Ming Yan1, Jintao Wu1, Yan Yu2, Yanping Wang3, Lizhe Xie2, Guangdong Zhang1, Jinhua Yu4, Chengfei Zhang5. 1. Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China; Endodontic Department, School of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China. 2. Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China. 3. Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China; Department of Endodontics, Suzhou Stomatological Hospital, Suzhou, Jiangsu, China. 4. Institute of Stomatology, Nanjing Medical University, Nanjing, Jiangsu, China; Department of Endodontics, Suzhou Stomatological Hospital, Suzhou, Jiangsu, China. Electronic address: yuziyi_yjh@hotmail.com. 5. Comprehensive Dental Care, Faculty of Dentistry, University of Hong Kong, Pokfulam, Hong Kong SAR, China.
Abstract
INTRODUCTION: Mineral trioxide aggregate (MTA) has been widely used in clinical apexification and apexogenesis. However, the effects of MTA on the stem cells from apical papilla (SCAPs) and the precise mechanism of apexogenesis have not been elucidated in detail. METHODS: Multiple colony-derived stem cells were isolated from the apical papillae, and the effects of MTA on the proliferation and differentiation of SCAPs were investigated both in vitro and in vivo. Activation of nuclear factor kappa B (NFκB) pathway in MTA-treated SCAPs was analyzed by immunofluorescence assay and Western blot. RESULTS: MTA at the concentration of 2 mg/mL did not affect the proliferation activity of SCAPs. However, 2 mg/mL MTA-treated SCAPs presented the ultrastructural changes, up-regulated alkaline phosphatase, increased calcium deposition, up-regulated expression of odontoblast markers (dentin sialoprotein and dentin sialophosphoprotein) and odonto/osteoblast markers (runt-related transcription factor 2 and osteocalcin), suggesting that MTA enhanced the odonto/osteoblastic differentiation of SCAPs in vitro. In vivo results confirmed that MTA can promote the regular dentinogenesis of SCAPs. Moreover, MTA-treated SCAPs exhibited the up-regulated cytoplasmic phos-IκBα and phos-P65, enhanced nuclear P65, and increased nuclear translocation of P65. When co-treated with BMS345541 (the specific NFκB inhibitor), MTA-mediated odonto/osteoblastic differentiation was significantly attenuated. CONCLUSIONS: MTA at the concentration of 2 mg/mL can improve the odonto/osteogenic capacity of SCAPs via the activation of NFκB pathway.
INTRODUCTION:Mineral trioxide aggregate (MTA) has been widely used in clinical apexification and apexogenesis. However, the effects of MTA on the stem cells from apical papilla (SCAPs) and the precise mechanism of apexogenesis have not been elucidated in detail. METHODS: Multiple colony-derived stem cells were isolated from the apical papillae, and the effects of MTA on the proliferation and differentiation of SCAPs were investigated both in vitro and in vivo. Activation of nuclear factor kappa B (NFκB) pathway in MTA-treated SCAPs was analyzed by immunofluorescence assay and Western blot. RESULTS: MTA at the concentration of 2 mg/mL did not affect the proliferation activity of SCAPs. However, 2 mg/mL MTA-treated SCAPs presented the ultrastructural changes, up-regulated alkaline phosphatase, increased calcium deposition, up-regulated expression of odontoblast markers (dentin sialoprotein and dentin sialophosphoprotein) and odonto/osteoblast markers (runt-related transcription factor 2 and osteocalcin), suggesting that MTA enhanced the odonto/osteoblastic differentiation of SCAPs in vitro. In vivo results confirmed that MTA can promote the regular dentinogenesis of SCAPs. Moreover, MTA-treated SCAPs exhibited the up-regulated cytoplasmic phos-IκBα and phos-P65, enhanced nuclear P65, and increased nuclear translocation of P65. When co-treated with BMS345541 (the specific NFκB inhibitor), MTA-mediated odonto/osteoblastic differentiation was significantly attenuated. CONCLUSIONS: MTA at the concentration of 2 mg/mL can improve the odonto/osteogenic capacity of SCAPs via the activation of NFκB pathway.
Authors: I Vidovic Zdrilic; I O de Azevedo Queiroz; B G Matthews; J E Gomes-Filho; M Mina; I Kalajzic Journal: J Periodontal Res Date: 2017-07-10 Impact factor: 4.419
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