Research Article

Synergistic Integration of Mesenchymal Stem Cells and Hydrostatic Pressure in the Expansion and Maintenance of Human Hematopoietic/Progenitor Cells

Figure 2

Scanning electron micrograph (SEM) images of hematopoietic stem/progenitor cells (HSPCs; white arrows) cultured directly over mesenchymal stem cell (MSC) feeder layers (black arrows). Day 4 cocultures are presented using different magnifications (×100, ×200, and ×5000) showing well-established cell-cell interactions between HSPCs and MSCs.