TY - JOUR
T1 - Effects of enamel matrix derivate on bone-related mRNA expression in human periodontal ligament cells in vitro
AU - Takayanagi, Kazuaki
AU - Osawa, Ginko
AU - Nakaya, Hiroshi
AU - Cochran, David L.
AU - Kamoi, Kyuich
AU - Oates, Thomas W.
PY - 2006/5
Y1 - 2006/5
N2 - Background: Enamel matrix derivative (EMD) has demonstrated the potential to stimulate periodontal regeneration with mineralized tissue formation. Molecular regulators of bone metabolism include osteoprotegrin (OPG), receptor activator of nuclear factor kappa B ligand (RANKL), cyclooxygenase 2 (COX2), and core binding factor alpha 1 (Cbfa1). The role of these regulatory molecules within the context of EMD stimulation of mineralized tissue formation is unknown. Therefore, the purpose of this investigation was to explore the effects of EMD on these bone-related molecules in human periodontal ligament (PDL) cells. Methods: Human PDL-cell cultures were treated with EMD (5 to 100 μg/ ml) for 24 hours. Total RNA was isolated using phenolchloroform, and reverse transcription-polymerase chain reaction (RT-PCR) was performed using primers specific for OPG, RANKL, COX2, Cbfa1, and aldolase, with amplification in the exponential range for each molecule studied. Results: The results of this study show that there is a significant (P <0.05) increase in COX2 mRNA levels with EMD treatment, and no effects were noted on mRNA levels for Cbfa1. RANKL mRNA levels were significantly decreased (P <0.01) up to 50% with EMD treatment ≥25 μg/ml. OPG levels showed minimal effects with EMD treatment. However, the RANKL/OPG ratio showed a 40% to 55% reduction with EMD ≥25 μg/ml. Conclusion: This study supports a role for EMD stimulation of mineralized tissue formation consistent with periodontal regeneration by modulating regulatory molecules critical to bone metabolism at the RNA level.
AB - Background: Enamel matrix derivative (EMD) has demonstrated the potential to stimulate periodontal regeneration with mineralized tissue formation. Molecular regulators of bone metabolism include osteoprotegrin (OPG), receptor activator of nuclear factor kappa B ligand (RANKL), cyclooxygenase 2 (COX2), and core binding factor alpha 1 (Cbfa1). The role of these regulatory molecules within the context of EMD stimulation of mineralized tissue formation is unknown. Therefore, the purpose of this investigation was to explore the effects of EMD on these bone-related molecules in human periodontal ligament (PDL) cells. Methods: Human PDL-cell cultures were treated with EMD (5 to 100 μg/ ml) for 24 hours. Total RNA was isolated using phenolchloroform, and reverse transcription-polymerase chain reaction (RT-PCR) was performed using primers specific for OPG, RANKL, COX2, Cbfa1, and aldolase, with amplification in the exponential range for each molecule studied. Results: The results of this study show that there is a significant (P <0.05) increase in COX2 mRNA levels with EMD treatment, and no effects were noted on mRNA levels for Cbfa1. RANKL mRNA levels were significantly decreased (P <0.01) up to 50% with EMD treatment ≥25 μg/ml. OPG levels showed minimal effects with EMD treatment. However, the RANKL/OPG ratio showed a 40% to 55% reduction with EMD ≥25 μg/ml. Conclusion: This study supports a role for EMD stimulation of mineralized tissue formation consistent with periodontal regeneration by modulating regulatory molecules critical to bone metabolism at the RNA level.
KW - Core binding factor alpha 1
KW - Cyclooxygenase 2
KW - Osteoprotegerin
KW - Periodontal ligament
KW - Receptor activator of nuclear factor B ligand
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U2 - 10.1902/jop.2006.050244
DO - 10.1902/jop.2006.050244
M3 - Article
C2 - 16671883
AN - SCOPUS:33746025298
SN - 0022-3492
VL - 77
SP - 891
EP - 898
JO - Journal of periodontology
JF - Journal of periodontology
IS - 5
ER -