Water-Templated, Polysaccharide-rich Bioartificial 3D Microarchitectures as Extra-Cellular Matrix Bioautomatons

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Cancer Research

Background:

• The human extracellular matrix (ECM) is crucial for cell behavior and tissue development.
• Current 3D cell culture models often fail to accurately recapitulate the native ECM environment.
• Developing biomimetic scaffolds is essential for advancing cancer research and drug discovery.

Purpose of the Study:

• To engineer a novel 3D microarchitecture using water molecules to mimic the human extracellular matrix (ECM).
• To evaluate the scaffold's ability to support 3D tumor spheroid growth and self-remodeling.
• To assess the utility of the developed matrix for anticancer drug screening and precision oncology.

Main Methods:

• Utilizing the "quasi-spherical" shape of water molecules as a porogen to create polysaccharide-rich, chemically defined 3D-microarchitectures with semi-interpenetrating networks (S-IPNs).
• Characterizing the viscoelastic properties and fibroporous morphology of the engineered scaffolds.
• Culturing human adenocarcinoma (DLD-1) and glioblastoma (U-251) cells to form 3D tumor spheroids on the matrix.
• Performing anticancer drug screening using Etoposide and Camptothecin, and evaluating scaffold transparency.

Main Results:

• The engineered 3D microarchitecture successfully recapitulated a true human ECM, promoting instructive self-remodeling.
• Uniform and reproducible 3D tumor spheroids were formed, with specific Z-depths for DLD-1 and U-251 cells.
• Anticancer drug screening revealed differential drug efficacy, with potential explanations for observed resistance or reduced efficacy.
• The exceptional transparency of the composite affirmed its potential for real-time, high-content phenotypic precision oncology.

Conclusions:

• The novel 3D microarchitecture effectively mimics the ECM, providing a biomimetic environment for 3D tumor spheroid growth.
• The scaffold demonstrates utility as a platform for anticancer drug screening and advancing precision oncology.
• This ECM bioautomaton represents a significant advancement in bioartificial scaffold engineering for cancer research.