Visualizing feasible operating ranges within tissue engineering systems using a "windows of operation" approach: a...

Area of Science:

• Biomaterials Science
• Tissue Engineering
• Bioreactor Technology

Background:

• Tissue engineering involves complex systems with multiple variables influencing outcomes.
• Success relies on balancing tissue quantity and quality, presenting a significant challenge.
• The "windows of operation" tool, from bioprocessing, offers a graphical method to manage these trade-offs.

Purpose of the Study:

• To demonstrate the utility of the "windows of operation" tool in tissue engineering.
• To optimize perfusion-scaffold bioreactor systems for bone tissue engineering.
• To identify operating ranges that maximize osteogenic differentiation while minimizing cell detachment.

Main Methods:

• Utilized a perfusion-scaffold bioreactor system for bone tissue engineering.
• Investigated the impact of mean scaffold pore size and flow-rate on performance criteria.
• Employed "windows of operation" methodology with gene expression (cyclooxygenase-2, osteopontin) as osteogenesis indicators.

Main Results:

• Successfully identified feasible operating ranges for scaffold pore size and flow-rate.
• Demonstrated the ability to achieve user-defined performance levels for cell differentiation and detachment.
• The "windows of operation" tool facilitated rapid identification of optimal parameters.

Conclusions:

• The "windows of operation" tool is valuable for tissue engineering, particularly in bioreactor applications.
• This methodology aids in understanding complex systems and making informed decisions.
• Implementation of such tools can accelerate the translation of tissue engineering products.