Figure 4.
Enforced expression of huFlt3 permits myelomonocytic development from huFlt3+-MEPs but not megakaryocyte/erythrocyte development from huFlt3+-GMPs. (A) Bar graph shows myeloid colony–forming activity in normal and retrovirus-transduced myeloid progenitors (MEPs, GMPs, and CMPs). CFU-GEMM, CFU-granulocyte/erythroid/macrophage/megakaryocyte; CFU-MegE, CFU-megakaryocyte/erythroid; CFU-Meg, CFU-megakaryocyte; BFU-E, burst-forming units/erythroid; CFU-GM, CFU-granulocyte/macrophage; CFU-M, CFU-macrophage; CFU-G, CFU-granulocyte. Results are from one representative experiment out of three. 200 GFP+ cells were plated each. (B) Enforced expression of huFlt3 in MEPs is sufficient to rescue IPC, DC, and myelomonocytic cell development in vivo. Contour plots show GFP expression in day 7 spleen progeny of GFP +-MEPs, huFlt3 +-MEPs, and GFP +-CMPs. Numbers at gates represent percentages of total plotted cells. Results are from one representative experiment out of four.