Video 2.

HSPC anchorage to osteoblasts in a microwell. Video shows transmitted light (phase contrast) of two HSPCs on top of two osteoblasts in a microwell (50 µm wide). Note the dynamic shape changes of HSPCs but their long-lasting anchorage on the dorsal surface of osteoblasts via a thin protrusion. Scale bar represents 20 µm. Time is indicated in hours:minutes.

Hematopoietic progenitors polarize in contact with bone marrow stromal cells in response to SDF1

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DOI: 10.1083/jcb.202005085