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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Low-intensity laser phototherapy enhances the proliferation of dental pulp stem cells under nutritional deficiency

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Moura-Netto, Cacio [1] ; Ferreira, Leila Soares [2] ; Maranduba, Carlos Magno [3] ; Volpi Mello-Moura, Anna Carolina [2] ; Marques, Marcia Martins [4]
Total Authors: 5
[1] Univ Cruzeiro Sul, Sch Dent, Sao Paulo, SP - Brazil
[2] Univ Ibirapuera, Sch Dent, Sao Paulo, SP - Brazil
[3] Univ Fed Juiz de Fora, Inst Biol Sci, Dept Biol, Juiz De Fora, MG - Brazil
[4] Univ Sao Paulo, Sch Dent, Dept Restorat Dent, Sao Paulo, SP - Brazil
Total Affiliations: 4
Document type: Journal article
Source: Brazilian Oral Research; v. 30, n. 1 2016.
Web of Science Citations: 7

Abstract Dental trauma in immature permanent teeth can damage pulp vascularization, which leads to necrosis and cessation of apexogenesis. Studies on tissue engineering using stem cells from human exfoliated deciduous teeth (SHEDs) have yielded promising results. Laser phototherapy (LPT) is able to influence the proliferation and differentiation of these cells, which could improve tissue engineering. SHEDs (eighth passage) were seeded into 96-well culture plates (103 cells/well) and were grown in culture medium supplemented with 15% defined fetal bovine serum (FBS) for 12 h. After determining the appropriate nutrition deficiency status (5% FBS), the cells were assigned into four groups: 1) G1 – 15% FBS (positive control); 2) G2 – 5% FBS (negative control); 3) G3 – 5% FBS+LPT 3 J/cm2; and 4) G4 – 5% FBS+LPT 5 J/cm2. For the LPT groups, two laser irradiations at 6 h intervals were performed using a continuous wave InGaAlP diode laser (660 nm, with a spot size of 0.028 cm2, 10 mW) in punctual and contact mode. Cell viability was assessed via an MTT reduction assay immediately after the second laser irradiation (0 h) and 24, 48, and 72 h later. We found that G3 and G4 presented a significantly higher cell growth rate when compared with G2 (p < 0.01). Moreover, G4 exhibited a similar cell growth rate as G1 throughout the entire experiment (p > 0.05). These findings indicate that LPT with 5 J/cm2 can enhance the growth of SHEDs during situations of nutritional deficiency. Therefore, LPT could be a valuable adjunct treatment in tissue engineering when using stem cells derived from the dental pulp of primary teeth. (AU)

FAPESP's process: 10/12458-3 - Analysis of the effect of low level laser phototherapy on stem cells derived from human deciduous dental pulp. Part 1: Establishment of cellular grow curves related to the culture medium percentage
Grantee:Francielli Quintela dos Santos
Support Opportunities: Scholarships in Brazil - Scientific Initiation
FAPESP's process: 09/13483-4 - Analysis of the effect of low level laser phototherapy on stem cells derived from human deciduous dental pulp (SHED-LacZ): In vitro and in vivo study of dentin matrix protein production
Grantee:Cacio de Moura Netto
Support Opportunities: Scholarships in Brazil - Post-Doctoral