Abstract
GLUT1 is a hypoxia-induced gene that has many biologically important functions, and the overexpression of the GLUT1 protein correlates with poor prognosis in several adult cancers. The clinical significance of the GLUT1 protein in peripheral neuroblastic tumours (NTs) has not been comprehensively documented. In the present retrospective study, immunohistochemical analyses revealed the presence of GLUT1 in 44/96 (46 %) NTs. Membranous GLUT1 was present in neuroblasts of 44/87 neuroblastomas (NBs) and nodular ganglioneuroblastomas (nGNBs) but was absent in ganglion cells. The presence of GLUT1 was significantly increased in NBs and nGNBs compared with maturing ganglioneuromas and intermixed ganglioneuroblastomas (P < 0.001). The proportion of NBs and nGNBs expressing GLUT1 was significantly increased in the high-risk and low/intermediate-risk groups compared with the very-low-risk group (P = 0.022) and the unfavourable compared with the favourable pathology prognostic group (P = 0.027). In the Cox regression analyses, GLUT1 expression indicated a worse overall survival (OS; hazard rate ratio (HR) 2.29, P = 0.053) and event-free survival (EFS; HR 1.68, P = 0.181) which was not attenuated by adjustment for the mitosis–karyorrhexis index and MYCN amplification (OS: adjusted HR 2.44, P = 0.053 and EFS: adjusted HR 1.63, P = 0.244). This indicated that GLUT1 protein expression was independent of mitosis–karyorrhexis index and MYCN amplification as a prognostic factor. Our data may have clinical significance because GLUT1 was also present in a higher proportion of high-risk NTs.
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Abbreviations
- GLUT1:
-
Glucose transporter protein 1
- GLUT1 :
-
Glucose transporter 1 gene
- SLC2A1 :
-
Solute carrier family 2A (facilitative glucose transporter) member 1
- HIF1A :
-
Hypoxia-inducible factor-1α gene
- HIF2A :
-
Hypoxia-inducible factor-2α gene
- HIF-1α:
-
Hypoxia-inducible factor-1α protein
- HIF-2α:
-
Hypoxia-inducible factor-2α protein
- NT:
-
Neuroblastic tumour
- NB:
-
Neuroblastoma
- GNB:
-
Ganglioneuroblastoma
- iGNB:
-
Intermixed ganglioneuroblastoma
- nGNB:
-
Nodular ganglioneuroblastoma
- GN:
-
Ganglioneuroma
- MKI:
-
Mitosis–karyorrhexis index
- INPC:
-
International Neuroblastoma Pathology Classification
- INRG:
-
International Neuroblastoma Risk Group
- INSS:
-
International Neuroblastoma Staging System
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Acknowledgments
The authors would like to thank Above and Beyond Charities of the University Hospitals Bristol Foundation Trust and Ince and Company for their financial support. The authors would like to thank Mike Luckett and Michelle Somerville for the technical support. The authors are grateful to the clinicians, radiologists and all the individuals who were involved in the management of the patients.
Conflict of interest
The authors declare that there is no conflict of interest. No part of the article has been published or submitted elsewhere, and there are no financial relationships that may lead to conflict of interest. The manuscript has been read and approved by all authors.
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Ramani, P., Headford, A. & May, M.T. GLUT1 protein expression correlates with unfavourable histologic category and high risk in patients with neuroblastic tumours. Virchows Arch 462, 203–209 (2013). https://doi.org/10.1007/s00428-012-1370-4
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DOI: https://doi.org/10.1007/s00428-012-1370-4