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Effect of Metformin on the Behavior of Dental Pulp Stem Cells Cultured on Freeze-Dried Bone Allografts Publisher Pubmed



Kouhestani F1 ; Rad MR2 ; Mohaghegh S3 ; Motamedian SR4, 5
Authors
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Authors Affiliations
  1. 1. Department of Periodontics, School of Dentistry, Tehran University of Medical Sciences, Iran
  2. 2. Dental Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  3. 3. Undergraduate Student, Student Research Committee, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  4. 4. Dentofacial Deformities Research Center, Research Institute of Dental Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
  5. 5. Department of Orthodontics, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Source: Dental and Medical Problems Published:2021


Abstract

Background. Considering the complications associated with autogenous bone grafting, the use of freeze-dried bone allograft (FDBA) granules may be considered as an alternative treatment plan. Objectives. The aim of this study was to evaluate the effect of metformin on both the proliferation and osteogenic capability of dental pulp stem cells (DPSCs) cultured on FDBA granules. Material and methods. First, a pilot study was conducted only on DPSCs to confirm cellular viability and the osteoinducing effect of 100 μmol/L metformin. Next, the cells were loaded on FDBA granules and treated with and without metformin. Finally, the following analyses were performed: scanning electron microscopy (SEM) (cell attachment); the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay (proliferation); and alkaline phosphatase (ALP) activity analysis (osteogenic differentiation). Results. The SEM images revealed that metformin enhanced the adhesion of DPSCs on FDBA granules. In addition, metformin was shown to increase cell proliferation/viability from day 1 to day 7. Compared to the control, a significant difference was observed after 7 days of treatment. Metformin enhanced the osteogenic capability of FDBA in both standard and osteoinducing conditions. An increase in ALP activity was significant after 7 days of treatment. The positive effect of metformin on differentiation was significant in osteoinducing conditions. Conclusions. Metformin can be applied as an additional osteoinductive factor in bone regeneration treat-ment. Moreover, scaffolds with controlled release of metformin can be considered a proper osteoinductive bone substitute that may lessen the complications related to applying allograft scaffolds alone. © 2021, Wroclaw University of Medicine. All rights reserved.
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