Representative images for benign prostate hyperplasia (BPH-1) epithelial cells are shown in Fig. 3a, for which an average 75% reduction in PTEN RNA counts was measured after siRNA treatment (Fig. 3b), a magnitude similar to that measured at the population level by quantitative reverse transcriptase polymerase chain reaction (qRT-PCR) (Fig. 3c). Here, PTEN is linked to benign prostatic hyperplasia.