| Bioactivity | QX-222 chloride, a trimethyl analogue of Lignocaine (HY-B0185), is a potent Na+ channel blocker[1][2][3]. |
| Invitro | Twelve minutes after external application of 500 μM QX222 chloride, μ1 IP-Loop to Heart Sequence (μ1-Y401C) results in a significant block compared with μ1-WT (WT, 14.2±1.6% block, n = 8; Y401C, 45.2±3.6% block, n = 9; P < 0.001)[1]. |
| In Vivo | QX-222 (10 mg/kg; intravenous infusion 7 days) chloride reverses spinal nerve ligation (SNL)-induced thermal hypersensitivity and induced antinociception in sham-operated rats[2]. |
| Name | QX-222 chloride |
| CAS | 5369-00-6 |
| Formula | C13H21ClN2O |
| Molar Mass | 256.77 |
| Appearance | Solid |
| Transport | Room temperature in continental US; may vary elsewhere. |
| Storage | 4°C, sealed storage, away from moisture *In solvent : -80°C, 6 months; -20°C, 1 month (sealed storage, away from moisture) |
| Reference | [1]. A Sunami, et al. A critical residue for isoform difference in tetrodotoxin affinity is a molecular determinant of the external access path for local anesthetics in the cardiac sodium channel. Proc Natl Acad Sci U S A. 2000 Feb 29;97(5):2326-31. [2]. Qingmin Chen, et al. Differential blockade of nerve injury-induced thermal and tactile hypersensitivity by systemically administered brain-penetrating and peripherally restricted local anesthetics. J Pain. 2004 Jun;5(5):281-9. [3]. J A Flatman, et al. Reversibility of Ia EPSP investigated with intracellularly iontophoresed QX-222. J Neurophysiol. 1982 Aug;48(2):419-30. |