Fig. 3

Formation and culture of tumor hybrid cells after spontaneous cell fusion. a Co-culture of MSC^GFP with MDA-MB-231^cherry breast cancer cells demonstrating the development of fusion cells which are indicated by white arrows. Scale bars represent 200 μM. b Mono-culture of isolated and expanded MDA-hybrid2 cells exhibiting dual fluorescence from both maternal cell populations (MSC^GFP and MDA-MB-231^cherry). Scale bars represent 100 μM