Bioinformatics analysis of microarray and amino acid profiles in hBM-MSCs stored in PBS for 12 h. (a) Lipid peroxidation-related genes and amino acid network were constructed algorithmically by IPA. Red and green areas indicate up- and downregulated genes, respectively. Differentially expressed genes obtained from microarray data (genes with >3-fold change) are shown. (b) qPCR analysis of lipid peroxidation-related gene expression in hBM-MSCs stored in PBS for 6 and 12 h. Data represent mean ± SD of three independent experiments. *P < 0.05, **P < 0.001 vs. 0 h (control).