A-33 (A33) is a potent and selective catalytic site-targeting PDE4B inhibitor (IC50 = 15 nM/PDE4B vs. 1.7 μM/PDE4D) that effectively prevents PDE4B-medicated cellular cAMP hydrolysis (150%/320% increased cAMP level with 100 nM/1 μM A-33 pre-treament in murine hippocampal HT-22 cells following 10 nM isoproterenol stimulation) in vitro and inhibits LPS-induced TNF-α production in mice in vivo (ID50 = 14 mg/kg p.o.). When administered via intraperitoneal injection, A-33 improves cognitive function in a rat model of traumatic brain injury (0.3 mg/kg i.p.) and exhibits antidepressant property in mice (0.3-1 mg/kg i.p.) in vivo.
Orally acive, potent and selective catalytic site-targeting PDE4B inhibitor with anti-inflammatory, antidepressant, and cognition-improving efficacy in vivo.
In this study the first PDE4B selective inhibitor is described. Optimization of lead 2-arylpyrimidine derivatives afforded a series of potent PDE4B inhibitors with >100-fold selectivity over the PDE4D isozyme. With a good pharmacokinetic profile, a selected compound exhibited potent anti-inflammatory
Phosphodiesterase-4B (PDE4B) regulates the pro-inflammatory Toll Receptor -Tumor Necrosis Factor α (TNFα) pathway in monocytes, macrophages and microglial cells. As such, it is an important, although under-exploited molecular target for anti-inflammatory drugs. This is due in part to the difficulty
In this study we report a series of triazine derivatives that are potent inhibitors of PDE4B. We also provide a series of structure activity relationships that demonstrate the triazine core can be used to generate subtype selective inhibitors of PDE4B
The Journal of neuroscience : the official journal of the Society for Neuroscience, 36(27), 7095-7108 (2016-07-08)
Learning and memory impairments are common in traumatic brain injury (TBI) survivors. However, there are no effective treatments to improve TBI-induced learning and memory impairments. TBI results in decreased cAMP signaling and reduced cAMP-response-element binding protein (CREB) activation, a critical
Inhibition of cyclic AMP (cAMP)-specific phosphodiesterase 4 (PDE4) has been proposed as a potential treatment for a series of neuropsychological conditions such as depression, anxiety and memory loss. However, the specific involvement of each of the PDE4 subtypes (PDE4A, 4B