PDE7 Inhibitor

Avanafil (TA-1790) is a potent and selective phosphodiesterase-5 (PDE-5) inhibitor with IC₅₀ values of 5.2 nM, 630 nM, 5700 nM, 6200 nM, 12000 nM, 27000 nM, 51000 nM and 53000 nM for PDE-5, PDE-6, PDE-4, PDE-10, PDE-8, PDE-7, PDE-2 and PDE-1, respectively. Avanafil activates NO/cGMP/PKG signaling-pathway to decrease loss in BMD, bone atrophy, and oxidative stress. Avanafil inhibits cyclic guanosine monophosphate (cGMP) hydrolysis and thus increases cGMP levels. Avanafil can be used for the research of erectile dysfunction and osteoporosis.

PF-05180999 (PF-999) is a phosphodiesterase 2A (PDE2A) inhibitor, with an IC₅₀ of 1.6 nM.

BRL-50481 is a novel and selective inhibitor of PDE7 with IC₅₀s of 0.15, 12.1, 62 and 490 μM for PDE7A, PDE7B, PDE4 and PDE3, respectively.

VP3.15 dihydrobromide is a highly potent, orally bioavailable, and CNS-penetrant PDE7-GSK3 dual inhibitor, with IC₅₀ values of 1.59 μM and 0.88 μM against PDE7 and GSK3, respectively. VP3.15 dihydrobromide elevates intracellular cAMP levels, suppresses immune responses, enhances remyelination, limits excessive tau phosphorylation, and alleviates neuroinflammation and neuronal loss. VP3.15 dihydrobromide promotes oligodendrocyte precursor cell differentiation, improves in vivo remyelination, inhibits autoimmune encephalomyelitis, and mitigates germinal matrix-intraventricular hemorrhage-related brain injury, cerebral atrophy, ventricular enlargement, and cognitive impairment. VP3.15 dihydrobromide can be used in research related to multiple sclerosis and germinal matrix-intraventricular hemorrhage.

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.

Multitarget AD-IN-6 (Compound 39) is a multi-target inhibitor, with an IC₅₀ of 15.54 μM against PDE4B, 15.15 μM against PDE7A, 8.39 μM against PDE3A, and a K_d of 37.7 μM against CHIT1. Multitarget AD-IN-6 acts as a TRPA1 antagonist, reduces the level of the NLRP3 inflammasome multiprotein complex to inhibit its activation, while inhibiting PDE4B, PDE7A and CHIT1, and decreasing the phosphorylation of NF-κB. Multitarget AD-IN-6 improves the pathology of elastase-induced emphysema in mice. Multitarget AD-IN-6 is applicable for the research of chronic obstructive pulmonary disease.

PDE3/4-IN-4 is an orally active PDE3A and PDE4B inhibitor with IC₅₀ values of 10 nM and 9.4 nM, respectively. PDE3/4-IN-4 shows selective activity relative to most other PDE family members. PDE3/4-IN-4 modulates the cAMP/PKA/CREB signaling pathway. PDE3/4-IN-4 inhibits pro-inflammatory factor IL-6. PDE3/4-IN-4 reduces expression of inflammatory markers in liver tissue. PDE3/4-IN-4 attenuates liver fibrosis. PDE3/4-IN-4 limits liver damage in cholestatic and sepsis-induced liver disease mice models. PDE3/4-IN-4 can be used for the research of liver injury, cholestatic liver diseases, sepsis-induced liver injury.

Pde7-in-3 (example 2) is an inhibitor of the phosphodiesterase PDE7 with potential analgesic activity. PDE7-IN-3 can be used to study inflammatory, neuropathic, visceral and nociceptive pain.

PDE7A-IN-1 is an orally active and selective PDE7A inhibitor with an IC₅₀ of 0.0037 μM against PDE7A. PDE7A-IN-1 shows excellent isozyme selectivity over PDE7B. PDE7A-IN-1 elevates intracellular cAMP levels, suppresses ECR5 enhancer activity and reduces sclerostin expression. PDE7A-IN-1 significantly increases bone mineral density in rats. PDE7A-IN-1 can be used for the study of osteoporosis.

PF-04822163 is an orally active, selective, and blood-brain barrier permeable PDE1 inhibitor with IC₅₀ values of 2 nM, 2.4 nM, and 7 nM for PDE1A, PDE1B, and PDE1C respectively. PF-04822163 can be used in the research of attention deficit hyperactivity disorder or Parkinson's disease.

