How does regenerative medicine repair tissues damaged by injury or disease?

Regenerative medicine repairs tissues damaged by injury or disease through several innovative approaches aimed at restoring structure and function. These methods generally fall into three categories:12

• Biochemical Stimulation: Scientists use soluble factors—such as proteins and small molecules—to induce repair by resident cells at the injury site. These agents protect existing cells and stimulate them to migrate, proliferate, and form new tissue.3
• Cell Transplantation: This involves the use of differentiated cells or stem cells to replace damaged tissue. To minimize the risk of immune rejection, these cells are typically autogeneic (derived from the patient).12
• Tissue Engineering: This approach integrates cells with scaffolds—natural or biomimetic structures that provide a framework for cell growth. Cells are seeded onto these scaffolds and incubated in environments that mimic natural conditions, allowing them to organize into functional bioartificial tissues or organs before being transplanted.134

By combining these techniques, researchers aim to treat complex conditions, ranging from skin wounds and burns to the regeneration of organs like the kidney or the development of bioartificial limbs.34