2. Signaling Pathways
  3. GPCR/G Protein
    Neuronal Signaling
  4. mGluR
  5. mGluR3 Isoform

mGluR3

The metabotropic glutamate receptor 3 (mGluR3) is a Group II G-protein-coupled receptor that regulates glutamate neurotransmission and synaptic plasticity[1][2]. Mechanistically, mGluR3 is expressed on both glial cells and neurons, with a predominantly presynaptic localization, acting as an inhibitory autoreceptor and heteroceptor[1][2][3]. In contrast to its close isoform mGluR2, mGluR3 contributes specifically to long-term depression and glial-mediated neuroprotection[1][3]. Activation of mGluR3 modulates downstream signaling pathways involved in neurotrophic factor production, including TGF-β, GDNF, NGF, and BDNF, which are critical for neuronal survival in experimental neurodegenerative models. Genetic studies link GRM3 polymorphisms to schizophrenia-related endophenotypes, such as impaired cognition and altered cortical activation, highlighting disease relevance[1][2]. Pharmacologically, selective mGluR3 agonists and positive allosteric modulators promote neuroprotection and modulate presynaptic glutamate release, whereas non-selective Group II ligands affect both mGluR2 and mGluR3[3]. Compared with mGluR2, mGluR3 exhibits distinct presynaptic inhibitory functions and glial involvement, offering unique experimental and therapeutic opportunities[3][4]. Recent studies also explore mGluR3 antagonists in glioblastoma models, where blockade induces astroglial differentiation and enhances cytotoxic chemotherapy efficacy[5]. Collectively, these findings establish mGluR3 as a critical modulator of glutamatergic signaling, neuroprotection, and disease-specific pathways, distinct from other Group II metabotropic glutamate receptors[1][2][3][5].

mGluR3 Related Products (34):

