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Developing a Drug Screening Platform: MALDI-Mass Spectrometry Imaging of Paper-Based Cultures
Fernando Tobias1, Julie C McIntosh2, Gabriel J LaBonia3
1Department of Chemistry and Biochemistry and the Comprehensive Cancer Center , The Ohio State University , Columbus , Ohio 43210-1132 , United States.
Abstract:
Many potential chemotherapeutics fail to reach patients. One of the key reasons is that compounds are tested during the drug discovery stage in two-dimensional (2D) cell cultures, which are often unable to accurately model in vivo outcomes. Three-dimensional (3D) in vitro tumor models are more predictive of chemotherapeutic effectiveness than 2D cultures, and thus, their implementation during the drug screening stage has the potential to more accurately evaluate compounds earlier, saving both time and money. Paper-based cultures (PBCs) are an emerging 3D culture platform in which cells suspended in Matrigel are seeded into paper scaffolds and cultured to generate a tissue-like environment. In this study, we demonstrate the potential of matrix-assisted laser desorption/ionization-mass spectrometry imaging with PBCs (MALDI-MSI-PBC) as a drug screening platform. This method discriminated regions of the PBCs with and without cells and/or drugs, indicating that coupling PBCs with MALDI-MSI has the potential to develop rapid, large-scale, and parallel mass spectrometric drug screens.
Insights
Three-dimensional (3D) paper-based cultures (PBCs) coupled with matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI) offer a more accurate method for drug screening. This advanced technique can identify drug distribution in tissue-like environments, improving early-stage drug discovery.
Area of Science:
- Biotechnology
- Drug Discovery
- Analytical Chemistry
Background:
- Many chemotherapeutics fail due to inaccurate preclinical testing in 2D cell cultures.
- Three-dimensional (3D) in vitro models offer better prediction of in vivo drug efficacy compared to 2D cultures.
- Early and accurate drug evaluation is crucial for saving time and resources in drug development.
Purpose of the Study:
- To evaluate matrix-assisted laser desorption/ionization-mass spectrometry imaging with paper-based cultures (MALDI-MSI-PBC) as a drug screening platform.
- To demonstrate the capability of MALDI-MSI-PBC in analyzing drug distribution within 3D tissue models.
- To highlight the potential for developing rapid, large-scale, and parallel mass spectrometric drug screens.
Main Methods:
- Utilized paper-based cultures (PBCs) as a 3D in vitro tumor model.
- Employed matrix-assisted laser desorption/ionization-mass spectrometry imaging (MALDI-MSI) to analyze PBCs.
- Developed a method to discriminate regions with and without cells and/or drugs within the PBCs.
Main Results:
- MALDI-MSI successfully differentiated regions within PBCs containing cells and/or drugs.
- The study demonstrated the feasibility of using MALDI-MSI-PBC for analyzing drug presence in a 3D environment.
- The results indicate the potential for high-throughput drug screening using this combined technology.
Conclusions:
- MALDI-MSI-PBC is a promising platform for advancing drug screening methodologies.
- This approach can significantly improve the accuracy of early-stage chemotherapeutic evaluation.
- The integration of PBCs and MALDI-MSI paves the way for more efficient and reliable drug discovery processes.
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