qx314

QX 314 (Lidocaine N-ethyl bromide) is a blocker of non-membrane-permeable,and Inhibits Acid-Induced Activation of Esophageal Nociceptive C Fiber Neurons.

QX-314 chloride is a membrane-impermeable, permanently charged blocker of the sodium channel.

Most local anesthetics act by abolishing voltage gated sodium channel currents indiscriminately in all populations of neurons. Selective analgesia through TRPV1-mediated entry of a cationic lidocaine derivative, QX314, was recently reported. CAY10568 is a physically smaller, less hydrophobic version of QX314 designed to be even more permeable to TRPV1 ion channel when activated by agonists such as capsaicin and N-oleoyl dopamine. CAY10568 when given in combination with suitable TRPV1 agonists should produce selective blockade of the pain response while leaving motor, touch, and proprioception intact.