A-803467 is a potent and selective Nav1.8 sodium channel blocker. A-803467 blocks Nav1.8 in both half-maximal inactive and resting states with an IC50 of 8 nM and IC50 of 79 nM, respectively. A-803467 is >100-fold selective vs. human Na(v)1.2, Na(v)1.3, Na(v)1.5, and Na(v)1.7 (IC50 values >or=1 microM). Administration of A-803467 (10-30 mg/kg i.v.) reduced mechanically evoked (10-g von Frey hair) and spontaneous WDR neuronal activity in SNL rats. A-803467 also dose-dependently reduced mechanical allodynia in a variety of rat pain models. A-803467 is the first small-molecule blocker of sodium channels which showing both high potency and significant subtype-selectivity among the sodium channel family.
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Source | Sci Rep (2017). Figure 6. A-803467 |
| Method | Measurement of LSG function | |
| Cell Lines | Left stellate ganglion | |
| Concentrations | 20 mM | |
| Incubation Time | - | |
| Results | As shown in Fig. 6A, the ganglion neurons in the DMSO group were mostly stained positive for TH (red) and negative for TUNEL (green). However, in the high-concentration A-803467 treatment group, most ganglion neurons stained positive for both TH and TUNEL. |
| Molecular Weight | 357.79 |
| Formula | C19H16ClNO4 |
| CAS Number | 944261-79-4 |
| Solubility (25°C) | DMSO 38 mg/mL |
| 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.
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ASN008 is a permanently positively charged sodium channel blocker. |
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Psalmotoxin 1 (PcTx1) is a protein toxin that can bind at subunit-subunit interfaces of acid-sensing ion channel 1a (ASIC1a). |
| Jingzhaotoxin-III
Jingzhaotoxin-III is a potent and selective blocker of Nav1.5 channels, with an IC50 of 348 nM, and shows no effect on other sodium channel isoforms. |
| Huwentoxin-IV
Huwentoxin-IV is a potent and selective sodium channel blocker, inhibits neuronal Nav1.7, Nav1.2, Nav1.3 and Nav1.4 with IC50s of 26, 150, 338 and 400 nM, respectively. |
| Phrixotoxin 3
Phrixotoxin 3 is a potent blocker of voltage-gated sodium channels, with IC50s of 0.6, 42, 72, 288, 610 nM for NaV1.2, NaV1.3, NaV1.4, NaV1.1 and NaV1.5, respectively. |
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