Fig. 3
Dose dependent effects of H2O2 on the viability of HGF-1 cells with and without pretreating with the TBQ extract at a dose of 100 μg/ml for 24 h. The bars represent the mean of 3 independent experiments (n = 3) and the error bars represent their standard deviation. The data denoted by * and ** are significantly different from the corresponding negative control. The data denoted by *** is significantly different from that of the test without TBQ extract. The level of significance was P < 0.05