Statistical analysis
Graph Pad Prism 7.0 and SPSS 16.0 software were used for statistical
evaluation. Group differences in cell and animal experiments were
compared using independent-samples Student t tests. Prior to
analysis, all data underwent the Kolmogorov-Smirnov normality test and
Levene’s test; results showed that all data from different group of data
satisfied the normality and homogeneity of variance. Data are expressed
as mean ± SEM. P < 0.05 was considered statistically
significant.