Mechanically and biologically promoted cell-laden constructs generated using tissue-specific bioinks for...

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Tissue Engineering

Background:

• Tendon and ligament (T/L) injuries are common and difficult to treat due to poor natural healing.
• Current treatments for T/L injuries lack effective regeneration strategies.
• Bioengineering biomimetic implants are crucial for T/L injury repair.

Purpose of the Study:

• To develop a cell-based tissue engineering strategy for T/L regeneration.
• To create cell-laden T/L constructs using 3D cell-printing technology.
• To evaluate the efficacy of in vitro preconditioning on T/L construct development and in vivo performance.

Main Methods:

• Utilized 3D cell-printing to create cell-laden constructs with stem cells and tissue-specific bioinks.
• Implemented an in vitro preconditioning approach using decellularized extracellular matrix (dECM).
• Assessed construct maturation, cell viability, tenogenesis, and in vivo tendon formation in nude mice.

Main Results:

• In vitro maturation in dECM-based constructs enhanced cell viability and tenogenesis.
• Pre-matured constructs showed improved cell survival and de novo tendon formation in vivo.
• Engineered constructs exhibited enhanced cellular and structural anisotropy post-maturation.

Conclusions:

• 3D cell-printed, pre-matured T/L constructs show promise for tendon and ligament regeneration.
• This strategy offers potential for improved cell-based therapies and translational medicine in T/L repair.
• Further research is needed to enhance in vivo mechanical properties for clinical application.