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. Author manuscript; available in PMC: 2019 Nov 1.
Published in final edited form as: J Photochem Photobiol B. 2018 Sep 6;188:60–68. doi: 10.1016/j.jphotobiol.2018.09.004

Fig. 2.

Fig. 2.

Quantification of oxidative stress in dermal fibroblasts: Production of Reactive Oxygen Species (ROS) in dermal fibroblasts using lasers λ = 636 nm (A) and λ = 825 nm (B). Intracellular ROS is expressed in arbitrary units I = (It-Io)/Io on Y-axes, where It and Io are the mean fluorescence intensities of the treated group and untreated (0 J/cm2) groups, respectively (n = 3, mean ± SE). Tert-Butyl hydroperoxide (TBHP) and N-acetyl Cysteine (NAC) were used as positive and negative controls, respectively. **P ≤ 0.01 in 10 J/cm2 compared to the higher fluences of 825 nm laser.