Development and validation of an LC-MS/MS method for determination of a novel anticancer agent (CPI-613) in human plasma

Author:

Reddy Nageswara Rao1ORCID,Reddy Vijay1,Boteju Asela1,Boteju Lakmal1,Voelker Troy2,Liu Sherry2,Hu Ke1

Affiliation:

1. Rafael Pharmaceuticals, Inc., 1 Duncan Drive, Cranbury, NJ 08512, USA

2. Covance Laboratories, Salt Lake City, UT 84124, USA

Abstract

Background: This article describes the development and validation of a bioanalytical assay to quantify CPI-613 and its major metabolites, CPI-2850 and CPI-1810, in human plasma matrix using LC-MS/MS. Methodology: Sample extraction procedure following protein precipitation with acetonitrile was optimized to extract all three analytes from plasma with maximum recovery. The final extracted supernatants were diluted with water and injected onto an Xbridge C18 (50 × 2.1 mm; 5 μm) column for analysis. The analytes were separated by a gradient elution, and detection was performed on a triple quadrupole mass spectrometer (Sciex API 5000) operating in the negative ion mode. Results: The assay was linear over a range of 50–50,000 ng/ml for CPI-613, 250–250,000 ng/ml for CPI-2850 and 10–10,000 ng/ml for CPI-1810. Benchtop stability was established for 24 h, and four freeze–thaw cycles were evaluated for CPI-613 and its metabolites. Long-term freezer (-60 to -80°C) stability for about 127 days was established in this validation. Mean matrix recovery was more than 80% for all analytes. Conclusion: A robust LC-MS/MS method was developed for the quantification of CPI-613 and its major metabolites. The current assay will be used to support ongoing and future CPI-613 clinical trials.

Publisher

Future Science Ltd

Subject

Medical Laboratory Technology,Clinical Biochemistry,General Pharmacology, Toxicology and Pharmaceutics,General Medicine,Analytical Chemistry

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