title: Suberoylanilide hydroxamic acid enhances odontoblast differentiation.
abstract: Previous studies have shown that histone deacetylase (HDAC) inhibitors stimulate osteoblast differentiation in vitro and bone formation in vivo. However, the effects of HDAC inhibitors on odontoblasts have not been elucidated. Therefore, in this study, we examined the effect of suberoylanilide hydroxamic acid (SAHA), an HDAC inhibitor, on odontoblast differentiation using an MDPC23 odontoblast-like cell line. SAHA significantly enhanced matrix mineralization and the expression levels of odontoblast marker genes. SAHA increased the expression levels of nuclear factor I/C (Nfic) and dentin sialophosphoprotein (Dspp). Nfic bound directly to the Dspp promoter and stimulated Dspp transcription. SAHA increased both basal and Nfic-induced Dspp promoter activity. SAHA-induced Dspp promoter activity disappeared when mutations were introduced within the Nfic binding element of the Dspp promoter. Nfic knockdown by siRNA blocked SAHA stimulation of Dspp expression. These results indicate that SAHA enhances odontoblast differentiation and that SAHA increases Dspp expression, at least in part, by increasing the expression level of Nfic.
authors.affiliation: Department of Molecular Genetics, School of Dentistry and Dental Research Institute, Seoul National University, 28 Yeongun-dong, Jongno-gu, Seoul 110-749, Republic of Korea.
authors.forename: A
authors.initials: A
authors.lastname: Kwon
authors.forename: H-J
authors.initials: HJ
authors.lastname: Park
authors.forename: K
authors.initials: K
authors.lastname: Baek
authors.forename: H-L
authors.initials: HL
authors.lastname: Lee
authors.forename: J-C
authors.initials: JC
authors.lastname: Park
authors.forename: K M
authors.initials: KM
authors.lastname: Woo
authors.forename: H-M
authors.initials: HM
authors.lastname: Ryoo
authors.forename: J-H
authors.initials: JH
authors.lastname: Baek
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000187:drug effects*; D002460:Cell Line; D016326:Extracellular Matrix Proteins / Q000096:biosynthesis* / Q000235:genetics; D055785:Gene Knockdown Techniques; D056572:Histone Deacetylase Inhibitors / Q000494:pharmacology*; D006655:Histone Deacetylases / Q000378:metabolism; D006877:Hydroxamic Acids / Q000494:pharmacology*; D051379:Mice; D051839:NFI Transcription Factors / Q000235:genetics / Q000378:metabolism; D009804:Odontoblasts / Q000187:drug effects*; D010750:Phosphoproteins / Q000096:biosynthesis* / Q000235:genetics; D011401:Promoter Regions, Genetic; D034741:RNA, Small Interfering / Q000502:physiology; D012795:Sialoglycoproteins / Q000096:biosynthesis* / Q000235:genetics; D015854:Up-Regulation; D000077337:Vorinostat; D000099311:Dentin Sialophosphoprotein
chemical_list: D016326:Extracellular Matrix Proteins; D056572:Histone Deacetylase Inhibitors; D006655:Histone Deacetylases; D006877:Hydroxamic Acids; D051839:NFI Transcription Factors; D010750:Phosphoproteins; D034741:RNA, Small Interfering; D012795:Sialoglycoproteins; D000077337:Vorinostat; D000099311:Dentin Sialophosphoprotein