Vinpocetine(Cavinton; Ethyl apovincaminate) is a selective for PDE1 (IC50 = 21 μM). Also blocks voltage-gated Na+ channels.IC50 value:Target: PDE1; Na+ channel
T-0156 is a potent and selective phosphodiesterase type 5 (PDE5) inhibitor. T-0156 specifically inhibits the hydrolysis of cyclic guanosine monophosphate (cGMP) by PDE5 in a competitive manner (IC50=0.23 nM). T-0156 inhibits PDE6 (IC50=56 nM) and has low potencies against PDE1, PDE2, PDE3, and PDE4 (IC50>10 μM). T-0156 enhances the nitric oxide (NO)/cGMP pathway[1].
CALP2 is a calmodulin (CaM) antagonist ( (Kd of 7.9 µM)) with high affinity for binding to the CaM EF-hand/Ca2+-binding site. CALP2 inhibits CaM-dependent phosphodiesterase activity and increases intracellular Ca2+ concentrations. CALP2 potently inhibits of adhesion and degranulation. CALP2 is also a strong activator of alveolar macrophages[1][2][3][4].
Siguazodan (SKF 94836) is a potent, selective and orally active phosphodiesterase III (PDE-III) inhibitor with an IC50 of 117 nM. Siguazodan increases cAMP accumulation in intact platelets with an EC50 of 18.88 μM. Siguazodan also inhibits phenylephrine-induced 5-HT release with an IC50 value of 4.2 μM[1][2][3].
RGW2938 is a phosphodiesterase inhibitor.
Zardaverine is a newly developed dual-selective PDE3/4 inhibitor with IC50 values of 0.5 uM and 0.8 uM respectively. IC50 value: 0.5 uM (PDE3); 0.8 uM (PDE4)Target: PDE3; PDE4Zardaverine inhibited the cyclic GMP-inhibitable PDE III from human platelets and the rolipram-inhibitable PDE IV from canine trachea and human polymorphonuclear (PMN) cells with IC50-values of 0.58, 0.79 and 0.17 μM, respectively. The pyridazinone derivative affected the calmodulin-stimulated PDE I, the cyclic GMP-stimulated PDE II and the cyclic GMP-specific PDE V only marginally at concentrations up to 100μM. Zardaverine inhibits the ADP-induced aggregation of human platelets with an IC50 of 1.6 μM. This inhibition was synergistically increased by activators of adenylate cyclase such as PGE1 and forskolin. In human PMN cells, Zardaverine inhibited the zymosan-induced superoxide anion generation with an IC50 of 0.40 μM. Again, this effect was increased by activators of adenylate cyclase. Zardaverine acted in synergy with the adenylate cyclase activators prostaglandin E2 and CG 4203, a prostacyclin analog, and super-additive effects of combinations were observed. Zardaverine and dexamethasone prevent bronchial eosinophilia and neutrophilia with similar dosage of 30 microM/kg orally, suggesting that this PDE III/IV inhibitor may be useful for both, bronchorelaxation and reduction of inflammation in asthma therapy.
Ibudilast-d3 (KC-404-d3) is the deuterium labeled Ibudilast. Ibudilast (KC-404) is a cyclic AMP phosphodiesterase (PDE) inhibitor. Ibudilast has platelet anti-aggregatory effects. Ibudilast can be used for the research of asthma for its inhibitory effects on tracheal smooth muscle contractility. Ibudilast may be a useful neuroprotective and anti-dementia agent counteracting neurotoxicity in activated microglia[1][2].
Lotamilast is a selective phosphodiesterase 4 (PDE4) inhibitor with an IC50 of 2.8 nM.
Ambuphylline (Bufylline) is a bronchodilator. Ambuphylline is a theophylline derivative possibly acting through phosphodiesterase inhibition. Ambuphylline can be used for the research of asthma and other lung diseases[1].
Phenacaine (Holocaine) is a local anesthetic. Phenacaine inhibits the specific calmodulin-dependent stimulation of erythrocyte Ca2+-ATPase and cyclic nucleotide phosphodiesterases from brain and heart[1][2].
Apremilast D5 (CC-10004 D5) is a deuterium labeled Apremilast. Apremilast is an orally available inhibitor of type-4 cyclic nucleotide phosphodiesterase (PDE-4) with an IC50 of 74 nM. Apremilast inhibits TNF-α release by lipopolysaccharide (LPS) with an IC50 of 104 nM[1].
PAT-505 is a potent, selective, noncompetitive and orally available autotaxin inhibitor, with an IC50 of 2 nM in Hep3B cells, 9.7 nM in human blood and 62 nM in mouse plasma.
Sildenafil citrate is a potent phosphodiesterase type 5 (PDE5) inhibitor with IC50 of 5.22 nM.
Cudetaxestat (BLD-0409) is a potent and orally active autotaxin (ATX) inhibitor[1].
