| Bioactivity | QAQ dichloride, a photoswitchable voltage-gated Nav and Kv channels blocker, blocks channels in its trans form (of the azobenzene photoswitch), but not in its cis form. QAQ dichloride is membrane-impermeant and only infiltrates pain-sensing neurons that express endogenous import channels. QAQ dichloride acts as a light-sensitive analgesic and can be used for studying of signaling mechanisms in acute and chronic pain[1][2]. |
| Target | Target: voltage-gated Nav and Kv channels |
| Invitro | QAQ dichloride (100 μM) does not cross the membrane and can be injected into cells through a micropipette to photosensitize a single cell and afford subcellular control of action potential propagation. It blocks Shaker-IR current in the trans configuration and unblocks it in the cis configuration[1].QAQ dichloride can be used to develop red-shifted derivatives of QAQ, powerful doubly charged photochromic blockers.These derivatives allow for remote control of Kv and Nav channel conductance with light and offer the opportunity to silence neuronal activity reversibly[2]. |
| Name | QAQ dichloride |
| Formula | C28H44Cl2N6O2 |
| Molar Mass | 567.59 |
| Transport | Room temperature in continental US; may vary elsewhere. |
| Storage | Please store the product under the recommended conditions in the Certificate of Analysis. |
| Reference | [1]. Timm Fehrentz, et al. Exploring the Pharmacology and Action Spectra of Photochromic Open-Channel Blockers. Chembiochem. 2012 Aug 13;13(12):1746-9. [2]. Alexandre Mourot, et al.Photochromic Potassium Channel Blockers: Design and Electrophysiological Characterization. Methods Mol Biol. 2013;995:89-105. |