pde4a

ML-030 is a potent and selective inhibitor of PDE4(PDE4A, PDE4A1, PDE4B1, PDE4B2, PDE4C1,and PDE4D2 with IC50 of 6.7 nM, 12.9 nM, 48.2 nM, 37.2 nM, 452 nM and 49.2 nM, respectively)

PF-06445974 has good selectivity for PDE4D, excellent brain permeability, and has a high level of specific binding in the cold tracer study.

Enoximone is a selective inhibitor of phosphodiesterase III (PDE3), with treatment of congestive heart failure.

GSK356278 is an effective and selective inhibitor of phosphodiesterase 4 (PDE4), with pIC50s of 8.6, 8.8, and 8.7 for human PDE4A, PDE4B, and PDE4D, respectively. GSK356278 has anti-inflammatory, anxiolytic, and cognition-enhancing effects.

LASSBio-1632 is a novel anti-asthmatic lead candidate that selectively inhibits PDE4A and PDE4D isoenzymes, leading to the suppression of airway hyper-reactivity (AHR) and TNF-α production in lung tissue. With high experimental BBB permeability, LASSBio-1632 (7j) efficiently crosses the blood-brain barrier through passive diffusion [1].

LEO 39652, a dual-soft PDE4 inhibitor, demonstrates potent inhibition of PDE4 subtypes A, B, C, and D with respective IC50 values of 1.2 nM, 1.2 nM, 3.0 nM, and 3.8 nM. Additionally, it inhibits TNF-α with an IC50 of 6.0 nM, indicating its potential for topical Atopic dermatitis (AD) research [1].

Rolipram (SB 95952) is a phosphodiesterase 4 inhibitor with antidepressant properties.