(A, B) MTS cell proliferation assays of control and MAOA-KD LNCaP (A) and C4-2 (B) cells by Enz, Daro or Apa at various doses for 5 days (n=3). (C-F) Cell counting assays of LNCaP (C, D) and C4-2 (E, F) cells by Enz, Daro or Apa (5 μM for each) together with clorgyline (1 μM) or phenelzine (2 μM) for 5 days (n=3). Average cell numbers in control group with no treatment were set as 100%. (G) Schematic summarizing MAOA-AR reciprocal interaction in PC. Data represent the mean ± SEM. *p<0.05, **p<0.01.