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Levels of NO in HGF cells were determined based on Griess reagent reaction. Experiments were conducted in duplicate, and changes were reported as mean ± SD; ∗∗∗p < 0.001. IL-1β: IL-1β-primed cells; Van: Vanillin; Van (2 h)+IL-1β: Vanillin (2 h pretreatment) plus IL-1β.
