Simultaneous Bioanalytical Method Development and Validation of Navitoclax and Doxorubicin in Rat Plasma Using...

Area of Science:

• Analytical Chemistry
• Pharmacology
• Biomedical Science

Background:

• Accurate quantification of therapeutic agents in biological matrices is crucial for drug development.
• Navitoclax and doxorubicin are key components in certain combination therapies requiring precise monitoring.
• Existing methods may lack the sensitivity or specificity needed for complex pharmacokinetic studies.

Purpose of the Study:

• To develop and validate a simple, sensitive, and specific LC-MS/MS method for determining navitoclax and doxorubicin concentrations in rat plasma.
• To establish a reliable bioanalytical tool for preclinical pharmacokinetic and drug metabolism studies.
• To facilitate the assessment of drug-drug interactions and adverse effect potential of combined navitoclax and doxorubicin therapy.

Main Methods:

• Liquid chromatography-tandem mass spectrometry (LC-MS/MS) was employed for analyte detection.
• Protein precipitation was used for sample preparation, followed by vacuum drying and reconstitution.
• A SHIMADZU Shim-pack GIST C-18 column with a mobile phase of acetonitrile/water/formic acid was utilized for separation.
• Ketoconazole and daunorubicin served as internal standards for accurate quantification.

Main Results:

• A simple, sensitive, and specific LC-MS/MS method was successfully developed and validated.
• The method demonstrated robustness and reproducibility, with comprehensive validation according to regulatory guidelines.
• Key validation parameters including specificity, sensitivity, precision, accuracy, and stability were met.

Conclusions:

• The validated LC-MS/MS method provides a reliable tool for quantifying navitoclax and doxorubicin in rat plasma.
• This bioanalytical method can be extended to clinical settings for drug metabolism and pharmacokinetic profiling.
• The method supports the investigation of combination therapies involving navitoclax and doxorubicin, aiding in understanding their safety and efficacy.