(A) The structural illustration of different MYB promoter luciferase reporters. (B) Luciferase reporter assays. LNCaP cells were transfected with MYB promoter reporters or control pGL3-basic empty vector and β-gal–expressing vector (internal control) for 24 h, followed by treatment with CSS or CSS plus 10 nM R1881 (CSS+R) for 24 h. (C) ChIP assays. LNCaP cells were treated with or without 10 nM R1881 in CSS medium for 24 h prior to ChIP assays. The data are expressed as percentage of input. Pol II, RNA polymerase II; LSD1, lysine-specific demethylase 1; M3H3K27, trimethyl-histone 3 lysine 27; M3H3K4, trimethyl-histone 3 lysine 4; AceH3, acetyl-histone 3 lysine 27. *P < 0.05.