tokens: The drugs were obtained from the following sources : fluvoxamine maleate ( Solvay Seiyaku K . K . , Tokyo , Japan ) ; paroxetine hydrochloride , dehydroepiandosterone - sulfate ( DHEA - sulfate ) , LY294002 ( Sigma - Aldrich , St Louis , MO , USA ) ; sertraline ( Toronto Research Chemicals Inc . , North York , ON , Canada ) ; SA4503 ( M ' s Science Corporation , Kobe , Japan ) ; NGF ( Promega , Madison , WI ) ; xestospongin C , lovastatin , PD98059 , GW5074 , SB203580 , MEK 1 / 2 inhibitor ( SL327 ) , and SP600125 ( Calbiochem - Novabiochem , San Diego , CA ) .