Article
Author: Fridrich, Cary ; Daniels, Thomas ; Li, Lisha ; Taggart, Andrew K. P. ; Mo, Ruowei ; Peukert, Stefan ; Gulgeze Efthymiou, Hatice Belgin ; Abe, Mie ; Barbe, Guillaume ; Buono, Chiara ; Zhang, Xia ; Williams, Eric T. ; Bebernitz, Gregory ; Adachi, Yuichiro ; Ma, Fupeng ; Peng, Yunshan
Atrial fibrillation (AF) is the most common cardiac arrhythmia, and a significant risk factor for ischemic stroke and heart failure. Marketed anti-arrhythmic drugs can restore sinus rhythm, but with limited efficacy and significant toxicities, including potential to induce ventricular arrhythmia. Atrial-selective ion channel drugs are expected to restore and maintain sinus rhythm without risk of ventricular arrhythmia. One such atrial-selective channel target is GIRK1/4 (G-protein regulated inwardly rectifying potassium channel 1/4). Here we describe 14b, a potent GIRK1/4 inhibitor developed to cardiovert AF to sinus rhythm while minimizing central nervous system exposure - an issue with preceding GIRK1/4 clinical candidates.