Unsupervised hierarchical clustering and principal component analysis (PCA) of miRNA expression profile.

<p>miRNA expression patterns of 5 tARPC, 5 gARPC and 3 MSC different clones and 3 different RPTEC lines were examined using Agilent array composed of 1205 human miRNAs. A total of 327 miRNA resulted expressed between different cell types (false discovery rate <0.01). The 2-D hierarchical clustering (<b>A</b>) and the PCA (<b>B</b>) showed that miRNA expression profile was different among MSCs, RPTECs and ARPCs, whereas it was very similar between gARPCs and tARPCs.