Curcumin Enhances the Reduction of Keloid Fibroblast Viability Induced by Blue Light
Abstract
Objective: This study aims to determine the effects of blue light or curcumin alone and its combination on keloid fibroblast viability.
Material and Methods: Human keloid fibroblasts were divided into different groups: untreated controls, blue light irradiation at 30 J/cm², curcumin treatment (1.25, 2.5, 5, 10, and 20 µg/mL), and curcumin combined with blue light.
Results: Cell viability was assessed using an 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, and curcumin’s half-maximal inhibitory concentration (IC50) was calculated through regression analysis. Blue light at 30 J/cm2 significantly reduced keloid fibroblast viability to 61.99%, while curcumin at 20 µg/mL decreased viability to 72.01%. When combined with blue light, curcumin exhibited a dose-dependent effect: 5 µg/mL of curcumin reduced viability to 36.51%. In contrast, 10 and 20 µg/mL decreased viability to 15.94% and 15.85%, respectively—significantly greater reductions than curcumin alone. Blue light enhanced curcumin’s effects, lowering its IC50 from 30.95 µg/mL to 3.86 µg/mL.
Conclusion: The combination of blue light and curcumin demonstrated synergistic effects, achieving greater reductions in keloid fibroblast viability compared to either treatment alone.
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