"Organ-in-a-Column" Coupled On-line with Liquid Chromatography-Mass Spectrometry

Area of Science:

• Biotechnology
• Pharmacology
• Analytical Chemistry

Background:

• Organoids, derived from stem cells, are valuable models for organ physiology and disease research.
• On-line analysis of organoids using mass spectrometry offers enhanced analytical capabilities and automation.
• Integrating organoids with analytical instruments is crucial for advancing drug development and personalized medicine.

Purpose of the Study:

• To develop and validate an automated system for on-line drug metabolism analysis using liver organoids coupled with liquid chromatography-mass spectrometry (LC-MS).
• To demonstrate the feasibility of the "organ-in-a-column" approach for real-time monitoring of drug metabolism.
• To establish a robust platform for studying drug pharmacokinetics and pharmacodynamics.

Main Methods:

• Induced pluripotent stem cell (iPSC)-derived liver organoids were loaded into liquid chromatography column housings with glass beads to ensure even distribution and prevent clogging.
• "Organ-in-a-column" units were coupled on-line with LC-MS for direct analysis.
• Heroin was introduced to the "organ-in-a-column" system, and its Phase I metabolism was monitored in real-time using a triple quadrupole MS instrument.

Main Results:

• The study successfully demonstrated the on-line coupling of liver organoids with LC-MS.
• Enzymatic metabolism of heroin by the liver organoids was detected and monitored in real-time.
• The "organ-in-a-column" system provided automated and selective tracking of drug metabolism over time.

Conclusions:

• The developed "organ-in-a-column" technology enables direct integration of liver organoids with LC-MS.
• This innovative approach facilitates automated and selective tracking of drug metabolism, offering a powerful tool for drug development.
• The system serves as a proof-of-concept for on-line analysis of organoid-based drug metabolism studies.