Lack of effect of LY314582 (a group 2 metabotropic glutamate receptor agonist) on phencyclidine-induced locomotor activity in metabotropic glutamate receptor 2 knockout mice

In metabotropic glutamate receptor 2 (mGlu(2)) knockout mice, the group 2 m etabotropic glutamate receptor agonist LY314582 (20 mg/kg, i.p.), a racemat e of LY354740, inhibits neither spontaneous nor phencyclidine (PCP)-induced (2.5 mg/kg, s.c.) locomotor activity. Since LY314582 attenuated spontaneou s and PCP-induced locomotor activity in wild-type control mice, these data indicate that the effects of LY314582 are mediated via the mGlu(2) receptor and not via the mGlu(3) receptor. (C) 2000 Elsevier Science B.V. All right s reserved.