Diphenyleneiodonium chloride (DPI) is an irreversible inhibitor of iNOS and eNOS with IC50 values of 50 nM and 0.3 µM, respectively. DPI chloride has been used to inhibit other flavoenzymes such as neutrophil NADPH oxidase and to bind strongly to flavoproteins. DPI chloride is thus a powerful and specific inhibitor of several important enzymes, including NADPH cytochrome P450 oxidoreductase, NADPH oxidases and NADPH-ubiquinone oxidoreductase.
| Molecular Weight | 314.55 |
| Formula | C12H8I.Cl |
| CAS Number | 4673-26-1 |
| Solubility (25°C) | DMSO 6 mg/mL (with warming) |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
| Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
| Related NO Synthase Products |
|---|
| 6-Methoxynaringenin
6-Methoxynaringenin is an aerial part of Scutellaria barbata D. Don (Lamiaceae) and inhibits NO production efficiently with an IC50 value of 25.8 μM. |
| Camstatin
Camstatin, a functionally active 25-residue fragment of PEP-19's IQ motif, binds calmodulin and inhibits neuronal nitric oxide (NO) synthase. |
| N'-Nitro-D-arginine
N'-Nitro-D-arginine, a nitric oxide synthesis inhibitor, also is a vasodilator that relaxes the smooth muscles and increases blood flow to the penis, improving erections. |
| DETA NONOate
DETA NONOate is an exogenous nitric oxide (NO) donor that activates inward currents in cultured rat cerebellar granule cells and increases cGMP production in vascular smooth muscle cells. |
| Cis-N-Feruloyltyramine
N-cis-Feruloyl tyramine (cis-N-(4-Hydroxyphenethyl) ferulamide) is a natural phenolic compound, exhibits modest inhibitory activity on LPS-activated NO production in RAW 264.7 cells. |
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