title: Micromolar Levels of Sodium Fluoride Promote Osteoblast Differentiation Through Runx2 Signaling.
abstract: Bone remodeling is a vital physiological process of healthy bone tissue in humans. Imbalances in this vital process lead to pathological conditions, including periodontal diseases. In this study, we characterized the effects of micromolar levels of NaF on the proliferation and osteogenic differentiation of MC3T3-E1 osteoblastic cells. NaF significantly enhanced the proliferation, alkaline phosphatase (ALP) activity, and mineralization of MC3T3-E1 cells. Quantitative real-time PCR analysis revealed that the expression of mRNAs encoding runt-related transcription factor 2 (Runx2), Osterix, Osteopontin and Osteocalcin was up-regulated in NaF-treated MC3T3-E1 cells compared with untreated controls. Western blot analysis demonstrated that Runx2 and Osterix were inhibited by Runx2 siRNA but were re-activated by treatment with NaF. Furthermore, in vivo evidence indicated that NaF protects against Porphyromonas gingivalis-induced periodontal inflammation and alveolar bone loss in a P. gingivalis-challenged experimental periodontitis animal model. These data suggest that NaF promotes the osteoblastic differentiation of MC3T3-E1 cells through the Runx2/Osterix pathway and may be effective for the treatment of bone-related disorders.
authors.affiliation: Department of Renascent Dentistry, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakae-cho Nishi, Matsudo, Chiba, 271-8587, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Lee
authors.affiliation: Department of Preventive and Public Oral Health, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakae-cho Nishi, Matsudo, Chiba, 271-8587, Japan. arikawa.kazumune@nihon-u.ac.jp.|Research Institute of Oral Health, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakae-cho Nishi, Matsudo, Chiba, 271-8587, Japan. arikawa.kazumune@nihon-u.ac.jp.
authors.forename: Kazumune
authors.initials: K
authors.lastname: Arikawa
authors.affiliation: Department of Renascent Dentistry, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakae-cho Nishi, Matsudo, Chiba, 271-8587, Japan.|Research Institute of Oral Health, Nihon University School of Dentistry at Matsudo, 2-870-1 Sakae-cho Nishi, Matsudo, Chiba, 271-8587, Japan.
authors.forename: Fumio
authors.initials: F
authors.lastname: Nagahama
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000096:biosynthesis; D002454:Cell Differentiation / Q000187:drug effects*; D002460:Cell Line; D050659:Core Binding Factor Alpha 1 Subunit / Q000378:metabolism*; D051379:Mice; D010006:Osteoblasts / Q000166:cytology / Q000378:metabolism*; D015398:Signal Transduction / Q000187:drug effects*; D012969:Sodium Fluoride / Q000494:pharmacology*
chemical_list: D000943:Antigens, Differentiation; D050659:Core Binding Factor Alpha 1 Subunit; C493716:Runx2 protein, mouse; D012969:Sodium Fluoride
keywords: Fluoride; Osteoblast; Osterix; Periodontal inflammation; Runx2