Levels of inositol metabolites within normal myeloid blast cells and changes during their differentiation towards monocytes

C. M. Bunce*, P. J. French, W. N. Patton, A. S. Turnell, S. A. Scott, R. H. Michell, C. J. Kirk, G. Brown

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)


A homogeneous population of undifferentiated myeloid blast cells was purified from human fetal liver by rosette sedimentation of erythroblasts and macrophages after coating these cells with monoclonal antibodies, followed by a cell elutriation step. The undifferentiated blast cells were maintained in culture in a serum-free medium containing 1 mg l-1 inositol, by the presence of a high concentration of interleukin-3 (100 U ml-1). This allowed equilibrium labelling of cells with [2-3H]myo-inositol and analysis of the concentrations of inositol metabolites. The myeloid blast cells contained high concentrations of an unidentified inositol metabolite possibly sn-glycero-3-phospho-1-inositol (GroPIns, 22 μM), inositol monophosphate (InsP, 16 μM), an unidentified inositol bisphosphate (InsP2, 9.4 μM), inositol pentakisphosphate (InsP5, 37 μM) and inositol hexakisphosphate (InsP6, 31 μM). These high concentrations are similar to those reported in the promyeloid cell line, HL60. Treatment of the blast cells with 10 nM phorbol myristate acetate (PMA) resulted in rapid differentiation of 48% of the cells towards monocytes. Notable changes in the levels of inositol metabolites included an increase in the putative GroPIns peak (to 73 μM) and decreases in the concentrations of InsP4 (from 4 μM to 1 μM) and InsP5 (to 21 μM). These changes in response to PMA, with the exception of the rise in the putative GroPIns are similar to those reported in HL60 cells undergoing monocyte differentiation. These observations suggest that the abundant inositol polyphosphates may have an as yet unknown role in myeloid differentiation.

Original languageEnglish
Pages (from-to)27-33
Number of pages7
JournalProceedings of the Royal Society B: Biological Sciences
Issue number1318
Publication statusPublished - 1 Jan 1992

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Immunology and Microbiology(all)
  • Environmental Science(all)
  • Agricultural and Biological Sciences(all)


Dive into the research topics of 'Levels of inositol metabolites within normal myeloid blast cells and changes during their differentiation towards monocytes'. Together they form a unique fingerprint.

Cite this