Therapeutic Drug Monitoring Using Two-Dimensional Chromatography System Composed of Two Types of...

Area of Science:

• Analytical Chemistry
• Biochemistry
• Pharmacology

Background:

• Therapeutic drug monitoring (TDM) is essential for optimizing drug efficacy and patient safety.
• Current methods for TDM often involve complex sample preparation and lengthy analysis times.
• There is a need for more efficient and accessible TDM techniques.

Purpose of the Study:

• To develop and evaluate a novel two-dimensional (2D) chromatography system for efficient therapeutic drug monitoring.
• To assess the performance of different secondary column materials in the 2D system.
• To demonstrate the system's capability for direct serum sample analysis without prior preparation.

Main Methods:

• Development of a two-dimensional chromatography system utilizing a primary poly(N-isopropylacrylamide) (PNIPAAm) hydrogel-modified bead-packed column.
• Comparison of two secondary column types: octadecyl silyl (ODS) and PNIPAAm-terminally-modified beads.
• Analysis of serum samples for drug concentration using the developed 2D chromatography systems.
• Evaluation of factors such as separation efficiency, analysis time, and solvent requirements.

Main Results:

• The primary PNIPAAm-hydrogel column effectively separated serum proteins and drugs.
• The secondary ODS column showed limitations including slow elution and requirement for organic solvents.
• The PNIPAAm-terminally-modified secondary column significantly reduced analysis time and eliminated the need for organic solvents.
• The developed 2D system allowed for direct serum drug analysis without deproteination.

Conclusions:

• The novel two-column 2D chromatography system is highly advantageous for therapeutic drug monitoring.
• The system offers a rapid and efficient method for determining drug concentrations in serum.
• This approach simplifies TDM by eliminating the need for sample preparation and organic solvents, enhancing clinical applicability.