Rapid Heterotrophic Ossification with Cryopreserved Poly(ethylene glycol-) Microencapsulated BMP2-Expressing MSCs

Figure 4

Structural analysis of freshly prepared and cryopreserved encapsulated MSCs: (a) phase contrast of microencapsulated ovine A MSCs showed clear borders on microbeads. (b) SEM of MSC microbeads showed a uniform surface. (c) SEM of MSC microbeads of all sizes showed uniform structure. (d) Phase contrast of cryopreserved microencapsulated MSCs did not show appreciable damage. (e) SEM of cryopreserved MSC microbeads showed a uniform surface. (f) SEM of cryopreserved microencapsulated MSCs showed no damage to beads of various sizes.