Simultaneous determination the concentration change of ketoconazole and dexamethasone acetate: application to drug-drug interaction in human keratinocyte.

Journal of Pharmaceutical and Biomedical Analysis
Lingjun LiPengcheng Ma

Abstract

The combination of ketoconazole and dexamethasone acetate is one of the commonly used treatments in dermatology regiment for skin inflammation accompanied by fungal infections. This interaction of ketoconazole and dexamethasone may make the drug much effective, decrease the adverse reaction or toxic effects. At present, there was no information about the interaction of these two external drugs. Therefore, it was necessary to build a model to measure the levels and evaluate the interaction of ketoconazole and dexamethasone acetate in skin cells. In our study, the determination methodology of ketoconazole and dexamethasone acetate in human keratinocyte (HaCaT cells) was established and the interaction of these two drugs in cells was explored. HaCaT cells were cultured in medium containing ketoconazole, then they were sequentially cultured with or without dexamethasone acetate treatment for another 1, 2, 4, 8 and 12 h. The samples were then harvested and the concentrations were quantified by enhanced BCA (the bicinchoninic acid) protein assay. Furthermore, the analytes in the cell suspension were also prepared and analyzed by LC-MS method. As a result, ketoconazole and dexamethasone acetate were detected at the concentration range...Continue Reading

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