Process quality engineering for bioreactor-driven manufacturing of tissue-engineered constructs for bone regeneration

Area of Science:

• Biomaterials Engineering
• Tissue Engineering
• Regenerative Medicine

Background:

• Clinical translation of tissue-engineered products requires robust manufacturing processes.
• Quality-by-Design (QbD) principles are essential for ensuring product quality and regulatory compliance.
• Osteogenic hybrid scaffolds aim to enhance bone regeneration.

Purpose of the Study:

• To apply QbD principles to an in vitro bioprocess for manufacturing 3D osteogenic hybrid scaffolds.
• To establish a design space for robust production of hybrid scaffolds with desired quality attributes.
• To identify critical process parameters influencing scaffold quality.

Main Methods:

• Utilized human periosteum-derived cells and a bioinstructive medium for scaffold functionalization.
• Employed a perfusion bioreactor for cell matrix deposition on 3D titanium alloy scaffolds.
• Implemented a two-level, three-factor fractional factorial design of experiments.

Main Results:

• Evaluated the impact of flow rate, cell culture duration, and seeding density on collagen production, mineralization, and cell number.
• Identified key process parameters influencing critical quality attributes of the hybrid scaffolds.
• Established a design space for reproducible manufacturing of osteogenic hybrid scaffolds.

Conclusions:

• QbD principles enable the development of reproducible bioprocesses for tissue-engineered constructs.
• Optimized manufacturing processes ensure hybrid scaffolds meet quality standards for clinical use.
• This QbD-based approach facilitates the reliable production of functional osteogenic hybrid scaffolds.