Vardenafil Hcl is a PDE5 inhibitor used for treating erectile dysfunction.Target: PDE5Vardenafil specifically inhibited the hydrolysis of cGMP by PDE5 with an IC50 of 0.7 nM (6.6 nM). In contrast, the IC50 of vardenafil for PDE1 was 180 nM; for PDE6, 11 nM; for PDE2, PDE3 and PDE4, more than 1000 nM. Relative to PDE5, the ratios of the IC50 for PDE1 were 257 (60), for PDE6 16 (7.4). Vardenafil significantly enhanced the SNP-induced relaxation of human trabecular smooth muscle at 3 nM (10 nM). Vardenafil also significantly potentiated both ACh-induced and transmural electrical stimulation-induced relaxation of trabecular smooth muscle [1]. Both vardenafil doses(10 mg or 20 mg) significantly enhanced the
TMX-4100 is a selective phosphodiesterase 6D (PDE6D) degrader. TMX-4100 shows a high degradation preference for PDE6D with the DC50 values less than 200 nM in MOLT4, Jurkat, and MM.1S cells. TMX-4100 can be used for the research of multiple myeloma[1].
ent-Tadalafil-d3 (ent-IC-351-d3) is the deuterium labeled ent-Tadalafil. ent-Tadalafil (ent-IC-351), compound (6S,12aS), is a inactive cis-enantiomer of compound (6R,12aS). compound (6R,12aS) is a potent PDE5 inhibitor with an IC50 of 0.090 μM, while ent-Tadalafil is inactive at concentrations up to 10 µM[1][2].
PDE7-IN-2 (compound 2) is a potent PDE7 (phosphodiesterase 7) inhibitor with IC50 value of 2.1 µM. PDE7-IN-2 has the potential for the research of parkinson’s disease[1].
PDE4B-IN-2 is an orally active and selective PDE4B inhibitor (IC50=15 nM) and exhibits >100-fold selectivity for PDE4B over 4D. PDE4B-IN-2 regulates cAMP in inflammatory cells and inhibits LPS-induced TNF-α production and neutrophil accumulation in mouse lungs. PDE4B-IN-2 reduces microglial and neutrophil activation, and improves behavioral deficits in a traumatic brain injury model in vivo. PDE4B-IN-2 also exhibits antidepressant-like effects.
ATX inhibitor 21 (compound 8) is a potent ATX (autotaxin) inhibitor, with an IC50 of 3490 nM[1].
PDE IV-IN-1 is an inhibitor of phosphodiesterase IV, used for the research of asthma, COPD or other inflammatory diseases.
Vardenafil is a PDE5 inhibitor used for treating erectile dysfunction.Target: PDE5Vardenafil specifically inhibited the hydrolysis of cGMP by PDE5 with an IC50 of 0.7 nM (6.6 nM). In contrast, the IC50 of vardenafil for PDE1 was 180 nM; for PDE6, 11 nM; for PDE2, PDE3 and PDE4, more than 1000 nM. Relative to PDE5, the ratios of the IC50 for PDE1 were 257 (60), for PDE6 16 (7.4). Vardenafil significantly enhanced the SNP-induced relaxation of human trabecular smooth muscle at 3 nM (10 nM). Vardenafil also significantly potentiated both ACh-induced and transmural electrical stimulation-induced relaxation of trabecular smooth muscle [1]. Both vardenafil doses(10 mg or 20 mg) significantly enhanced the rates of successful penetration (P < 0.0001) and successful intercourse (P < 0.0001) compared with placebo. Vardenafil treatment was effective in increasing intercourse success rates at all levels of baseline ED severity, at each level of plasma HbA1c, and for type 1 and 2 diabetes [2].
PDE12-IN-1 is a potent and selective PDE12 inhibitor with a pIC50 value for enzyme inhibition of 9.1. PDE12-IN-1 increases 2′,5′-linked adenylate polymers (2-5A) levels, and the pEC50 value is 7.7. PDE12-IN-1 shows antiviral activity[1].
PF-04447943 is a potent inhibitor of human recombinant PDE9A (IC50=12 nM) with >78-fold selectivity, respectively, over other PDE family members (IC50>1000 nM).
Roflumilast-d4 is the deuterium labeled Roflumilast. Roflumilast is a selective PDE4 inhibitor with IC50s of 0.7, 0.9, 0.7, and 0.2 nM for PDE4A1, PDEA4, PDEB1, and PDEB2, respectively, without affecting PDE1, PDE2, PDE3 or PDE5 isoenzymes from various cells[1][2].
Furamidine-d8 (DB75-d8) is the deuterium labeled Furamidine. Furamidine (DB75) is a selective protein arginine methyltransferase 1 (PRMT1) inhibitor with an IC50 of 9.4 μM. Furamidine is selective for PRMT1 over PRMT5, PRMT6, and PRMT4 (CARM1) (IC50s of 166 µM, 283 µM, and >400 µM, respectively). Furamidine is a potent, reversible and competitive tyrosyl-DNA phosphodiesterase 1 (TDP-1) inhibitor. Inhibition of TDP-1 by Furamidine is effective both with single- and double-stranded DNA substrates but is slightly stronger with the duplex DNA. Furamidine is also an antiparasite agent[1][2][3].
BW-A 78U is a PDE4 inhibitor with an IC50 of 3 μM.
PF-03049423 (Compound PF-5) free base is a potent and highly selective phosphodiesterase-5A inhibitor with an IC50 of about 0.2 nM for rat and human platelet enzyme. PF-03049423 free base can be used for the research of acute ischaemic stroke[1].
ATX inhibitor 7 is a autotaxin inhibitor and shows good oral exposure.
Theophylline is a nonselective phosphodiesterase (PDE) inhibitor, adenosine receptor blocker, and histone deacetylase (HDAC) activator.