Abundant expression of erythroid transcription factor P45 NF-E2 mRNA in human peripheral granurocyte

Tsutomu Toki, Jugo Itoh, Koji Arai, Jyun Ichi Kitazawa, Masaru Yokoyama, Kazuhiko Igarashi, Masayuki Yamamoto, Etsuro Ito

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Transcription factor NF-E2 is crucial for regulation of erythroid-specific gene expression. p45 subunit of NF-E2 contains a basic-leucine zipper domain and dimerizes with the small Maf family protein to form functional NF-E2 complex. While p45 expression was shown to be restricted to erythroid cells, megakaryocytes and mast cells in hematopoietic lineage, we found in this study that p45 mRNA is abundantly transcribed in the granulocyte fraction of human peripheral blood cells. As neutrophils occupy approximately 92% of the cells in this fraction, the cells expressing p45 is most likely to be neutrophils. p45 mRNA is also expressed in HL-60 promyelocytes, albeit the expression level is much lower than that of the granulocyte fraction. HL-60 cells were found to express mafK mRNA, indicating the presence of genuine NF-E2 complex in the cells. Although p45 mRNA is transcribed from two different promoters, aNF-E2 promoter and aNF-E2 promoter, in erythroid and megakaryocytic lineage cells, p45 mRNA is transcribed only from aNF-E2 promoter. The expression of p45 mRNA in the neutrophils declined rapidly after transfer of the cells to in vitro culture and G-CSF could not sustain the expression from the down-regulation, suggesting the E2 may also participate in the regulation of neutrophil-specific gene expression.

Original languageEnglish
Pages (from-to)760-765
Number of pages6
JournalBiochemical and biophysical research communications
Volume219
Issue number3
DOIs
Publication statusPublished - 1996 Feb 27

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Molecular Biology
  • Cell Biology

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