
Keywords: اعتیاد به مورفین; DNA methylation; Okadaic acid; Morphine addiction; Conditioned place preference; Hippocampus; Prelimbic cortex; 5-aza; 5-aza-2-deoxycytidine; DNMTs; DNA methyltransferases; PL; prelimbic cortex; mCPP; morphine-induced conditioned place preference; PP; pro