title: Quantitative chromatographic determination of several benzimidazole anthelmintic molecules in parasite material.
abstract: A specific, precise and accurate high-performance liquid chromatographic (HPLC) analytical method has been developed for the quantitative determination of different benzimidazole (BZD) anthelmintics in parasite material (Moniezia benedeni). Mebendazole (MBZ), oxibendazole (OBZ), flubendazole (FLBZ), albendazole (ABZ) ricobendazole (RBZ), albendazole sulphone (ABZSO(2)), fenbendazole (FBZ), oxfendazole (OFZ) and fenbendazole sulphone (FBZSO(2)) were measured simultaneously in M. benedeni, a sheep and cattle cestode parasite used as a model of the biological matrix. The recovery, linearity, precision, accuracy, limits of detection and quantification of the method were determined. Drug extraction from the parasite's tissue homogenate was performed using methanol (liquid phase extraction), and after solvent evaporation, the residual material was cleaned up by solid phase extraction prior to analysis by reversed-phase HPLC. The resolution of all the BZD molecules assayed was obtained on a C(18) reversed-phase (5 microm, 250 mm x 4.6 mm) column using acetonitrile and ammonium acetate as the mobile phase and ultraviolet (UV) detection at 292 nm. Regression analyses for all the BZD compounds assayed were linear at concentrations ranging from 1.61 to 64.21 nmol/100mg protein (triplicate determinations) showing correlation coefficients greater than 0.9922. The developed method is efficient for the simultaneous determination of several benzimidazole anthelmintic molecules in parasite material and useful for the ex vivo and in vivo characterisation of the kinetics of drug uptake/diffusion in target parasites, which seems to be relevant to optimise parasite control both in human and veterinary medicine.
authors: Laboratorio de Farmacología, Departamento de Fisiopatología, Facultad de Ciencias Veterinarias, Universidad Nacional del Centro de la Pcia. de Buenos Aires, Campus Universitario, 7000, Tandil, Argentina.
authors: Lourdes
authors: L
authors: Mottier
authors: Luis
authors: L
authors: Alvarez
authors: Carlos
authors: C
authors: Lanusse
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000032:analysis*; D001562:Benzimidazoles / Q000032:analysis*; D002138:Calibration; D002589:Cestoda / Q000737:chemistry*; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet
chemical_list: D000871:Anthelmintics; D001562:Benzimidazoles