Development of thick and highly cell-incorporated engineered tissues by hydrogel template approach with basic...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Previous hydrogel template methods yielded low cell density in engineered tissues.
• Achieving high cell density and uniform morphology in 3D engineered tissues remains a challenge.

Purpose of the Study:

• To develop thick, highly cell-incorporated 3D engineered tissues.
• To investigate the effects of basic fibroblast growth factor (bFGF) and ascorbic acid 2-phosphate (Asc 2-P) on cell proliferation and collagen production.

Main Methods:

• Loading bFGF into poly(gamma-glutamic acid) hydrogels with disulfide cross-links (gamma-PGA-SS gels).
• Culturing fibroblasts within the hydrogel scaffolds.
• Decomposing scaffolds using cysteine to analyze cell proliferation and collagen production.

Main Results:

• bFGF loading significantly enhanced cellular invasion and proliferation within the hydrogels.
• Asc 2-P in the culture medium stimulated collagen production by fibroblasts.
• Engineered tissues showed a 1.3-fold increase in volume and 1.4-fold increase in weight with bFGF treatment.

Conclusions:

• The combination of bFGF and Asc 2-P promotes the development of thick, cell-dense engineered tissues.
• These enhanced 3D engineered tissues show potential as novel cell implantation materials for tissue regeneration.