cAMP-specific phosphodiesterase type 4 (PDE4)

cAMP-specific phosphodiesterase type 4 is an enzyme that specifically hydrolyzes cyclic adenosine monophosphate (cAMP) to 5′-AMP, terminating cAMP signaling in cells. Four PDE4 genes (PDE4A, PDE4B, PDE4C, PDE4D) generate numerous isoforms, each with distinct regulatory and localization properties. PDE4s play a pivotal role in modulating cellular cAMP levels and, consequently, a wide range of physiological processes, notably in the immune system, central nervous system, cardiovascular system, and airway smooth muscle. Because of their key role in cAMP regulation, PDE4 isoforms are therapeutic targets for inflammatory, respiratory, and neuropsychiatric conditions, and selective inhibitors are being developed for clinical use[1][2][4][7].

Other names

Phosphodiesterase 4PDE4APDE4BPDE4CPDE4DCyclic AMP phosphodiesterase type 4cAMP phosphodiesterase 4

Inhibition of PDE4 elevates intracellular cAMP by preventing its breakdown, which modulates inflammatory responses and can affect neural signaling pathways[1][2][4][6].