Abstract
<p> <p id="x-x-x-x-spar0075"> Abiraterone acetate (AA), the prodrug of abiraterone, is FDA-approved for the treatment of castration-resistant prostate cancer. Abiraterone is metabolized in patients to a more potent analogue, D4A. However, we have recently reported that this analogue is further metabolized to additional metabolites in patients treated with AA. Here, we present a <a href="https://proxy.ulib.csuohio.edu:2062/topics/biochemistry-genetics-and-molecular-biology/liquid-chromatography-tandem-mass-spectrometry" title="Learn more about Liquid Chromatography Tandem Mass Spectrometry from ScienceDirect's AI-generated Topic Pages"> liquid chromatography-tandem mass spectrometry </a> method developed to resolve and detect abiraterone and its seven metabolites in human serum using an AB Sciex Qtrap 5500 mass analyzer coupled with a Shimadzu Nexera UPLC station. Analytes and the internal standard (abiraterone-d4) were extracted from human serum using the <a href="https://proxy.ulib.csuohio.edu:2062/topics/biochemistry-genetics-and-molecular-biology/liquid-liquid-extraction" title="Learn more about Liquid Liquid Extraction from ScienceDirect's AI-generated Topic Pages"> liquid–liquid extraction </a> procedure. The analytes were separated using a Zorbax Eclipse Plus C18 150 × 2.1 mm, 3.5 μm column at 40 °C and an isocratic <a href="https://proxy.ulib.csuohio.edu:2062/topics/biochemistry-genetics-and-molecular-biology/mobile-phase-composition" title="Learn more about Mobile Phase Composition from ScienceDirect's AI-generated Topic Pages"> mobile phase </a> 35% A (0.1% formic acid in water), 65% B (0.1% formic acid in methanol:acetonitrile; 60:40). <a href="https://proxy.ulib.csuohio.edu:2062/topics/biochemistry-genetics-and-molecular-biology/electrospray-ionization" title="Learn more about Electrospray Ionization from ScienceDirect's AI-generated Topic Pages"> Electrospray ionization </a> in positive mode was applied with multiple reaction monitoring in a total run time of 13 min. Abiraterone detection was linear in the range 2–400 ng/mL and all metabolites from 0.1–20 ng/mL. The method was validated following US FDA guidelines for bioanalytical method validation, and all the metabolite results were within the acceptance limits. Despite the similarity in structure and mass transition between the metabolites, the validated method separated all the metabolites, including <a href="https://proxy.ulib.csuohio.edu:2062/topics/biochemistry-genetics-and-molecular-biology/diastereoisomer" title="Learn more about Diastereoisomer from ScienceDirect's AI-generated Topic Pages"> diastereomers </a> , to allow accurate identification and quantitation of each compound. </p></p>
| Original language | American English |
|---|---|
| Journal | Journal of Steroid Biochemistry and Molecular Biology |
| Volume | 172 |
| DOIs | |
| State | Published - Sep 1 2017 |
Keywords
- Prostate cancer; Abiraterone; LC–MS/MS; Method validation;Metabolites
Disciplines
- Analytical Chemistry
- Biochemistry
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