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Effects of Mineral Trioxide Aggregate on Cell Survival, Gene Expression Associated with Mineralized Tissues, and Biomineralization of Cementoblasts
Scopus
Toplam 115 atıf DOI
The purpose of this study was to investigate the effects of mineral trioxide aggregate (MTA) on survival, mineralization, and expression of mineralization-related genes of cementoblasts. Immortalized cementoblasts (OCCM) were maintained with Dulbecco modified Eagle medium containing 10% fetal bovine serum. Methyl-thiazol-diphenyl-tetrazolium experiments were performed at 24 and 72 hours to evaluate bioactive components released by MTA (0.002-20 mg/mL) on the cell survival of OCCM. Von Kossa staining was used to evaluate biomineralization of OCCM cells. Images of cementoblasts were taken on day 3 by using inverted microscopy. Gene transcripts for bone sialoprotein (BSP), OCN, collagen type I (COL I), and osteopontin (OPN) were evaluated on days 3 and 5 by using semiquantitative reverse transcriptase polymerase chain reaction. The 20 mg/mL concentration of MTA was toxic for OCCM cells, whereas other concentrations of MTA tested exhibited similar cell numbers when compared with control group, and the 0.02 mg/mL concentration of MTA increased OCCM cell survival at 72 hours. Although an apparent decrease in mineralization was observed in the highest 3 concentrations of MTA used, 0.02 and 0.002 mg/mL concentrations of MTA induced greater biomineralization of OCCM cells than seen in the control. Moreover, increased BSP and COL I mRNA expression was observed at 0.02 and 0.002 mg/mL concentrations of MTA. MTA did not have a negative effect on the viability and morphology of cementoblasts and induced biomineralization of cementoblasts at the concentrations of 0.02 and 0.002 mg/mL. Based on these results MTA can be considered as a favorable material regarding cell-material interaction. © 2009 American Association of Endodontists.
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Boron regulates mineralized tissue-associated proteins in osteoblasts (MC3T3-E1)
Scopus
Havuzumuzda 244 atıf almış
The aim of this study was to determine the effects of boron (B) on the cell-survival, proliferation, mineralization and mRNA expression of mineralized tissue-associated proteins. Additionally, determination of the effects of B on the BMP-4, -6 and -7 protein levels of pre-osteoblastic cells (MC3T3-E1) was also intended. The effects of B (pH 7.0) concentrations (0, 0.1, 1, 10, 100, 1000, 2000, 4000, 8000 and 10,000. ng/ml) on the survival of the cells were evaluated at 24 and 96. hrs with MTT assay. To evaluate the proliferation in long term, MC3T3-E1 cells were treated with different concentrations of B (0, 0.1, 1, 10, 100 and 1000. ng/ml) and were counted on days 2, 5, and 14. While in short term, decreased cell survival rate was observed at 1000. ng/ml and above, at long term no statistically significant difference was detected in different B concentrations applied. Slight decreases at the proliferation of the B-treated groups were determined on days 5 and 14 but one-way analysis of variance revealed that the difference was statistically insignificant. In mineralization assay, increased mineralized nodules were apparently observed in B treatment (1 and 10. ng/ml concentrations) groups. Based on quantitative RT-PCR results, remarkable regulation in favor of osteoblastic function for Collagen type I (COL I), Osteopontin (OPN), Bone Sialoprotein (BSP), Osteocalcin (OCN) and RunX2 mRNA expressions were observed in B treatment groups in comparison with untreated control groups. Increased BMP-4, -6 and -7 protein levels were detected at 0.1, 1, 10 and 100. ng/ml B concentrations. Results of the study suggest that at the molecular level B displays important roles on bone metabolism and may find novel usages at the regenerative medicine. © 2010 Elsevier GmbH.
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Kurumlar (1)
Selçuk Üniversitesi
Selçuklu, Turkey