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Sample Preparation Strategies for Mass Spectrometry Imaging of 3D Cell Culture Models
08:14

Sample Preparation Strategies for Mass Spectrometry Imaging of 3D Cell Culture Models

Published on: December 5, 2014

Evaluation of therapeutics in three-dimensional cell culture systems by MALDI imaging mass spectrometry

Xin Liu1, Eric M Weaver, Amanda B Hummon

  • 1University of Notre Dame, 251 Nieuwland Science Hall, Notre Dame, Indiana 46556, USA.

Analytical Chemistry
|June 4, 2013
PubMed

Insights

Matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) visualizes anticancer drug penetration in 3D tumor models. This method improves drug distribution assessment in multicellular spheroids, offering a faster, cost-effective alternative to animal studies.

Area of Science:

  • Pharmacology and Drug Development
  • Cancer Research
  • Analytical Chemistry

Background:

  • Effective chemotherapy relies on drug penetration into solid tumors; inadequate penetration can lead to cancer recurrence.
  • Three-dimensional (3D) cell cultures are valuable models, but methods for evaluating anticancer drug distribution are limited.
  • Assessing drug distribution in 3D models is crucial for understanding treatment efficacy and optimizing drug discovery.

Purpose of the Study:

  • To apply matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) for assessing anticancer drug distribution in 3D cell cultures.
  • To visualize the time-dependent penetration and localization of irinotecan and its metabolites in HCT 116 colon carcinoma multicellular spheroids.
  • To establish a novel, efficient method for evaluating drug penetration and distribution in preclinical cancer models.

Main Methods:

  • Utilized matrix-assisted laser desorption/ionization imaging mass spectrometry (MALDI-IMS) on HCT 116 colon carcinoma multicellular spheroids.
  • Investigated the distribution of the anticancer drug irinotecan and its metabolites over time.
  • Validated metabolite identities using nanoflow liquid chromatography-tandem mass spectrometry (nLC-MS/MS) on spheroid extracts.

Main Results:

  • Successfully visualized the time-dependent penetration and spatial distribution of irinotecan within 3D spheroids using MALDI-IMS.
  • Mapped the localization of the parent drug and three key metabolites.
  • Identified a total of ten metabolites using nLC-MS/MS, confirming findings from MALDI-IMS.

Conclusions:

  • MALDI-IMS provides a powerful tool for measuring drug penetration and distribution in 3D cell culture models.
  • This approach offers a more cost-effective and time-efficient alternative to traditional animal models for pharmaceutical testing.
  • The developed methodology enhances the evaluation of anticancer drug efficacy in a preclinical setting.

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