CYP2D6-Dependent Bufuralol 1-Hydroxylation Assayed by Reverse-Phase Ion-Pair High-Performance Liquid Chromatography With Fluorescence Detection

A reverse-phase, high-performance liquid chromatography method is described for the quantification of 1′-hydroxybufuralol formed enzymatically by the incubation of bufuralol with cDNA-expressed CYP2D6 or human liver microsomes. Analytical separation is achieved using a C₁₈ column and a mobile phase consisting of 30% acetonitrile and 2 mM perchloric acid, with detection by fluorescence using an excitation wavelength of 252 nm and an emission wavelength of 302 nm. This method is applicable to enzymatic studies for determination of CYP2D6-catalyzed bufuralol 1′-hydroxylation activity.