A Self-Assembled Matrix System for Cell-Bioengineering Applications in Different Dimensions, Scales, and Geometries

Area of Science:

• Biomaterials Science
• Stem Cell Biology
• Tissue Engineering

Background:

• Stem cell bioengineering and therapy necessitate adaptable model systems and materials.
• A unified, chemically defined biomatrix can reduce variability across different experimental setups.

Purpose of the Study:

• To identify an optimal biomatrix for 2D human mesenchymal stromal cell (hMSC) culture and osteogenesis.
• To demonstrate the utility of this biomatrix in various bioengineering applications, including scaffold coating, gene delivery, and 3D culture.

Main Methods:

• Coacervation-mediated self-assembly was used to synthesize and screen biomaterials.
• The identified biomatrix was tested for 2D hMSC culture, osteogenesis, bioactive glass scaffold coating, nanoparticle synthesis for gene silencing (SOX-9), 3D cell culture, co-culture models (hMSC/HUVEC), and 3D bioprinting.

Main Results:

• A biomatrix optimal for 2D hMSC culture and osteogenesis was identified.
• The biomatrix facilitated hMSC bioengineering, including coating bioactive glass scaffolds and efficient esiRNA delivery for SOX-9 gene knockdown.
• The system supported 3D cell culture, angiogenesis models, 3D bioprinting, and induced apatite crystal formation on bioactive glass scaffolds, mimicking bone structures.

Conclusions:

• The self-assembled biomatrix system is versatile for diverse bioengineering applications across different dimensions, scales, and geometries.
• This system holds significant potential for advancing stem cell therapy and tissue regeneration strategies.