Tunable methacrylated decellularized heart matrix: a versatile scaffold for cardiac tissue engineering.

Area of Science:

• Biomaterials Science
• Regenerative Medicine
• Cardiovascular Research

Background:

• Therapeutic tissue regeneration is crucial for treating heart failure and cardiovascular diseases, major global health concerns.
• Decellularized heart matrix (DHM) shows potential for tissue engineering due to low immunogenicity and good biocompatibility.
• A key limitation of DHM is its insufficient mechanical strength for biomedical applications.

Purpose of the Study:

• To enhance the mechanical properties of decellularized heart matrix (DHM) for cardiac tissue engineering.
• To develop a method for tuning the stiffness of DHM scaffolds.
• To assess the suitability of the modified DHM for cell survival and microfabrication.

Main Methods:

• Decellularized heart matrix (DHM) was functionalized with methacryloyl groups to create DHMMA.
• UV-induced crosslinking was employed to enhance mechanical properties and tune stiffness.
• Soft lithography was used to impart topographical features onto the DHMMA scaffolds.

Main Results:

• Methacryloyl functionalization (DHMMA) significantly improved the mechanical properties of DHM.
• Tunable stiffness was achieved by modulating the degree of methacryloyl substitution, UV exposure, and pH.
• Crosslinked DHMMA maintained cell viability and supported cell orientation via topographical features.

Conclusions:

• DHMMA presents a promising scaffold for cardiac tissue engineering with tunable mechanical properties.
• The modified matrix supports cell survival and allows for microfabrication, addressing limitations of native DHM.
• This approach offers a viable strategy for developing advanced biomaterials for cardiovascular regenerative medicine.