Development of high-performance liquid chromatographic determination of salicylaldehyde isonicotinoyl hydrazone in rabbit plasma and application of this method to an in vivo study.
An analytical methodology appropriate for the determination of the novel drug candidate salicylaldehyde isonicotinoyl hydrazone (SIH) in rabbit plasma has been developed and validated. Desirable chromatographic separation was achieved on a C18 column employing a mixture of phosphate buffer (0.01 M NaH2PO4 x 2 H2O with 2 mM EDTA, pH 6.0) and methanol (53:47; v/v) as the mobile phase. In order to develop a suitable sample preparation procedure, different methods have been tested (solid-phase extraction, liquid-liquid extraction, and protein precipitation). Protein precipitation using 0.1 M HClO4 and acetonitrile allowed the highest recoveries of the analyte to be reproducibly attained. The analytical methodology developed in this study was validated with respect to linearity (0.26-30.0 microg/mL), accuracy, precision, selectivity, recovery, and stability. A concentration of 0.26 microg/mL was determined as the LLOQ. The chromatographic method was applied to a preliminary plasma pharmacokinetic study. This study has provided the first information about the concentrations of SIH in plasma of a living subject. These results could have a significant impact on further progress in the development of this promising compound.
Kovaríková
Petra
P
Department of Pharmaceutical Chemistry and Drug Control, Faculty of Pharmacy in Hradec Králové, Charles University in Prague; Hradec Králové, Czech Republic. kovarikova@faf.cuni.cz
Klimes
Jirí
J
Stĕrba
Martin
M
Popelová
Olga
O
Mokrý
Milan
M
Gersl
Vladimír
V
Ponka
Premysl
P
D000447:Aldehydes / Q000097:blood*; D000818:Animals; D001774:Blood Chemical Analysis / Q000379:methods / Q000592:standards / Q000706:statistics & numerical data; D002851:Chromatography, High Pressure Liquid / Q000379:methods* / Q000592:standards / Q000706:statistics & numerical data; D004355:Drug Stability; D006835:Hydrazones / Q000097:blood*; D007502:Iron Chelating Agents / Q000032:analysis; D008297:Male; D011786:Quality Control; D011817:Rabbits
D000447:Aldehydes; D006835:Hydrazones; D007502:Iron Chelating Agents; C413684:salicylaldehyde isonicotinoyl hydrazone