Determination of vinorelbine in rabbit plasma by high-performance liquid chromatography with coulometric detection.
A high-performance liquid chromatographic method was developed for the determination in plasma (400-microliters sample) of a vinca alkaloid, vinorelbine. The analysis was performed by using an octadecylsilane column and heptanesulfonic acid as ion-pairing agent. This method used a new internal standard, teniposide, that permitted a good compromise between sensitivity and retention times (10.6 and 15.5 min for teniposide and vinorelbine, respectively). After a liquid-liquid extraction with diethyl ether, the extracts were injected into a reversed-phase system. The extraction efficiency was approximately 80% for both vinorelbine and the internal standard. The mobile phase was phosphate buffer (pH 3)-acetonitrile-methanol (50:30:20, v/v/v). Using coulometric detection, the limit of detection in plasma (400 microliters) was 1 ng/ml. The intra-assay coefficients of variation were 10.95, 3.80 and 5.71% for 5, 500 and 1000 ng/ml, respectively, and the inter-assay coefficients of variation were 20.14, 14.27 and 10.67% for 5, 500 and 1000 ng/ml, respectively. A linear response was observed for the plasma calibration graph in the ranges 2.5-50 and 50-1000 ng/ml. This method was used to follow the time course of the concentration of vinorelbine in rabbit plasma after a single intravenous dose of vinorelbine (30 mg/m2) and seems to be suitable for studying the pharmacokinetics of vinorelbine in rabbit.
Mouchard-Delmas
C
C
Laboratoire de Pharmacologie, UFR de Pharmacie, Reims, France.
Gourdier
B
B
Vistelle
R
R
D000818:Animals; D000970:Antineoplastic Agents / Q000097:blood* / Q000493:pharmacokinetics; D001932:Brain Neoplasms / Q000378:metabolism; D002851:Chromatography, High Pressure Liquid; D004563:Electrochemistry; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D007275:Injections, Intravenous; D011817:Rabbits; D014747:Vinblastine / Q000031:analogs & derivatives* / Q000097:blood / Q000493:pharmacokinetics; D000077235:Vinorelbine
D000970:Antineoplastic Agents; D007202:Indicators and Reagents; D014747:Vinblastine; D000077235:Vinorelbine