Abstract
The bifunctional enzyme 6-phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFK-2/FBPase-2) controls the glycolytic flux via the allosteric activator fructose 2,6-bisphosphate. Because of its proto-oncogenic character, the PFK-2/FBPase-2 of the PFKFB3 gene is assumed to play a critical role in tumorigenesis. We investigated the PFKFB3 expression in 40 human astrocytic gliomas and 20 non-neoplastic brain tissue specimens. The PFKFB3 protein levels were markedly elevated in high-grade astrocytomas relative to low-grade astrocytomas and corresponding non-neoplastic brain tissue, whereas no significant increase of PFKFB3 mRNA was observed in high-grade astrocytomas when compared with control tissue. In the group of glioblastomas the PFKFB3 protein inversely correlates with EGFR expression. The findings demonstrate that PFKFB3 up-regulation is a hallmark of high-grade astrocytomas offering an explanation for high glycolytic flux and lactate production in these tumors.
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This work was supported by the Wilhelm-Sander-Stiftung (2004.010.1).
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Kessler, R., Bleichert, F., Warnke, JP. et al. 6-Phosphofructo-2-kinase/fructose-2,6-bisphosphatase (PFKFB3) is up-regulated in high-grade astrocytomas. J Neurooncol 86, 257–264 (2008). https://doi.org/10.1007/s11060-007-9471-7
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DOI: https://doi.org/10.1007/s11060-007-9471-7