Table 1.

Progenitor colony counts for methylcellulose assays

Colony typeBone marrow
EGMGMGEMMCells recovered
(× 106)
PU.1+/+Spi-B+/+ 1.6 ± 0.5 30.6 ± 6.4 37.4 ± 4.5  6.4 ± 1.3 19.9 ± 5.7  1.2 ± 0.6 
PU.1+/−Spi-B+/+ 5.4 ± 1.3 57.4 ± 16.3 56.0 ± 8.3 8.0 ± 3.0 10.0 ± 2.3 2.8 ± 1.3 
PU.1+/−Spi-B+/− 4.8 ± 1.5 56.3 ± 6.4 48 ± 5.0 6.5 ± 0.9 21.8 ± 3.6 1.3 ± 0.2 
PU.1+/+Spi-B−/− 2 ± 0.7 28.9 ± 5.4 50.4 ± 9.4 11.1 ± 3.7 14.4 ± 2.1 0.8 ± 0.1 
PU.1+/−Spi-B−/− 3.5 ± 2.0 38 ± 10.1 52.3 ± 7.8 3.3 ± 1.0 13.2 ± 4.0 0.4 ± 0.1 
Colony typeBone marrow
EGMGMGEMMCells recovered
(× 106)
PU.1+/+Spi-B+/+ 1.6 ± 0.5 30.6 ± 6.4 37.4 ± 4.5  6.4 ± 1.3 19.9 ± 5.7  1.2 ± 0.6 
PU.1+/−Spi-B+/+ 5.4 ± 1.3 57.4 ± 16.3 56.0 ± 8.3 8.0 ± 3.0 10.0 ± 2.3 2.8 ± 1.3 
PU.1+/−Spi-B+/− 4.8 ± 1.5 56.3 ± 6.4 48 ± 5.0 6.5 ± 0.9 21.8 ± 3.6 1.3 ± 0.2 
PU.1+/+Spi-B−/− 2 ± 0.7 28.9 ± 5.4 50.4 ± 9.4 11.1 ± 3.7 14.4 ± 2.1 0.8 ± 0.1 
PU.1+/−Spi-B−/− 3.5 ± 2.0 38 ± 10.1 52.3 ± 7.8 3.3 ± 1.0 13.2 ± 4.0 0.4 ± 0.1 
Colony typeSpleen
EGMGMGEMMCells recovered
(× 106)
PU.1+/+Spi-B+/+ 4.7 ± 0.6 35.3 ± 10.5 25.7 ± 5.9  2.7 ± 0.7 11.1 ± 3.3 2.6 ± 0.9 
PU.1+/−Spi-B+/+ 2.8 ± 0.8 24.3 ± 8.1 42.5 ± 18.6 4.3 ± 2.1 23.8 ± 13.2 2.7 ± 0.5 
PU.1+/−Spi-B+/− 2.5 ± 0.6 37.8 ± 16.1 44.0 ± 12.8 6.5 ± 1.7 41.3 ± 7.9 2.1 ± 0.3 
PU.1+/+Spi-B−/− 3.0 ± 1.2 22.5 ± 6.8 20.3 ± 7.5 3.8 ± 0.5 7.7 ± 2.6 2.6 ± 0.9 
PU.1+/−Spi-B−/− 4.0 ± 0.6 45.8 ± 18.3 56.6 ± 11.6 6.0 ± 3.0 38.8 ± 9.6 2.1 ± 1.1 
Colony typeSpleen
EGMGMGEMMCells recovered
(× 106)
PU.1+/+Spi-B+/+ 4.7 ± 0.6 35.3 ± 10.5 25.7 ± 5.9  2.7 ± 0.7 11.1 ± 3.3 2.6 ± 0.9 
PU.1+/−Spi-B+/+ 2.8 ± 0.8 24.3 ± 8.1 42.5 ± 18.6 4.3 ± 2.1 23.8 ± 13.2 2.7 ± 0.5 
PU.1+/−Spi-B+/− 2.5 ± 0.6 37.8 ± 16.1 44.0 ± 12.8 6.5 ± 1.7 41.3 ± 7.9 2.1 ± 0.3 
PU.1+/+Spi-B−/− 3.0 ± 1.2 22.5 ± 6.8 20.3 ± 7.5 3.8 ± 0.5 7.7 ± 2.6 2.6 ± 0.9 
PU.1+/−Spi-B−/− 4.0 ± 0.6 45.8 ± 18.3 56.6 ± 11.6 6.0 ± 3.0 38.8 ± 9.6 2.1 ± 1.1 

All values are expressed as mean ± SE.

E indicates erythroid colonies; G, granulocyte colonies; M, monocyte colonies; GM, mixed granulocyte and monocyte colonies; GEMM, multilineage colonies containing myeloid and erythroid cells.

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