9:15 AM. 369. Compressive Loading of Alginate Microgel-Spheroid Composite Scaffolds Induces Hypertrophic Chondrocyte Phenotype in Stem Cell Spheroids.David Ramos-Rodriguez1, Andrea Filler1, Sheetal Palle2, Shierly Fok1, Erika Wheeler1, Mason Caserta1, Connor Dorais1, J. Kent Leach1 1UC Davis Health, 2UC Davis