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Metabotropic glutamate (mGlu) receptors are G proteincoupled receptors (GPCRs) that act predominantly as modulators of synaptic transmission. As such, they play a role in many physiological and pathophysiological processes. BAY36-7620 is a pPotent non-competitive mGlu1 receptor antagonist with.

In vitro: BAY36-7620 is a potent and selective antagonist at mGlu1receptors and inhibits >60% of mGlu1a receptor constitutive activity (IC50 = 0.38 μM). BAY36-7620 is thus the first described mGlu1 receptor inverse agonist. Moreover, BAY36-7620 did not displace the [3H]quisqualate binding from the Glu-binding pocket, indicating that BAY36-7620 is a noncompetitive mGlu1 antagonist [2].

In vivo: BAY 36-7620 protected against pentylenetetrazole-induced convulsions in the mouse. As assessed in rats, BAY 36-7620 was devoid of the typical side effects of the ionotropic glutamate (iGlu) receptor antagonists phencyclidine and MK-801. Therefore, BAY 36-7620 did not disrupt sensorimotor gating, induce phencyclidine-like discriminative effects or stereotypical behavior, or facilitate intracranial self-stimulated behavior [3].

Clinical trial: Up to now, BAY 36-7620 is still in the preclinical development stage.

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