Cat. No. Product Name Effect Purity
  • HY-W014666
    Xanthurenic acid
    		Agonist 99.53%
    Xanthurenic acid is a putative endogenous Group II metabotropic glutamate receptor agonist, on sensory transmission in the thalamus.
  • HY-70059
    LY341495
    		Antagonist 99.96%
    LY341495 is a metabotropic glutamate receptor (mGluR) antagonist with IC50s of 21 nM, 14 nM, 7.8 μM, 8.2 μM, 170 nM, 990 nM, 22 μM for mGlu2, mGlu3, mGlu1a, mGlu5a, mGlu8, mGlu7, and mGlu4 receptors, respectively.
  • HY-103558
    LY379268
    		Agonist 99.84%
    LY379268 is a potent, selective and brain-penetrant mGlu2/3R agonist with EC50 values of 2.69 nM (mGlu2) and 4.48 nM (mGlu3). LY379268 has no activity on human mGlu 1a, 4a, 5a or 7a receptors. LY379268 has antioxidant and neuroprotective effects.
  • HY-W015546
    β-N-methylamino-L-alanine hydrochloride
    		Activator 98.0%
    β-N-methylamino-L-alanine hydrochloride (BMAA hydrochloride) is a neurotoxin produced by cyanobacteria. β-N-methylamino-L-alanine hydrochloride activates mGluR3 and inhibits PKC. β-N-methylamino-L-alanine hydrochloride can be used in the research of neurodegenerative diseases and immune diseases.
  • HY-18941
    Eglumegad
    		Agonist 99.94%
    Eglumegad (LY354740) is a highly potent and selective group II (mGlu2/3) receptor agonist with IC50s of 5 nM and 24 nM on transfected human mGlu2 and mGlu3 receptors, respectively.
  • HY-131286
    Talaglumetad
    		Activator
    Talaglumetad (LY-544344) is an orally active prodrug of Eglumegad (HY-18941) and a metabotropic glutamate receptor 2/3 (mGluR2/3) agonist. Talaglumetad undergoes transmembrane transport via the intestinal peptide transporter hPepT1, and is enzymatically hydrolyzed to produce L-alanine and the parent drug Eglumegad after entering the body. Talaglumetad can be used in research related to metabotropic glutamate receptor 2-associated neurological systems.
  • HY-131288
    LY2934747
    		Agonist
    LY2934747 is a selective and blood-brain barrier-permeable dual mGlu2/mGlu3 receptor agonist, with Ki values of 260 nM and 177 nM, and EC50 values of 8.4 nM and 62.4 nM against human receptors, respectively. LY2934747 exhibits antipsychotic and analgesic activities in in vivo animal models. LY2934747 can be used in studies related to psychosis and pain.
  • HY-119243
    LY2794193
    		Agonist 99.65%
    LY2794193 is a highly potent and selective mGlu3 receptor agonist (hmGlu3 Ki=0.927 nM，EC50=0.47 nM; hmGlu2 Ki=412 nM，EC50=47.5 nM).
  • HY-108710
    VU0650786
    		Antagonist 99.55%
    VU0650786 is a potent and selective CNS penetrant negative allosteric modulator of metabotropic glutamate receptor subtype 3 (mGlu3 NAM), with an IC50 of 392 nM. VU0650786 has antidepressant and anxiolytic activity in rodents.
  • HY-122138
    VU6010572
    		Modulator 99.88%
    VU6010572 is a potent, selective and brain-penetrant mGlu3 negative allosteric modulator with IC50 of 245 nM. VU6010572 is highly CNS penetrant.
  • HY-120717
    VU6001966
    		Inhibitor 99.89%
    VU6001966 is a brain-penetrant and selective mGlu2 receptor inhibitor. VU6001966 blocks mGlu2 receptor activity, counteracts LY379268 (HY-103558)-mediated blood-brain barrier protection and inflammatory cytokine dampening in microglia under inflammatory conditions. VU6001966 enhances antidepressant effects when combined with Scopolamine (HY-N0296). VU6001966 can be used for the research of major depressive disorder.
  • HY-50906
    LY404039
    		Agonist 98.0%
    LY404039 is a potent, selective and orally active mGluR2 and mGluR3 agonist with Kis of 149 nM and 92 nM for recombinant human mGluR2 and mGluR3, respectively. LY404039 shows >100-fold selectivity for mGluR2/3 over other receptors/transproters. LY404039 has antipsychotic and anxiolytic effects.
  • HY-101335
    DCG-IV
    		Agonist 99.0%
    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.
  • HY-105040C
    Pomaglumetad methionil hydrochloride
    		Agonist 98.0%
    Pomaglumetad methionil hydrochloride (LY2140023 hydrochloride) is an orally active, methionine prodrug of the selective mGlu2/3 receptor agonist LY404039. Pomaglumetad methionil hydrochloride has the potential for schizophrenia research.
  • HY-16766
    Decoglurant
    		Modulator 99.71%
    Decoglurant (RO4995819) is a negative allosteric modulator of mGluR2 and mGluR3. Decoglurant is developed as an antidepressant.
  • HY-19630
    ML289
    		Inhibitor 98.29%
    ML289 (VU0463597) is a potent, selective, and CNS-penetrant mGlu3 (IC50=0.66 μM) negative allosteric modulator. ML289 displays >15-fold selectivity over mGlu2 and is inactive against mGlu5. ML289 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
  • HY-123820
    LY3020371 hydrochloride
    		Antagonist 99.18%
    LY3020371 hydrochloride is a potent, selective metabotropic glutamate 2/3 receptor (mGlu2/3) antagonist with Ki of 5.3 and 2.5 nM, potently blocks cAMP formation with IC50 of 16.2 nM. LY3020371 hydrochloride exerts an antidepressant-like signature in vivo.
  • HY-16636
    ML337
    		Modulator 99.04%
    ML337 is a selective and brain-penetrant negative allosteric modulator of mGlu3, with an IC50 of 593 nM. ML337 possesses a favorable dystrophia myotonica protein kinase (DMPK) and ancillary pharmacology profile. ML337 is a click chemistry reagent, it contains an Alkyne group and can undergo copper-catalyzed azide-alkyne cycloaddition (CuAAc) with molecules containing Azide groups.
  • HY-131286A
    Talaglumetad (hydrochloride)
    		Agonist 99.58%
    Talaglumetad hydrochloride (LY-544344 hydrochloride) is an orally active prodrug of Eglumegad (HY-18941) and a metabotropic glutamate receptor 2/3 (mGluR2/3) agonist. Talaglumetad hydrochloride undergoes transmembrane transport via the intestinal peptide transporter hPepT1, and is enzymatically hydrolyzed to produce L-alanine and the parent drug Eglumegad after entering the body. Talaglumetad hydrochloride can be used in research related to metabotropic glutamate receptor 2-associated neurological systems.
  • HY-107509
    LY2389575 hydrochloride
    		Modulator 99.93%
    LY2389575 hydrochloride is a selective and noncompetitive mGlu3 negative allosteric modulator (NAM), with an IC50 value of 190 nM. LY2389575 hydrochloride induces an increase in Mrc1 levels. LY2389575 hydrochloride also independently amplifies Amyloid beta (Aβ) toxicity and can be used in study of Alzheimer's disease.