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Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects
PURPOSE: To evaluate the mass balance, metabolic disposition, and pharmacokinetics of a single dose of regorafenib in healthy volunteers. In addition, in vitro metabolism of regorafenib in human hepatocytes was investigated. METHODS: Four healthy male subjects received one 120 mg oral dose of regora...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Springer Berlin Heidelberg
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5754413/ https://www.ncbi.nlm.nih.gov/pubmed/29188322 http://dx.doi.org/10.1007/s00280-017-3480-9 |
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author | Gerisch, Michael Hafner, Frank-Thorsten Lang, Dieter Radtke, Martin Diefenbach, Konstanze Cleton, Adriaan Lettieri, John |
author_facet | Gerisch, Michael Hafner, Frank-Thorsten Lang, Dieter Radtke, Martin Diefenbach, Konstanze Cleton, Adriaan Lettieri, John |
author_sort | Gerisch, Michael |
collection | PubMed |
description | PURPOSE: To evaluate the mass balance, metabolic disposition, and pharmacokinetics of a single dose of regorafenib in healthy volunteers. In addition, in vitro metabolism of regorafenib in human hepatocytes was investigated. METHODS: Four healthy male subjects received one 120 mg oral dose of regorafenib containing approximately 100 µCi (3.7 MBq) [(14)C]regorafenib. Plasma concentrations of parent drug were derived from HPLC–MS/MS analysis and total radioactivity from liquid scintillation counting (LSC). Radiocarbon analyses used HPLC with fraction collection followed by LSC for all urine samples, plasma, and fecal homogenate extracts. For the in vitro study, [(14)C]regorafenib was incubated with human hepatocytes and analyzed using HPLC–LSC and HPLC–HRMS/MS. RESULTS: Regorafenib was the major component in plasma, while metabolite M-2 (pyridine N-oxide) was the most prominent metabolite. Metabolites M-5 (demethylated pyridine N-oxide) and M-7 (N-glucuronide) were identified as minor plasma components. The mean concentration of total radioactivity in plasma/whole blood appeared to plateau at 1–4 h and again at 6–24 h post-dose. In total, 90.5% of administered radioactivity was recovered in the excreta within a collection interval of 12 days, most of which (71.2%) was eliminated in feces, while excretion via urine accounted for 19.3%. Regorafenib (47.2%) was the most prominent component in feces and was not excreted into urine. Excreted metabolites resulted from oxidative metabolism and glucuronidation. CONCLUSIONS: Regorafenib was eliminated predominantly in feces as well as by hepatic biotransformation. The multiple biotransformation pathways of regorafenib decrease the risk of pharmacokinetic drug–drug interactions. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00280-017-3480-9) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-5754413 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-57544132018-01-22 Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects Gerisch, Michael Hafner, Frank-Thorsten Lang, Dieter Radtke, Martin Diefenbach, Konstanze Cleton, Adriaan Lettieri, John Cancer Chemother Pharmacol Original Article PURPOSE: To evaluate the mass balance, metabolic disposition, and pharmacokinetics of a single dose of regorafenib in healthy volunteers. In addition, in vitro metabolism of regorafenib in human hepatocytes was investigated. METHODS: Four healthy male subjects received one 120 mg oral dose of regorafenib containing approximately 100 µCi (3.7 MBq) [(14)C]regorafenib. Plasma concentrations of parent drug were derived from HPLC–MS/MS analysis and total radioactivity from liquid scintillation counting (LSC). Radiocarbon analyses used HPLC with fraction collection followed by LSC for all urine samples, plasma, and fecal homogenate extracts. For the in vitro study, [(14)C]regorafenib was incubated with human hepatocytes and analyzed using HPLC–LSC and HPLC–HRMS/MS. RESULTS: Regorafenib was the major component in plasma, while metabolite M-2 (pyridine N-oxide) was the most prominent metabolite. Metabolites M-5 (demethylated pyridine N-oxide) and M-7 (N-glucuronide) were identified as minor plasma components. The mean concentration of total radioactivity in plasma/whole blood appeared to plateau at 1–4 h and again at 6–24 h post-dose. In total, 90.5% of administered radioactivity was recovered in the excreta within a collection interval of 12 days, most of which (71.2%) was eliminated in feces, while excretion via urine accounted for 19.3%. Regorafenib (47.2%) was the most prominent component in feces and was not excreted into urine. Excreted metabolites resulted from oxidative metabolism and glucuronidation. CONCLUSIONS: Regorafenib was eliminated predominantly in feces as well as by hepatic biotransformation. The multiple biotransformation pathways of regorafenib decrease the risk of pharmacokinetic drug–drug interactions. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s00280-017-3480-9) contains supplementary material, which is available to authorized users. Springer Berlin Heidelberg 2017-11-29 2018 /pmc/articles/PMC5754413/ /pubmed/29188322 http://dx.doi.org/10.1007/s00280-017-3480-9 Text en © The Author(s) 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Original Article Gerisch, Michael Hafner, Frank-Thorsten Lang, Dieter Radtke, Martin Diefenbach, Konstanze Cleton, Adriaan Lettieri, John Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects |
title | Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects |
title_full | Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects |
title_fullStr | Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects |
title_full_unstemmed | Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects |
title_short | Mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects |
title_sort | mass balance, metabolic disposition, and pharmacokinetics of a single oral dose of regorafenib in healthy human subjects |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5754413/ https://www.ncbi.nlm.nih.gov/pubmed/29188322 http://dx.doi.org/10.1007/s00280-017-3480-9 |
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