDL) cells are affected specifically by the degradation of HA by hyaluronidasze (HAase). Human PDL fibroblasts were isolated and cultured with and without 15-150U/ml bovine testicular HAase from 1 to 11 days after seeding. The cells were also cultured with anti-CD44 antibody of 2 microg/ml. For the control against the anti-CD44 antibody treatment, 2 microg/ml IgG was used. The HA-dependent pericellular matrix was visualized by particle-exclusion assay. The number of cells was counted by MTT assay during the proliferation. The mRNA levels of HA synthases (HASs), HAases (HYALs) and CD44s were examined by a quantitative real-time PCR analysis. The cell proliferation was inhibited by the treatment with HAase and anti-CD44 antibody in cultured PDL fibroblasts. HASs mRNAs were down-regulated, whereas HYALs mRNAs were up-regulated significantly by the treatment with HAase and anti-CD44 antibody. The CD44s mRNA level exhibited no significant changes. These results suggest that HA may contribute to modulate the proliferation of cultured human PDL cells through a CD44-mediated mechanism.
authors.affiliation: Department of Orthodontics and Craniofacial Developmental Biology, Hiroshima University Graduate School of Biomedical Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8553, Japan. tkotaro@hiroshima-u.ac.jp
authors.forename: Kotaro
authors.initials: K
authors.lastname: Tanimoto
authors.forename: Yuki
authors.initials: Y
authors.lastname: Nakatani
authors.forename: Nobuaki
authors.initials: N
authors.lastname: Tanaka
authors.forename: Masashi
authors.initials: M
authors.lastname: Ueki
authors.forename: Tamami
authors.initials: T
authors.lastname: Yanagida
authors.forename: Reiko
authors.initials: R
authors.lastname: Kitamura
authors.forename: Yuki
authors.initials: Y
authors.lastname: Tanne
authors.forename: Yu Yu
authors.initials: YY
authors.lastname: Lin
authors.forename: Ryo
authors.initials: R
authors.lastname: Kunimatsu
authors.forename: Kazuo
authors.initials: K
authors.lastname: Tanne
mesh_terms: D000911:Antibodies, Monoclonal / Q000378:metabolism; D001667:Binding, Competitive; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D005347:Fibroblasts / Q000166:cytology / Q000187:drug effects / Q000378:metabolism; D005786:Gene Expression Regulation / Q000187:drug effects; D014453:Glucuronosyltransferase / Q000096:biosynthesis / Q000235:genetics; D006801:Humans; D018960:Hyaluronan Receptors / Q000096:biosynthesis / Q000235:genetics / Q000276:immunology; D000076002:Hyaluronan Synthases; D006821:Hyaluronoglucosaminidase / Q000096:biosynthesis / Q000235:genetics / Q000494:pharmacology*; D010513:Periodontal Ligament / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D016133:Polymerase Chain Reaction / Q000379:methods; D012333:RNA, Messenger / Q000235:genetics
chemical_list: D000911:Antibodies, Monoclonal; C497483:CD44 protein, human; D018960:Hyaluronan Receptors; D012333:RNA, Messenger; D014453:Glucuronosyltransferase; D000076002:Hyaluronan Synthases; D006821:Hyaluronoglucosaminidase