Joseph A Tweed, Fern Adams-Dam, Jane Allanson, Kevin Holmes, Ryan Senior, Hongmei Xu, Mengyao Li, Gavin Bennett, Phil Jeffrey
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Bioanalysis of the Bicycle® toxin conjugate BT5528 and released monomethyl auristatin E via liquid chromatography-tandem mass spectrometry.
Background: The Bicycle® toxin conjugate BT5528 is a novel peptide therapeutic conjugated to the cytotoxic agent monomethyl auristatin E (MMAE). A bioanalytical assay was developed to quantify BT5528 and unconjugated MMAE in human plasma. Methodology: BT5528 quantitation used a protein precipitation procedure followed by LC-MS/MS detection. Quantitation of MMAE required a selective offline and online solid-phase extraction with detection via LC-MS/MS. Results: BT5528 was quantified over the assay range of 5-2500 ng/ml and free MMAE was quantified over the assay range of 0.05-50 ng/ml. Conclusion: Bioanalytical methods were used in the bioanalysis of intact BT5528 and released MMAE, in a phase I/IIa clinical trial; to date, over 2000 human patient samples have been analyzed.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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