Determination of the rifamycin antibiotics rifabutin, rifampin, rifapentine and their major metabolites in human plasma via simultaneous extraction coupled with LC/MS/MS

作者：Winchester Lee C; Podany Anthony T^*; Baldwin Joshua S; Robbins Brian L; Fletcher Courtney V

来源：Journal of Pharmaceutical and Biomedical Analysis, 2015, 104: 55-61.

DOI：10.1016/j.jpba.2014.11.011

• Rifampin
• Rifabutin
• Rifapentine
• Bioanalysis
• Tuberculosis

A novel assay using high pressure liquid chromatography (HPLC) coupled to mass spectrometer (MS) detection was developed and validated for the rifamycin anti-tuberculosis antibiotics rifampicin (RIF), rifabutin (RBT), rifapentine (RPT) and their active desacetyl metabolites (dRIF, dRBT and dRPT, respectively) in human plasma. The assay uses 50 mu L of human plasma with a quick and simple protein-precipitation extraction to achieve a dynamic range of 75-30,000 ng/mL for RIF, RBT and RPT and 37.5-15,000 ng/mL for dRIF, dRBT and dRPT, respectively. The average %CV and %deviation were less than 20% at the lower limit of quantitation and less than 15% over the range of the curve. The method was fully validated according to FDA criteria for bioanalytical assays and has successfully been used to support three large international tuberculosis trials.

• 出版日期2015-2-10