Modelling the effects of inhibitors of guanine nucleotide synthesis: implications for studies of cellular differentiation pathways

Author:

Thomas Geraint M.H.1

Affiliation:

1. Department of Cell and Developmental Biology, University College London, Gower Street, London WC1E 6BT, U.K., Department of Structural & Molecular Biology, University College London, Gower Street, London, WC1E 6BT, U.K., and CoMPLEX, University College London, Gower Street, London WC1E 6BT, U.K.

Abstract

Mizoribine induces the differentiation of promyelocytes by an unknown mechanism that relies on compromised guanine nucleotide synthesis. I have found that mizoribine also perturbs adenosine nucleotide levels in HL-60 promyelocytes, particularly ATP. To reconcile these observations with the known actions of mizoribine I have adapted an existing model of human purine metabolism composed as an S-system familiar from Biochemical Systems Theory. Mizoribine's actions were then simulated and compared with experimental data.

Publisher

Portland Press Ltd.

Subject

Biochemistry

Reference14 articles.

1. Mizoribine and mycophenolate mofetil;Ishikawa;Curr. Med. Chem.,1999

2. Differentiation and reduction of intracellular GTP levels in HL-60 and U937 cells upon treatment with IMP dehydrogenase inhibitors;Inai;Adv. Exp. Med. Biol.,1998

3. Differentiation induction in non-lymphocytic leukemia cells upon treatment with mizoribine;Inai;Int. J. Hematol.,1997

4. A decrease in the intracellular guanosine 5'-triphosphate concentration is necessary for granulocytic differentiation of HL-60 cells, but growth cessation and differentiation are not associated with a change in the activation state of Ras, the transforming principle of HL-60 cells;Pilz;Cell Growth Differ.,1997

5. Cell fates as high-dimensional attractor states of a complex gene regulatory network;Huang;Phys. Rev. Lett.,2005

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