(A & B) Bar graph shows clonogenic/LSC potentials (mean ±SEM) of MLL-ENL AML cells transduced with lentiviruses containing shRNA constructs targeting Cbx5, Hmgb3 or Luciferase expression, by comparison with control cells transduced with an empty lentivirus (MTV). Transduced AML cells were FACS sorted for mCherry expression 48 hours following lentiviral infection. Colony types are indicated (A) and representative images are shown (B). Scale bar applies to all images.
(C) Graphs demonstrate that the extent of Cbx5 and Hmgb3 knockdown measured by quantitative PCR in transduced cells 48 hours following lentiviral transduction correlated with the inhibition of AML-CFC/LSC potential.
(D) Bar graph shows serial replating potentials of c-kit+ bone marrow stem and progenitor cells triple co-transduced with all possible combinations of Myb, Cbx5, Hmgb3 and control viruses. MNeo – MSCV Neo; MPuro – MSCV Puro; MIrG – MSCV IRES-GFP.
(E) Bar graph shows relative expression of Hoxa7, Hoxa9 and Meis1, as determined by quantitative PCR, in prospectively sorted normal murine bone marrow progenitor subsets (CMP, GMP and c-kit+ Mac1+ myeloblasts) and in c-kit+ bone marrow stem and progenitor cells immortalized by the indicated oncogenes, or co-expression of Myb, Cbx5 and Hmgb3 (HCM – 3 separate lines are shown).