Microarray analysis of the expression profiles of HATi II-treated and DMSO- treated U251 cells. (A, B) The box plot is a convenient way to quickly visualize the distributions of a dataset for mRNA (A) and lncRNA (B) profiles. The distributions of the log2 ratios between the groups after normalization are presented. (C) Differentially expressed mRNAs and (D) differentially expressed lncRNAs were analyzed using hierarchical clustering. Hierarchical clustering analysis arranges samples into groups based on their expression level, which allows us to evaluate the relationships between samples. “Red” indicates high relative expression, and “green” indicates low relative expression (mRNA fold changes ≥ 5 and lncRNA fold changes ≥ 3).