CDPPB is a potent, selective and brain penetrant positive allosteric modulator of the metabotropic glutamate receptor subtype 5 (mGluR5), with an EC50 of 27 nM in Chinese hamster ovary cells expressing human mGluR5.
CDPPB is a potent, selective and brain penetrant positive allosteric modulator of the metabotropic glutamate receptor subtype 5 (mGluR5), with an EC50 of 27 nM in Chinese hamster ovary cells expressing human mGluR5. At 1 mM, CDPPB shifted mGluR5 agonist concentration response curves to glutamate, quisqualate, and (R,S)-3,5-dihydroxyphenylglycine 3- to 9-fold to the left. At higher concentrations, CDPPB exhibited agonist-like activity on cells expressing mGluR5[1]. Chronic treatment of BACHD mice with CDPPB 1.5 mg/kg s.c. for 18 weeks increased the activation of cell signaling pathways important for neuronal survival, including increased AKT and ERK1/2 phosphorylation and augmented the BDNF mRNA expression. CDPPB chronic treatment was also able to prevent the neuronal cell loss that takes place in the striatum of BACHD mice and decrease htt aggregate formation. Moreover, CDPPB chronic treatment was efficient to partially ameliorate motor incoordination and to rescue the memory deficit exhibited by BACHD mice[2]. Consistent with a reduction of cortical mGlu5 receptor density and phosphorylation, CDPPB (30 mg/kg) significantly affected sleep architecture as determined by cortical EEG at day one however by the seventh day of dosing all sleep changes were absent[3].
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