Induction of granulocytic differentiation by 2 pathways

Pu Zhang, Erik Nelson, Hanna S. Radomska, Junko Iwasaki-Arai, Koichi Akashi, Alan D. Friedman, Daniel G. Jenen

Research output: Contribution to journalArticlepeer-review

67 Citations (Scopus)


The CCAAT enhancer binding protein α (C/EBPα) transcription factor plays a critical role in granulocytopoiesis. Mice with a disruption of the C/EBPα gene demonstrate an early block in granulocytic differentiation, and disruption of C/EBPα function is a common theme in many types of human acute myelogenous leukemia, which is characterized by a block in myeloid development. To characterize further the nature of this block, we derived cell lines from the fetal liver of C/EBPα-deficient animals. These lines resembled morphologically the immature myeloid blasts observed in C/EBPα-/- fetal livers and did not express messenger RNA encoding early myeloid genes such as myeloperoxidase. Similarly, granulocytic markers such as Mac-1 and Gr-1 were not expressed; nor were erythroid and lymphoid surface antigens. Introduction of an inducible C/EBPα gene into the line revealed that conditional expression of C/EBPα induced the C/EBP family members C/EBPα and C/EBPε and subsequent granulocyte differentiation. Similar results were obtained when C/EBPα-/- cells were stimulated with the cytokines interleukin-3 and granulocyte-macrophage colony-stimulating factor, but not with all-trans retinoic acid, supporting a model of at least 2 pathways leading to the differentiation of myeloid progenitors to granulocytes and implicating induction of other C/EBP family members in granulopoiesis.

Original languageEnglish
Pages (from-to)4406-4412
Number of pages7
Issue number12
Publication statusPublished - Jun 15 2002
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology


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