Tunable Hybrid Biopolymeric Hydrogel Scaffolds Based on Atomic Force Microscopy Characterizations for Tissue...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Nanotechnology

Background:

• Biopolymeric hydrogels are promising scaffolds for tissue engineering due to biocompatibility and biodegradability.
• Characterizing hydrogel scaffolds at the micro/nanoscale is crucial for understanding cell-scaffold interactions.
• Atomic Force Microscopy (AFM) offers advanced capabilities for nanoscale material characterization.

Purpose of the Study:

• To develop tunable hybrid natural biopolymer hydrogel scaffolds.
• To characterize the structural and mechanical properties of these hydrogels using AFM.
• To investigate the application of these hydrogel scaffolds in tissue engineering and cell-scaffold interactions.

Main Methods:

• Fabrication of hybrid natural biopolymer hydrogel scaffolds from sodium alginate and gum arabic cross-linked with calcium cations.
• Characterization of scaffold morphology and mechanical properties (Young's modulus, adhesion force) using AFM peak force tapping imaging.
• Evaluation of hydrogel scaffold degradation dynamics at the nanoscale via AFM.
• Assessment of cell-scaffold interactions using three different cell types.

Main Results:

• AFM imaging confirmed the formation of porous hydrogel scaffolds.
• Tunable structural and mechanical properties were achieved by altering component ratios.
• AFM revealed nanoscale dynamics during hydrogel degradation.
• The fabricated hydrogel scaffolds promoted the formation of cellular spheroids.

Conclusions:

• Hybrid natural biopolymer hydrogels can be designed with tunable properties for tissue engineering applications.
• AFM is a powerful tool for characterizing hydrogel scaffolds and understanding cell-scaffold interactions at the nanoscale.
• These tunable hydrogel scaffolds show potential for advancing tissue engineering by facilitating cellular organization.