Avanafil (TA-1790) dibenzenesulfonate is a potent and selective phosphodiesterase-5 (PDE-5) inhibitor with IC₅₀ values of 5.2 nM, 630 nM, 5700 nM, 6200 nM, 12000 nM, 27000 nM, 51000 nM and 53000 nM for PDE-5, PDE-6, PDE-4, PDE-10, PDE-8, PDE-7, PDE-2 and PDE-1, respectively. Avanafil dibenzenesulfonate activates NO/cGMP/PKG signaling-pathway to decrease loss in BMD, bone atrophy, and oxidative stress. Avanafil dibenzenesulfonate inhibits cyclic guanosine monophosphate (cGMP) hydrolysis and thus increases cGMP levels. Avanafil dibenzenesulfonate can be used for the research of erectile dysfunction and osteoporosis.

OPC-33540 is a highly selective and competitive PDE3 inhibitor with IC₅₀ values of 0.32 nM (PDE3A) and 1.5 nM (PDE3B). OPC-33540 exhibits IC₅₀s against PDE1, PDE2, PDE4, PDE5, and PDE7 of 42.9, 52.3, 100.8, 2.5, and 51.3 μM, respectively. OPC-33540 significantly enhances cAMP accumulation in platelets and effectively inhibits thrombin-induced platelet aggregation. OPC-33540 can be used in antithrombotic studies.

P7-2302 inhibits PDE7 and PDE4B with IC₅₀ of 0.18 nM and 77.3 nM. P7-2302 inhibits the efflux of P-gp and BCRP (breast cancer resistance protein), exhibits low uptake in rats brain. P7-2302 can be used as a PET tracer when labeled with 18F.

PDE5-IN-13 (Compound 14b) inhibits phosphodiesterase 5 (PDE5A) with an IC₅₀ of 3 nM. PDE5-IN-13 is a potential candidate for PAH (pulmonary arterial hypertension) research. PDE5-IN-13 has high selectivity for targets over PDE1, PDE2, PDE3, PDE4, PDE7, PDE8, PDE9, PDE10, and PDE11. PDE5-IN-13 is orally active.

PDE4-IN-12 is a potent pan-PDE4 inhibitor, with IC₅₀s of 3.5 and 15 nM for PDE4 and PDE7, respectively (SI=2.71 and 4.27, respectively). PDE4-IN-12 shows well tolerated, can be used in study of inflammatory bowel diseases (IBDs).

AN-2898 is a selective PDE4 inhibitor with IC₅₀ of 0.027 μM over other phosphodiesterase enzymes, such as PDE1A, PDE2A and PDE3A. AN-2898 also potently inhibits PDE4 subtypes (PDE4B1, PDE4A1A and PDE4D2). AN-2898 significantly inhibits the production of TNF-α, IL-2, IFN-γ, IL-5 and IL-10. AN-2898 can be used for mild to moderate atopic dermatitis (AD) and psoriasis research.

PDE/TRPA1/CHIT1-IN-1 is a phosphodiesterases (PDEs), TRPA1, and hCHIT1 (K_D of 37.7 μM) inhibitor. PDE/TRPA1/CHIT1-IN-1 is a broad-spectrum PDE inhibitor, potently targeting key isoforms including PDE4B, PDE7A, PDE3A, and PDE8A with IC₅₀s of 15.54, 15.15, 8.39 and 16.46 μM. PDE/TRPA1/CHIT1-IN-1 suppresses NLRP3 inflammasome activation and inhibits NF-κB phosphorylation, downregulating the expression of pro-inflammatory genes (TNF-α and IL-6) in vivo. PDE/TRPA1/CHIT1-IN-1 can be used for chronic obstructive pulmonary disease (COPD) and related inflammatory lung disorders research.

BC8-15 is a PDE inhibitor with IC₅₀ values of 0.28, 0.22, and 6.46 µM for inhibiting PDE8A, PDE4A, and PDE7A, respectively. BC8-15 can enhance steroidogenesis in mouse Leydig cells.

LH17, a Kaempferol (HY-14590) derivative, is a potent and selective PDE4 inhibitor (PDE4D2 IC₅₀ = 73 nM, PDE4B2 IC₅₀ = 190 nM). LH17 exhibits remarkable selectivity (>136-fold) against other PDE isoforms (PDE1B/2A/3A/5A/8A/9A/10A) (IC₅₀ > 10000 nM), with the exception of PDE7A1 (IC₅₀ = 300 nM). LH17 distinctly interacts with PDE4 M-pocket. LH17 demonstrates remarkable anti-fibrotic efficacy in both in vitro and in vivo models. LH17 can be used for idiopathic pulmonary fibrosis (IPF) research.

PDE4-IN-1 is a PDE4 inhibitor with high potency (IC₅₀ : 8.6 nM) and selectivity over other PDE subtypes. PDE4-IN-1 inhibits the release of inflammatory cytokines and chemokines. PDE4-IN-1 greatly restores impaired cAMP-CREB signaling pathway. PDE4-IN-1 inhibits proliferation and promotes differentiation to reverse the formation of psoriasis.