Microscale materials (green) entrapped within aggregates of stem cells.

Stem cell morphogen delivery via engineered biomaterials

Small, round particles, on the order of 10 microns, can be mixed with stem cells of the same approximate size to form aggregates of the cells and materials. As stem cells secrete growth factors, the entrapped particles can capture the secreted molecules. The aggregates can then be disrupted in order to retrieve the particles, now loaded with the stem cell-derived factors. The stem cell factor-laden particles can then be injected at different sites of disease or injury in adult mammals in order to promote tissue repair and regeneration.