DCG-IV is an effective agonist of class II mGluR. DCG-IV has anticonvulsant and neuroprotective effects. The EC50 of mGlu2R and mGlu3R are 0.35 and 0.09 μM, respectively. DCG-IV is also a competitive antagonist of Group I (IC50: mGlu1 / 5R = 389/630 μM) a
VU0486321 is a potent mGlu1 PAM with moderate rat PK (CLp = 13.3. mL min kg,t1 2 = 54 min), good free fraction (human fu = 0.05, rat fu =0.03) and excellent CNS penetration (Kp = 1.02).
YM-202074 is a high affinity, selective metabotropic glutamate receptor type 1 (mGlu1) antagonist. YM-202074 binds an allosteric site of the rat mGlu1 receptor with a Ki of 4.8 nM. It inhibits mGlu1-mediated inositol phosphates production (IC50 = 8.6 nM in rat cerebellar granule cells).
YM 298198 Hydrochloride is a non-competitive antagonist with high affinity and selectivity for mGlu1 receptors (Ki = 19 nM). YM 298198 Hydrochloride is inactive at other mGlu receptor subtypes (mGlu2-7), ionotropic receptors and glutamate transporters (IC50 > 10 μM). It inhibits glutamate-induced IP production more potently than CPCCOEt (IC50 values are 16 nM and 6.3 μM respectively).