How do decellularized organs serve as scaffolds for regenerative medicine?

In regenerative medicine, decellularized organs serve as natural scaffolds by providing the original extracellular matrix (ECM) of a donor organ, which retains the complex, three-dimensional architecture necessary for organ function.1

The process involves removing the original cells from a donor organ, leaving behind the structural framework—such as the cortical and medullary frameworks in a kidney or the vascular networks in a limb. This remaining ECM acts as a template that guides the organization and development of new cells.2

To create bioartificial tissues, researchers seed these scaffolds with specific precursor cells, such as muscle or vein cell precursors, and incubate them in a bioreactor. The scaffold provides the necessary microenvironment for these cells to mature, proliferate, and eventually replicate the organ's native functions, such as filtration or muscle contraction. By utilizing the natural architecture of the organ, scientists can address the technical challenges of engineering complex structures that consist of multiple tissue types working in coordination.23