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Phosphodiesterase (PDE) inhibitors prevent the hydrolysis of cyclic nucleotides, second messengers of many receptors. The PDE superfamily comprises 11 families, PDE1 to PDE11, which differ in substrate preference, regulation and tissue distribution. Some families hydrolyze cyclic adenosine monophosphate (cAMP), others cyclic guanosine monophosphate (cGMP), and several act on both. By controlling the amplitude and location of these signals, PDEs shape inflammation, smooth muscle tone and cardiac function. PDE4 inhibitors in this category include roflumilast and apremilast, which are studied in inflammatory cell signaling. Sildenafil inhibits the cGMP-specific PDE5, and cilostazol is a PDE3 inhibitor. Ibudilast inhibits several families, including PDE3, PDE4, PDE10 and PDE11.
6-Cl-cPuMP sodium is a cAMP analog that acts as a phosphodiesterase (PDE) stabilizer. This compound exhibits excellent membrane permeability, allowing for effective cellular uptake, while maintaining stability against PDE degradation. 6-Cl-cPuMP sodium is particularly useful in research related to the nervous system, enabling studies of cAMP signaling pathways and their implications in neurobiology.
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