| Name | Niflumic acid |
| Description | Niflumic acid (Nifluril) is a Ca2+-activated Cl- channel blocker and an analgesic and anti-inflammatory agent used in the therapy of rheumatoid arthritis. |
| In vivo | Niflumic acid suppresses calcium-activated currents on the basolateral membrane of rat pancreatic exocrine cells with an IC50 of 50 μM. It dose-dependently and reversibly activates the calcium-activated potassium (KCa) channels. Niflumic acid induces a spontaneous transient concentration-dependent inhibition of inward currents (STIC, calcium-activated chloride currents) amplitude. It inhibits calcium-activated chloride channels with a Ki of 17 mM. Additionally, Niflumic acid suppresses ICl(Ca) under the permeabilizing effect of Ca2+ on oocytes through Ca2+ ionophore A23187, suggesting the inhibition of ICl(Ca) results from direct interaction with Cl- channels, not by disruption of Ca2+ entry through voltage-dependent Ca2+ channels. Niflumic acid attenuates norepinephrine and caffeine-induced inward currents (IO(Ca)) with an IC50 of 6.6 μM, which is less effective than that on spontaneous currents. It exhibits a voltage-dependent inhibition of the amplitude of spontaneous transient currents (STIC), with IC50 values of 1.1 μM at +50 mV and 2.3 μM at -50 mV. Furthermore, Niflumic acid reduces airway hyperresponsiveness and eosinophilic infiltration, as well as inhibits IL-13 induced goblet cell hyperplasia. Following the IL-13 challenge, Niflumic acid hampers the overexpression of the MUC5AC gene (a marker of goblet cell proliferation) and levels of chemokines in bronchoalveolar lavage fluid. It also represses the activation of JAK/STAT6, AK2, and the expression of chemokines in epithelial cells. |
| Storage | Powder: -20°C for 3 years | In solvent: -80°C for 1 year | Shipping with blue ice. |
| Solubility Information | DMSO : 60 mg/mL (212.6 mM), Sonication is recommended.
H2O : < 1 mg/mL (insoluble or slightly soluble)
Ethanol : < 1 mg/mL (insoluble or slightly soluble)
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| Keywords | Cl? Channels | Inhibitor | inhibit | Chloride Channel | Niflumic acid |
| Inhibitors Related | Neomycin sulfate | Ibuprofen | Acetaminophen | Salicylamide | Diclofenac sodium | Diclofenac Potassium | Paradol | Indomethacin sodium hydrate | Trometamol | Revaprazan hydrochloride |
| Related Compound Libraries | Pain-Related Compound Library | Bioactive Compound Library | Anti-Neurodegenerative Disease Compound Library | Membrane Protein-targeted Compound Library | Drug Repurposing Compound Library | Inhibitor Library | Anti-Aging Compound Library | Bioactive Compounds Library Max | Ion Channel Targeted Library | Anti-Cancer Drug Library |
United States
