Figure 4.
Demonstration of morphological changes in OP9 associated with a loss of hematopoiesis-inductive properties. (a) Spontaneous adipogenesis in overgrown OP9 cells. (b) After 8 days of hPSC/adipogenic OP9 coculture, the majority of hPSC colonies retain undifferentiated morphology. (c) Heterogeneous overgrown OP9 cultures with spindle cells forming long cords. (d) After 8 days of hPSC/heterogeneous OP9 coculture, the majority of hPSC colonies retain undifferentiated morphology. Scale bars=300µm.