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A Multicellular 3D GelMA-Based Colorectal Cancer Model for Chemotherapeutic Responses.

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  • 1Department of Molecular Biology and Genetics, University of Health Sciences Turkey, Istanbul, Türkiye.

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Summary

This study developed a 3D colorectal cancer (CRC) model using biomaterials to improve drug screening. The advanced 3D model better mimics the tumor microenvironment, offering more accurate preclinical drug testing than traditional 2D cultures.

Keywords:
3D cell cultureGelMA hydrogelcolorectal cancerdrug screeningin vitro modelingtumor microenvironment

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Area of Science:

  • Biomaterials Science
  • Cancer Research
  • Tissue Engineering

Background:

  • Conventional 2D cell cultures have limited predictive power for colorectal cancer (CRC) drug screening.
  • There is a need for advanced in vitro platforms that better recapitulate the tumor microenvironment.

Purpose of the Study:

  • To develop a biomimetic, multicellular 3D CRC model using gelatin methacrylate (GelMA) hydrogels.
  • To create a platform that integrates vascularized compartments with cancer cells, fibroblasts, and macrophages for controlled tumor-stroma-vessel interactions.
  • To assess the platform's capability for preclinical CRC drug screening.

Main Methods:

  • Fabrication and comprehensive characterization of GelMA hydrogels.
  • Integration of human endothelial cells, cancer-associated fibroblasts, and macrophages within the hydrogel.
  • Evaluation of GelMA hydrogels' role in endothelial cell behavior (viability, migration, angiogenic markers).
  • Assessment of drug screening capability using 5-fluorouracil (5-FU) in 3D vs. 2D cultures.

Main Results:

  • The 3D CRC model successfully recapitulated key structural and biological features of the tumor microenvironment.
  • GelMA hydrogels modulated endothelial viability, migration, and angiogenic marker expression.
  • 3D cultures showed attenuated cytotoxicity, oxidative stress, and apoptosis compared to 2D cultures when treated with 5-FU.
  • The GelMA-based microenvironment actively modulated cellular drug responses via multicellular interactions and diffusion.

Conclusions:

  • The developed 3D in vitro platform offers improved physiological relevance and predictive capability for CRC drug screening.
  • This biomimetic model provides a human-relevant alternative to traditional methods, aligning with the 3Rs principles.
  • The study highlights the importance of the tumor microenvironment in modulating drug responses.