IBMX is a widely-used non-specific inhibitor of cyclic AMP (cAMP) and cyclic GMP (cGMP) phosphodiesterases (PDEs) (IC50 = 19, 50, 18, 13, 32, 7, and 50 μM for PDE1, PDE2, PDE3, PDE4, PDE5, PDE7, and PDE11, respectively). PDE8A, PDE8B, and PDE9 are insensitive to IBMX.1 By inhibiting PDEs, IBMX increases cellular cAMP and cGMP levels, activating cyclic-nucleotide-regulated protein kinases. Methylxanthines, including IBMX, caffeine, and theophylline, bind adenosine receptors,typically antagonizing the suppressive effects of natural agonists.2
1
Fawcett, L., Baxendale, R., Stacey, P., et al. Molecular cloning and characterization of a distinct human phosphodiesterase gene family: PDE11A. Proc Natl Acad Sci USA97(7)3702-3707(2000).
2
Snyder, S.H., Katims, J.J., Annau, Z., et al. Adenosine receptors and behavioral actions of methylxanthines [caffeine/theophylline/N6-cyclohexyladenosine/N6-(phenylisopropyl)adenosine]. Proc Natl Acad Sci USA78(5)3260-3264(1981).
Room temperature
in continental US; may vary elsewhere
SMILES
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CC(C)CN(C1=C2NC=N1)C(N(C)C2=O)=O
Background Reading
Fawcett, L., Baxendale, R., Stacey, P., et al. Molecular cloning and characterization of a distinct human phosphodiesterase gene family: PDE11A. Proc Natl Acad Sci USA97(7)3702-3707(2000).
Snyder, S.H., Katims, J.J., Annau, Z., et al. Adenosine receptors and behavioral actions of methylxanthines [caffeine/theophylline/N6-cyclohexyladenosine/N6-(phenylisopropyl)adenosine]. Proc Natl Acad Sci USA78(5)3260-3264(1981).
IBMX is available in the following screening
library: