mGluR1 Agonist

Ro 67-7476 is a potent positive allosteric modulator of mGluR₁ and potentiates glutamate-induced calcium release in HEK293 cells expressing rat mGluR1a with an EC₅₀ of 60.1 nM. Ro 67-7476 is a potent P-ERK1/2 agonist and activates ERK1/2 phosphorylation in the absence of exogenously added glutamate (EC₅₀=163.3 nM).

DHPG is the agonist for mGluR 1/5 (EC₅₀ for mGluR 1 is 60 nM) that activates the phospholipase C (PLC) pathway, and leads ultimately to the activation of protein kinase C (PKC).

L-Cysteinesulfinic acid is a potent agonist at several rat metabotropic glutamate receptors (mGluRs) with pEC₅₀s of 3.92, 4.6, 3.9, 2.7, 4.0, and 3.94 for mGluR1, mGluR5, mGluR2, mGluR4, mGluR6, and mGluR8, respectively.

L-Cysteinesulfinic acid monohydrate is a potent agonist at several rat metabotropic glutamate receptors (mGluRs) with pEC₅₀s of 3.92, 4.6, 3.9, 2.7, 4.0, and 3.94 for mGluR1, mGluR5, mGluR2, mGluR4, mGluR6, and mGluR8, respectively.

(S)-3,5-DHPG is a weak, but selective group I metabotropic glutamate receptors (mGluRs) agonist with K_i values of 0.9 μM and 3.9 μM for mGluR1a and mGluR5a, respectively. (S)-3,5-DHPG exhibits anxiolytic activity in rats subjected to hypoxia.

DCG-IV is a potent agonist of group II mGluRs with EC₅₀s of 0.35 and 0.09 μM for mGlu2R and mGlu3R, reapectively. DCG-IV is also a competitive antagonist at group I (IC₅₀: mGlu1R/5R=389/630 μM) and III receptors (IC₅₀: mGlu4R/6R/7R/8R= 22.5/39.6/40.1/32 μM). DCG-IV has anticonvulsive and neuroprotective effects.

VU-29 is a positive allosteric modulator of metabotropic glutamate 5 (mGlu5) receptor (EC₅₀=9 nM and K_i=244 nM for rmGluR5). VU-29 is selective for mGluR5 relative to other mGluR subtypes (EC₅₀: rmGluR1/rmGluR2=557 nM/1.5 μM; hmGluR4=154 nM).

RO0711401 is a selective and orally active positive allosteric modulator of mGlu1 receptor with an EC₅₀ of 56 nM.

Ro 67-4853 is a positive allosteric modulator (PAM) of mGluR1 (pEC₅₀=7.16 for rmGlu1a receptor). Ro67-4853 exhibits activity at all group I mGlu receptors including hmGlu1, rmGlu1, and rmGlu5. Ro 67-4853 enhances the potency of L-Glu by interacting with the transmembrane domain (TMD) of the receptor. Ro 67-4853 potentiates sensory synaptic responses to repetitive vibrissa stimulation.

VU6024578 (BI02982816) is a selective, orally active positive allosteric modulator (PAM) for metabotropic glutamate receptor (mGluR1), that activates human mGluR1 and rat mGluR1 with EC₅₀ of 54 nM and 46 nM. VU6024578 exhibits antipsychotic activity in rats amphetamine-induced hyperactivity models and MK-801 (HY-15084B)-induced novel object recognition (NOR) models. VU6024578 is blood brain barrier penetrable.