cells (preMDS/AML-SC) and malignant stem cells (MDS/AML-SCs), cells were
FACS-sorted from additional patients with the same strategy (
in HSC003 methylcellulose medium according to the manufacturer’s
recommendation (R&D Systems, Minneapolis, MN). Colonies of different
hematopoietic lineages were scored two weeks after plating using an Inverted
Infinity and Phase Contrast Microscope (Fisher Scientific, Hampton, NH). In
addition, to examine the expression of lineage makers, methylcellulose medium
was dissolved in PBS to dissociate the colonies into single cell suspension.
Cells were stained with antibodies against CD14, CD15 and CD235a on ice for 30
minutes, then analyzed on a BD FACSAria II system.