PDE4catalyticdomain

60nM(IC₅₀)

PDE4B1

31nM(IC₅₀)

FCPR03 is a potent and selective phosphodiesterase 4 (PDE4) inhibitor with IC50 values of 60 nM, 31 nM and 47 nM for PDE4 catalytic domain, PDE4B1 and PDE4D7, respectively. FCPR03 displays at least 2100-fold selectivity over other PDEs (PDE1-3 and PDE5-11). FCPR03 has anti-inflammatory, neuroprotective and antidepressant-like effects[1][2].

FCPR03 (5-20 μM; 30 hours; HT-22 cells) treatment increases cell viability (oxygen-glucose deprivation (OGD)-induced) in a dose-dependent manner, and 10 μM FCPR03 shows significant protective effects[1].FCPR03 (20 μM; 30 hours; HT-22 cells) treatment protects against OGD-induced cellular apoptosis in both HT-22 cells and cortical neurons. The levels of mitochondrial membrane potential (MMP) and ROS are also restored by FCPR03[1].FCPR03 (20 μM; 30 hours; HT-22 cells) treatment increases the levels of phosphorylated AKT, glycogen synthase kinase-3β (GSK3β), and β-catenin[1].

FCPR03 (1.25-5 mg/kg; intraperitoneal injection; once; adult male Sprague-Dawley rats) treatment reduces the infarct volume and improves neurobehavioral outcomes in rats following MCAO. FCPR03 increases the levels of phosphorylated AKT, GSK3β and β-catenin within the ischemic penumbra of rats following cerebral ischemia-reperfusion[1].

[1]. Bingtian Xu, et al. FCPR03, a Novel Phosphodiesterase 4 Inhibitor, Alleviates Cerebral ischemia/reperfusion Injury Through Activation of the AKT/GSK3β/ β-catenin Signaling Pathway. Biochem Pharmacol. 2019 May;163:234-249.
[2]. Zheng-Qiang Zou, et al. Novel Phosphodiesterase 4 Inhibitor FCPR03 Alleviates Lipopolysaccharide-Induced Neuroinflammation by Regulation of the cAMP/PKA/CREB Signaling Pathway and NF- κ B Inhibition. J Pharmacol Exp Ther. 2017 Jul;362(1):67-77.