TRPA1 Inhibitor

AP-18, a potent and selective TRPA1 inhibitor, blocks activation of TRPA1 by 50 μM Cinnamaldehyde with an IC₅₀ of 3.1 μM and 4.5 μM for human and mouse TRPA1, respectively. AP-18 reverses complete Freund's adjuvant (CFA)-induced mechanical hyperalgesia in mice. AP-18 attenuated 30 μM AITC-induced Yo-Pro uptake in a concentration-dependent manner, with an IC₅₀ of 10.3 μM.

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.

LY3526318 is an orally active, selective TRPA1 antagonist (IC₅₀=5-6μM). LY3526318 blocks TRPA1 channels, inhibits pain signal transduction mediated by the channel, and exerts analgesic activity. LY3526318 is mainly used in the research of chronic pain-related fields, such as diabetic peripheral neuropathy, chronic low back pain, and pain caused by osteoarthritis.

TRPA1-IN-2 (compound 1) is a potent and orally active TRPA1 inhibitor with an IC₅₀ value of 0.04 µM. TRPA1-IN-2 shows anti-inflammation activity.

ProTx-I is a toxin derived from Thrixopelma pruriens and a peptide inhibitor targeting TTX-resistant sodium channels. ProTx-I interacts with voltage sensors of multiple domains such as NaV1.7, reduces neuronal excitability through allosteric modulation of channel gating and alteration of voltage dependence. The IC₅₀ values of ProTx-I against human NaV1.7, NaV1.2, NaV1.6, and NaV1.5 are 95 nM, 104 nM, 21 nM, and 358 nM, respectively; ProTx-I also potently inhibits Ba²⁺ currents of hCav3.1, while its inhibitory potency against hCav3.2 is approximately 160-fold lower. ProTx-I is applicable to the research of chronic pain.

TRPV1-IN-2 ((R)-32) is a TRPV1 inhibitor. TRPV1-IN-2 has protective effects on ED epilepsy models.

ZQMT-10 is an orally active and potent antagonist of TRPA1, with the K_d of 1.04 μM. ZQMT-10 plays an important role in cancer research.

TRPA1-IN-5 is a TRPA1 inhibitor with inhibitory activity against TRPA1. TRPA1-IN-5 has pharmacokinetic and pharmacodynamic activities.

TRPV4/TRPA1-IN-1 is a TRPV4/TRPA1 inhibitor that suppresses TRPV4/TRPA1-mediated calcium influx. TRPV4/TRPA1-IN-1 alleviates pain behaviors in a mouse trigeminal stimulation pain model and inhibits inflammation and pain-related behaviors in a mouse acute pancreatitis model. TRPV4/TRPA1-IN-1 can be used in research on acute pancreatitis.

TRPA1-IN-3 (commound 1) is a TRPA1 inhibitor. TRPA1-IN-3 can be used in skin and respiratory tract related research.