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Updated: Feb 8, 2026

In Vitro Generation of Murine Plasmacytoid Dendritic Cells from Common Lymphoid Progenitors using the AC-6 Feeder System
Published on: November 23, 2015
PU.1 Is Required for the Developmental Progression of Multipotent Progenitors to Common Lymphoid Progenitors
Swee Heng Milon Pang1,2, Carolyn A de Graaf1,2, Douglas J Hilton1,2
1The Walter and Eliza Hall Institute of Medical Research, Parkville, VIC, Australia.
Abstract:
The transcription factor PU.1 is required for the development of mature myeloid and lymphoid cells. Due to this essential role and the importance of PU.1 in regulating several signature markers of lymphoid progenitors, its precise function in early lymphopoiesis has been difficult to define. Here, we demonstrate that PU.1 was required for efficient generation of lymphoid-primed multipotent progenitors (LMPPs) from hematopoietic stem cells and was essential for the subsequent formation of common lymphoid progenitors (CLPs). By contrast, further differentiation into the B-cell lineage was independent of PU.1. Examination of the transcriptional changes in conditional progenitors revealed that PU.1 activates lymphoid genes in LMPPs, while repressing genes normally expressed in neutrophils. These data identify PU.1 as a critical regulator of lymphoid priming and the transition between LMPPs and CLPs.
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