Bone Morphogenetic Protein-7 Enhances Cementoblast Function In Vitro
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Date
2010
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley
Access Rights
info:eu-repo/semantics/openAccess
Abstract
Background: Bone morphogenetic protein (BMP)-7 is a potent bone-inducing factor and was shown to promote periodontal regeneration in vivo and in vitro; however, to our knowledge, the specific effect of BMP-7 on cementoblasts has not been defined. We aimed to investigate the effects of BMP-7 on cementoblasts, which are cells responsible for tooth root-cementum formation. We hypothesized that BMP-7 would regulate mineralized tissue-associated genes in cementoblasts and influence the expression profile of genes associated with cementoblast extracellular matrix (ECM) and cell adhesion molecules (CAMs). Methods: A murine immortalized cementoblast cell line (OCCM.30) was cultured with and without 50 ng/ml BMP-7. After 72 hours, total RNA was isolated, and mRNA levels for bone/cementum markers, including bone sialoprotein (BSP), osteocalcin (OCN), osteopontin (OPN), and runt-related transcription factor-2 (Runx2), were investigated by real-time quantitative reverse transcription-polymerase chain reaction (Q-PCR). In vitro mineral nodule formation was assayed on day 8 using von Kossa staining. A pathway-specific gene-expression array was used to determine BMP-7-responsive ECM and CAM genes in cementoblasts. Results: Mineralized tissue markers were strongly regulated by BMP-7, with an almost three-fold increase in BSP and OCN transcripts and significant increases in OPN and Runx2 mRNA expressions. BMP-7 treatment markedly stimulated cementoblast-mediated biomineralization in vitro compared to untreated cells at day 8. BMP-7 treatment altered the OCCM.30 expression profile for ECM and CAM functional gene groups. BMP-7 tended to increase the expression of collagens and matrix metalloproteinases (MMPs), mildly decreased tissue inhibitors of MMPs (TIMPs), and had mixed regulatory effects on integrins. Using Q-PCR, selected array results were confirmed, including a significant BMP-7-induced increase in MMP-3 and a decrease in TIMP-2 mRNA expression. Conclusion: These results support the promising applications of BMP-7 in therapies aimed at regenerating periodontal tissues lost as a consequence of disease.
Description
Keywords
Bone morphogenetic protein 7, Collagen, Dental cementum, Extracellular matrix, Matrix metalloproteinases, Regeneration
Journal or Series
Journal of Periodontology
WoS Q Value
Q1
Scopus Q Value
Q1
Volume
81
Issue
11
Citation
Hakkı, S. S., Foster, B. L., Nagatomo, K. J., Bozkurt, S. B., Hakkı, E. E., Somerman, M. J., Nohutcu, R. M., (2010). Bone Morphogenetic Protein-7 Enhances Cementoblast Function In Vitro. Journal of Periodontology, 81(11), 1663-1674. Doi: 10.1902/jop.2010.100074
