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Effect of Photobiomodulation Therapy on Tgf-Β Release From Dentin, Migration and Viability of Dental Pulp Stem Cells in Regenerative Endodontics Treatment: An Ex Vivo Study Publisher Pubmed



Malekpour F1 ; Bahrami R2 ; Hodjat M3 ; Hakimiha N4 ; Bolhari B1 ; Sooratgar A1 ; Niavarzi S1
Authors
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Authors Affiliations
  1. 1. Department of Endodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Orthodontics, School of Dentistry, Guilan University of Medical Sciences, Rasht, Iran
  3. 3. Dental Research Centre, Dentistry Research Institute, Tehran University of Medical Science, Tehran, Iran
  4. 4. Laser Application in Medical Sciences Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran

Source: Journal of Photochemistry and Photobiology B: Biology Published:2024


Abstract

Background and aim: Regenerative endodontic procedures (REPs) are oriented by the principles of tissue engineering, incorporating dental pulp stem cells (DPSC), crucial growth factors like Transforming growth factor-β (TGF-β1), and scaffolds to facilitate the regeneration of dental pulp tissues. The present study aimed to investigate the effect of photobiomodulation (PBM) therapy, using an 808 nm diode laser on cellular modulation mechanisms in REPs. Method and material: A total of 108 human dentin discs obtained from intact single root teeth were randomly assigned into six groups (n = 8): 1. Positive control (EDTA), 2. PBM-1 (3 J/cm2), 3. PBM-2 (5 J/cm2), 4. EDTA+PBM-1, 5. EDTA+PBM-2, and 6. Negative control (NaOCl). Then, an extract solution was prepared from each disc and the concentration of released TGF-β1 from the discs was measured using enzyme-linked immunosorbent assay (ELISA). Moreover, the extract solution was added to DPSC culture medium to evaluate cell viability and migration through MTT assay and scratch test, respectively. Result: The group exposed to PBM-1 showed the highest cell viability, while treatment with EDTA and EDTA+PBM-2 decreased cellular viability. Also, the PBM-treated groups showed significantly higher release of TGF-β1 compared to the negative control. EDTA and EDTA+PBM-1 showed the highest release among all the groups. No significant difference was found between EDTA and EDTA+PBM-1, as well as between PBM-1 and PBM-2. Moreover, the PBM-1 group exhibited the highest migration after 24 h, which was significantly greater than other groups, except for the PBM-2 group. Conclusion: According to the obtained data, 808 nm mediated-PBM (3 J/cm2), both independently and in conjunction with EDTA, enhanced the release of TGF-β1 from dentin and improved cell viability and migration of DPSCs. It seems that, PBM under the specific parameters employed in this study, could be an effective adjunctive therapy in REPs. © 2023
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