EGCG (5 ÷ 20 μM) or Polyphenon E® (1 ÷ 10 μg/mL) treatments of different PCa cell lines have determined a dose- and time-dependent re-expression of GSTP1 enzyme concomitantly with the down-regulation of DNMT1 [41,106]. The gene discussed is GSTP1; the disease is posterior cortical atrophy.