Related Experiment Video
Updated: Apr 17, 2026

Preparation of Peripheral Blood Mononuclear Cell Pellets and Plasma from a Single Blood Draw at Clinical Trial Sites for Biomarker Analysis
Published on: March 20, 2021
Regulatory and scientific considerations in PK and biomarker assay validation: lessons from bioanalytical practice
Ruwini D Rajapaksha1, John T Farmer1
1Immunology and Large Molecule Bioanalytical Chemistry, Lovelace Biomedical Research Institute, Albuquerque, NM, USA.
Abstract:
Bioanalytical method validation is a foundation of drug development, ensuring that pharmacokinetic (PK), toxicokinetic (TK), and biomarker assays produce accurate, precise, reliable, and decision-enabling data. Over the past several decades, advances in analytical technologies including ligand-binding assays (LBAs) and liquid chromatography-tandem mass spectrometry (LC-MS/MS) platforms have transformed the field of bioanalysis. Regulatory guidance from the U.S. Food and Drug Administration (FDA), the European Medicines Agency (EMA), and the International Council for Harmonization (ICH) has evolved to reflect these advancements. This review provides a comprehensive comparison of PK and biomarker assay validation, highlighting critical parameters such as selectivity, sensitivity, calibration, accuracy, precision, dilution/parallelism, specificity, and stability. Best practice recommendations are provided for method development, qualification, and validation, with a focus on fit-for-purpose (FFP) approaches and context-of-use (CoU) considerations. Areas of ambiguity in current regulatory expectations for biomarker validations, common pitfalls encountered during regulatory interactions, and emerging trends in bioanalysis are also reviewed. This review paper aims to guide bioanalytical scientists in developing robust, compliant assays that support regulatory submissions and facilitate informed drug development decisions.
More Related Videos
08:31Biosensor-based High Throughput Biopanning and Bioinformatics Analysis Strategy for the Global Validation of Drug-protein Interactions
Published on: December 1, 2020
07:43Author Spotlight: Addressing Regulatory Gaps in Molecular Studies by Quantifying Viral Vectors in Complex Matrices
Published on: July 14, 2023
Related Concept Videos
Measurement of Bioavailability: Pharmacodynamic Methods
Dosage Regimens: Partial Pharmacokinetic Parameters
Measurement of Bioavailability: Pharmacokinetic Methods
Pharmacokinetic Models: Comparison and Selection Criterion
Physiological models take a detailed approach by considering specific molecular processes. They can predict drug distribution, metabolism, and elimination changes, providing a comprehensive understanding of how drugs interact with the body.
Bioavailability Study Design: Healthy Subjects Versus Patients
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
Non-controlled studies, commonly employed for initial exploration, lack a control group, rendering them susceptible to biases and external influences. In contrast,...