
IndraLab
Statements
eidos
"This study investigated hERG block by cisapride , dofetilide , terfenadine , sotalol , and E-4031 - positive controls commonly used to demonstrate assay sensitivity - using the manual whole cell patch clamp method and an action potential-like voltage protocol presented at 0.2 Hz ."
reach
"In whole-cell voltage clamp studies we found : 1) 60 muM A-935142 enhanced hERG current in the presence of 150 muM sotalol (57.5 +/-5.8%) to a similar extent as seen with A-935142 alone (55.6 +/-5.1%); 2) 150 muM sotalol blocked hERG current in the presence of 60 muM A-935142 (43.5 +/-1.5%) to a similar extent as that seen with sotalol alone (42.0 +/-3.2%) and 3) during co-application, hERG current enhancement was followed by current blockade."
eidos
"How to resolve disconnect between clinical and experimental data One of the longstanding conundrums related to hERG block by sotalol is that relatively high concentration of drug required to block the channel when assessed in isolated cloned channels expressed in vitro compared to the relatively low plasma concentrations reported in humans that apparently result in substantial QT interval prolongation [ 34,82,115 ] ."