OBJECTIVE: It was the aim of the present study to evaluate whether the laser irradiation of osteoblasts could enhance the release of growth factors including basic fibroblast growth factor (bFGF), insulin-like growth factor-I (IGF-I), and receptor of IGF-I (IGFBP3). BACKGROUND DATA: Low-level laser therapy (LLLT) has been shown to have biostimulatory effects on various cell types by enhancing production of some cytokines and growth factors. MATERIALS AND METHODS: Human mesenchymal stem cells (MSCs) were seeded in osteogenic medium and differentiated into osteoblasts. Three groups were formed: in the first group (single dose group), osteoblasts were irradiated with laser (685 nm, 25 mW, 14.3 mW/cm(2), 140 sec, 2 J/cm(2)) for one time; and in the second group, energy at the same dose was applied for 2 consecutive days (double dose group). The third group was not irradiated with laser and served as the control group. Proliferation, viability, bFGF, IGF-I, and IGFBP3 levels were compared between groups. RESULTS: Both of the irradiated groups revealed higher proliferation, viability, bFGF, IGF-I, and IGFBP3 expressions than did the nonirradiated control group. There was increase in bFGF and IGF-I expressions and decrease in IGFBP3 in the double dose group compared to single dose group. CONCLUSIONS: The results of the present study indicate that LLLT increases the proliferation of osteoblast cells and stimulates the release of bFGF, IGF-I, and IGFBP3 from these cells. The biostimulatory effect of LLLT may be related to the enhanced production of the growth factors.
OBJECTIVE: It was the aim of the present study to evaluate whether the laser irradiation of osteoblasts could enhance the release of growth factors including basic fibroblast growth factor (bFGF), insulin-like growth factor-I (IGF-I), and receptor of IGF-I (IGFBP3). BACKGROUND DATA: Low-level laser therapy (LLLT) has been shown to have biostimulatory effects on various cell types by enhancing production of some cytokines and growth factors. MATERIALS AND METHODS:Human mesenchymal stem cells (MSCs) were seeded in osteogenic medium and differentiated into osteoblasts. Three groups were formed: in the first group (single dose group), osteoblasts were irradiated with laser (685 nm, 25 mW, 14.3 mW/cm(2), 140 sec, 2 J/cm(2)) for one time; and in the second group, energy at the same dose was applied for 2 consecutive days (double dose group). The third group was not irradiated with laser and served as the control group. Proliferation, viability, bFGF, IGF-I, and IGFBP3 levels were compared between groups. RESULTS: Both of the irradiated groups revealed higher proliferation, viability, bFGF, IGF-I, and IGFBP3 expressions than did the nonirradiated control group. There was increase in bFGF and IGF-I expressions and decrease in IGFBP3 in the double dose group compared to single dose group. CONCLUSIONS: The results of the present study indicate that LLLT increases the proliferation of osteoblast cells and stimulates the release of bFGF, IGF-I, and IGFBP3 from these cells. The biostimulatory effect of LLLT may be related to the enhanced production of the growth factors.
Authors: Rosa Medina-Huertas; Francisco Javier Manzano-Moreno; Elvira De Luna-Bertos; Javier Ramos-Torrecillas; Olga García-Martínez; Concepción Ruiz Journal: Lasers Med Sci Date: 2014-03-12 Impact factor: 3.161
Authors: Joel B Epstein; Paul Y Song; Allen S Ho; Babak Larian; Arash Asher; Rene-Jean Bensadoun Journal: Support Care Cancer Date: 2016-12-17 Impact factor: 3.603
Authors: Águida Cristina Gomes Henriques; Fernanda Ginani; Ruth Medeiros Oliveira; Tatjana Souza Lima Keesen; Carlos Augusto Galvão Barboza; Hugo Alexandre Oliveira Rocha; Jurema Freire Lisboa de Castro; Ricardo Della Coletta; Roseana de Almeida Freitas Journal: Lasers Med Sci Date: 2014-02-14 Impact factor: 3.161
Authors: Hasan Gündoğar; Süleyman Ziya Şenyurt; Kamile Erciyas; Mehmet Yalım; Kemal Üstün Journal: Lasers Med Sci Date: 2016-08-14 Impact factor: 3.161