Priming Effect of Photobiomodulation Therapy on Osteoblastic Differentiation of Mesenchymal Stem Cells from Adipose Tissue: In Vitro Evaluation in a Co-Culture Model

• Grant number: 23/06541-5
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2023
• End date: January 31, 2024
• Field of knowledge: Health Sciences - Dentistry - Oral and Maxillofacial Surgery
• Principal Investigator: Emanuela Prado Ferraz
• Grantee: Yan Pandolfo Torres de Souza
• Host Institution: Faculdade de Odontologia de Ribeirão Preto (FORP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil

Abstract

To enhance the osteoblastic differentiation of mesenchymal stem cells (MSCs) derived from adipose tissue, photobiomodulation (FBM) emerges as a non-invasive therapy that has been related to the acceleration of the repair process. However, the mechanisms by which these effects occur have not been elucidated. We hypothesize that the medium conditioned by MSCs treated with PBM increases osteoblast differentiation. Thus, MSCs derived from rat's adipose tissue will be separately seeded in plates and inserts and cultured in expansion or osteogenic medium, and the cells in the insert will be submitted to PBM (660 nm; 0,14 J; 20 mW; 0,714 W/cm2; 5 J/cm2). Non-irradiated MSCs will be used as control. Cell proliferation and migration, ALP activity and extracellular mineralized matrix production will be evaluated. Data will be compared by appropriate statistical tests with a significance level of 5%. The results of this study will contribute to the understanding of the intracellular mechanisms triggered by FBM and involved with the osteoblastic differentiation of MSCs, optimizing bone repair.