RESUMEN
The aim of this study was to evaluate the antiproliferative properties of low-level laser therapy (LLLT) on gingival fibroblasts obtained from calcium channel blocker-induced gingival overgrowth (GO). Gingival fibroblasts of patients with GO were compared to healthy gingival fibroblasts (H). Both cells were exposed to LLLT (685 nm wavelength, 25mW power, diode laser) and compared to those not treated with LLLT. Cell proliferation and viability were measured with MTT assay at baseline and after 24 and 72 h. TGF-ß1, CTGF, and collagen Type 1 levels were evaluated with Enzyme-Linked Immunosorbent Assay (ELISA). LLLT significantly decreased the proliferation of GO fibroblasts (p < 0.05) while leading to a significantly higher proliferation in H fibroblasts compared to the untreated cells (p < 0.05). GO cells showed significantly higher CTGF, TGF-ß, and collagen Type 1 expression than the H cells (p < 0.05). LLLT significantly reduced CTGF levels in GO cells compared to the control group (p < 0.05). In H cells, CTGF and TGF-ß levels were also significantly decreased in response to LLLT compared to the control group (p < 0.05). While LLLT significantly reduced collagen expression in the H group (p < 0.05), it did not significantly impact the GO cells. LLLT significantly reduced the synthesis of the growth factors and collagen in both groups with an antiproliferative effect on the gingival fibroblasts from calcium channel blocker-induced GO, suggesting that it can offer a therapeutic approach in the clinical management of drug-induced GO, reversing the fibrotic changes.
Asunto(s)
Bloqueadores de los Canales de Calcio , Proliferación Celular , Factor de Crecimiento del Tejido Conjuntivo , Fibroblastos , Encía , Sobrecrecimiento Gingival , Terapia por Luz de Baja Intensidad , Humanos , Fibroblastos/efectos de la radiación , Fibroblastos/efectos de los fármacos , Terapia por Luz de Baja Intensidad/métodos , Sobrecrecimiento Gingival/inducido químicamente , Sobrecrecimiento Gingival/radioterapia , Sobrecrecimiento Gingival/terapia , Bloqueadores de los Canales de Calcio/farmacología , Proliferación Celular/efectos de la radiación , Proliferación Celular/efectos de los fármacos , Encía/efectos de la radiación , Encía/citología , Factor de Crecimiento del Tejido Conjuntivo/metabolismo , Células Cultivadas , Colágeno Tipo I/metabolismo , Factor de Crecimiento Transformador beta1/metabolismo , Supervivencia Celular/efectos de la radiación , Supervivencia Celular/efectos de los fármacos , Láseres de Semiconductores/uso terapéutico , Masculino , Adulto , FemeninoRESUMEN
AIM: Resveratrol is a natural polyphenolic compound with biological activities such as anti-inflammation and antioxidation. Its anti-fibrotic effect has been experimentally demonstrated in the pancreas and liver. This study aims to determine the anti-proliferative effect of resveratrol on fibroblasts obtained from hyperplastic gingival tissues from a patient diagnosed with Juvenile Hyaline Fibromatosis (JHF). MATERIALS AND METHODS: Primary gingival fibroblast cell lines were obtained from gingival growth tissues by the gingivectomy of a patient with JHF. Gingival fibroblasts were treated with or without 3 different doses of resveratrol (50, 100, 200 µM). Cytotoxicity and cell proliferation were evaluated after 24, 48, and 72 h. Collagen, TGF, and CTGF were analyzed by ELISA in the 48-hour supernatants. RESULTS: All three doses of resveratrol suppressed the proliferation of JHF gingival fibroblasts at 24 and 48 h without showing any cytotoxic effect compared to the control group (p < 0.0001). At 72 h, 100 and 200 µM resveratrol showed significantly less proliferation (p < 0.0001), less collagen, CTGF, and TGF- ß (p < 0.001) than the control group. CONCLUSION: Resveratrol had a profound anti-proliferative effect on gingival fibroblasts obtained from gingival enlargements with JHF, suggesting that it can be used as a therapeutic to prevent excessive cell growth by suppressing collagen, CTGF, and TGF- ß synthesis in the pathogenesis of hyperplasia.