Aspects of albendazole metabolism in western lowland gorillas (Gorilla gorilla gorilla) compared to humans and other species assessed by HPLC, LC-MS, and chiral electrokinetic chromatography

Theurillat, Regula; Stirnimann, Guido; Wenker, Christian; Hoby, Stefan; Thormann, Wolfgang (2021). Aspects of albendazole metabolism in western lowland gorillas (Gorilla gorilla gorilla) compared to humans and other species assessed by HPLC, LC-MS, and chiral electrokinetic chromatography. Separation science plus, 4(9), pp. 347-356. Wiley 10.1002/sscp.202100024

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The benzimidazole anthelmintic drug albendazole becomes metabolized to chiral albendazole sulfoxide, albendazole sulfone, albendazole 2-aminosulfone, and other metabolites. High-performance liquid chromatography with UV absorbance and fluorescence detection, liquid chromatography with mass spectrometry, and chiral electrokinetic chromatography were used to analyze albendazole metabolites in extracts of western lowland gorilla (Gorilla gorilla gorilla) plasma of patients with alveolar echinococcosis and the data are compared to those obtained with human patient samples and to those reported for other species in the literature. The data revealed that the albendazole sulfoxide to albendazole sulfone concentration ratio in gorilla plasma is significantly smaller compared to that in samples of men, rats, dogs, and cattle. It is, however, similar to what was observed in sheep and goats. The (+)-albendazole sulfoxide to (−)-albendazole sulfoxide enantiomeric ratio in gorilla blood determined by chiral electrokinetic chromatography was found to be >1 which is comparable to what was observed in humans, dogs, sheep, goats, and cattle but different to mice and rats. Furthermore, the electrokinetic chromatography data suggest that small amounts of albendazole 2-aminosulfone may be present in plasma of gorillas and humans. The data gathered with the various separation-based assays illustrate the value of technology featuring different analyte separation and detection principles. This is the first account describing aspects of the albendazole metabolism in gorillas.

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