In vitro activity: IC87201 (10 and 100 nM) attenuats NMDA/glycine-induced decreases in neurite outgrowth. IC87201 dose-dependently reduces NMDA-induced cGMP production in primary hippocampal neurons (DIV 14-21) with an IC50 of 2.7 μM. IC87201 increases the number of branches at 10-30 μM when compared to control-treated neurons. IC87201 (20 μM) suppresses NMDA-stimulated cGMP formation relative to vehicle, in cultured hippocampal neurons. IC87201 (500-1800 μM) does not inhibit any of the probe-PDZ interactions involving PDZ1, PDZ2, PDZ3 of PSD-95 or nNOS-PDZ, or bind the canonical PDZ ligand binding sites. IC87201 binds to the β-finger of nNOS-PDZ and allosterically inhibits the nNOS-PDZ/PSD-95-PDZ interactions. IC87201 shows high degree of fluorescence-based artefactual signal when using TAMRA-nNOS as probe.

Kinase Assay: IC87201 (500-1800 μM) does not inhibit any of the probe-PDZ interactions involving PDZ1, PDZ2, PDZ3 of PSD-95 or nNOS-PDZ, or bind the canonical PDZ ligand binding sites. IC87201 binds to the β-finger of nNOS-PDZ and allosterically inhibits the nNOS-PDZ/PSD-95-PDZ interactions. IC87201 shows high degree of fluorescence-based artefactual signal when using TAMRA-nNOS as probe.

Cell Assay: