A comparative study of seeding techniques and three-dimensional matrices for mesenchymal cell attachment

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Cell Biology

Background:

• Mesenchymal stem cells (MSCs) are multipotent cells with significant potential for tissue engineering.
• Optimizing MSC behavior during the initial seeding phase is crucial for successful tissue construct development.

Purpose of the Study:

• To evaluate the behavior of mesenchymal stem cells (MSCs) during the seeding phase onto various scaffold materials.
• To compare the efficacy of four different seeding techniques on cell attachment, viability, and distribution.

Main Methods:

• Four seeding techniques were tested: spinner flask, vacuum system with perfused bioreactor, vacuum system with orbital shaker, and orbital shaker.
• Four scaffold materials were used: polyglycolic acid, poly(lactic acid), calcium phosphate, and chitosan-hyaluronic acid.
• Cell attachment, viability, DNA quantification, and distribution via SEM were assessed.

Main Results:

• Dynamic seeding in a spinner flask enhanced cellularity in polymer scaffolds, particularly mesh types.
• Bone marrow-derived MSCs showed higher affinity for hydrophobic calcium phosphate scaffolds, irrespective of seeding method.
• MSCs exhibited aggregation into sheets, potentially hindering uniform distribution within scaffold pores.

Conclusions:

• The cell loading method significantly impacts cell delivery to scaffolds.
• Scaffold material properties, such as hydrophobicity, influence MSC attachment.
• Understanding MSC seeding behavior is vital for designing effective tissue engineering strategies.