Fig. 3.

Cell viability of the AML blast population and CXCR4 expression remained unaffected when no direct contact with stroma cells was allowed. Primary patient AML samples were co-cultured with HS-5 cells in a transwell system and treated with G-CSF at increasing concentrations for 24 h. a Cell viability and b CXCR4 surface expression were measured by flow cytometry