Abstract:
:PU.1 is a versatile hematopoietic cell-specific ETS-family transcriptional regulator required for the development of both the inborn and the adaptive immunity, owing to its potential ability to regulate the expression of multiple genes specific for different lineages during normal hematopoiesis. It functions in a cell-autonomous manner to control the proliferation and differentiation, predominantly of lymphomyeloid progenitors, by binding to the promoters of many myeloid genes including the macrophage colony-stimulating factor (M-CSF) receptor, granulocyte-macrophage (GM)-CSF receptor alpha, and CD11b. In B cells, it regulates the immunoglobulin lambda 2-4 and kappa 3' enhancers, and J chain promoters. Besides lineage development, PU.1 also directs homing and long-term engraftment of hematopoietic progenitors to the bone marrow. PU.1 gene disruption causes a cell-intrinsic defect in hematopoietic progenitor cells, recognized by an aberrant myeloid and B lymphoid development. It also immortalizes erythroblasts when overexpressed in many cell lines. Although a number of reviews have been published on its functional significance, in the following review we attempted to consolidate information about the differential participation and role of transcription factor PU.1 at various stages of hematopoietic development beginning from stem cell proliferation, lineage commitment and terminal differentiation into distinct blood cell types, and leukemogenesis.
journal_name
Stem Cells Devjournal_title
Stem cells and developmentauthors
Gangenahalli GU,Gupta P,Saluja D,Verma YK,Kishore V,Chandra R,Sharma RK,Ravindranath Tdoi
10.1089/scd.2005.14.140keywords:
subject
Has Abstractpub_date
2005-04-01 00:00:00pages
140-52issue
2eissn
1547-3287issn
1557-8534journal_volume
14pub_type
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