How are bioartificial tissues made with cells and scaffolds?

In regenerative medicine, bioartificial tissues are created by seeding cells—typically autogeneic (self) cells to prevent immune system rejection—onto specialized scaffolds.1

These scaffolds provide a structural framework for cell growth and organization and generally fall into two categories:

• Natural Scaffolds: These consist of the extracellular matrix (ECM) derived from decellularized tissues or organs, which retain the original structural architecture.12
• Biomimetic Scaffolds: These are engineered using natural materials like collagen and proteoglycans, or artificial materials such as ceramics, metals, or polyester polymers.1

Advancements in tissue engineering, such as computer-aided design and nanofibre-based bioprinting, allow researchers to mimic complex microenvironments. Once seeded, these constructs may be incubated in a bioreactor, where mechanical stimulation or electrical pulses can encourage cells to mature, organize, and replicate the functions of natural tissues, such as muscle contraction or organ filtration.2