How are tissue scaffolds used to help damaged tissues repair themselves?

In regenerative medicine, tissue scaffolds serve as essential structural frameworks that facilitate the repair and replacement of damaged tissues. They function in two primary ways:12

• Direct Stimulation: Scaffolds can be placed at an injury site to protect resident fibroblasts and adult stem cells, stimulating them to migrate into the damaged area and proliferate to form new tissue.1
• Bioartificial Tissue Engineering: Scientists seed cells onto natural or biomimetic scaffolds to create functional tissue substitutes in a laboratory. Natural scaffolds are often derived from the extracellular matrix (ECM) of decellularized organs, while biomimetic scaffolds may be constructed from synthetic materials like polymers, metals, or ceramics.23

Once seeded, these constructs are often incubated in mediums containing growth factors that encourage cells to grow and organize. After the substitute tissue is implanted into the body, the scaffold is typically designed to be absorbed or dissolved, leaving behind only the newly regenerated biological tissue. This technology is currently used to treat conditions such as burns, hernias, and cartilage damage.31