Oncotarget

Research Papers:

High glucose uptake unexpectedly is accompanied by high levels of the mitochondrial β-F1-ATPase subunit in head and neck squamous cell carcinoma

Christian U. Huebbers _, Alexander C. Adam, Simon F. Preuss, Theresa Schiffer, Sarah Schilder, Orlando Guntinas-Lichius, Matthias Schmidt, Jens P. Klussmann and Rudolf J. Wiesner

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Oncotarget. 2015; 6:36172-36184. https://doi.org/10.18632/oncotarget.5459

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Abstract

Christian U. Huebbers1,*, Alexander C. Adam2,*, Simon F. Preuss3, Theresa Schiffer4, Sarah Schilder4, Orlando Guntinas-Lichius5, Matthias Schmidt6, Jens P. Klussmann7, Rudolf J. Wiesner4,8,9

1Jean-Uhrmacher-Institute for Otorhinolaryngological Research, University of Köln, 50924 Köln, Germany

2Department of Pathology, Medical Faculty, University of Köln, 50924 Köln, Germany

3Department of Otolaryngology, Medical Faculty, University of Köln, 50924 Köln, Germany

4Center for Physiology and Pathophysiology, Institute of Vegetative Physiology, Medical Faculty, University of Köln, 50931 Köln, Germany

5Department of Otorhinolaryngology, Jena University Hospital, 07740 Jena, Germany

6Department of Nuclear Medicine, Medical Faculty, University of Köln, 50924 Köln, Germany

7Department of Otorhinolaryngology, Head and Neck Surgery, University of Giessen, 35385 Giessen, Germany

8Center for Molecular Medicine Cologne, CMMC, University of Köln, 50931 Köln, Germany

9Cologne Excellence Cluster on Cellular Stress Responses in Ageing-associated Diseases (CECAD), 50674 Köln, Germany

*These authors have contributed equally to this work

Correspondence to:

Rudolf J. Wiesner, e-mail: rudolf.wiesner@uni-koeln.de

Keywords: HNSCC, OXPHOS, 18F-FDG-PET, Warburg effect

Received: March 09, 2015     Accepted: September 24, 2015     Published: October 06, 2015

ABSTRACT

A hallmark of solid tumors is the consumption of large amounts of glucose and production of lactate, also known as Warburg-like metabolism. This metabolic phenotype is typical for aggressive tumor growth, and can be visualized by 18F-fluorodeoxyglucose (18F-FDG) uptake detected by positron emission tomography (PET). High 18F-FDG uptake inversely correlates with survival and goes along with reduced expression of the catalytic beta-subunit of the H+-ATP synthase (β-F1-ATPase) in several tumor entities analyzed so far.

For this study we characterized a series of 15 head and neck squamous cell carcinoma (HNSCC) by (i) determining 18F-FDG-uptake; (ii) quantitative expression analysis of β-F1-ATPase (Complex V), NDUF-S1 (Complex I) and COX1 (Complex IV) of the mitochondrial electron transport chain (ETC), as well as Hsp60 (mitochondrial mass) and GAPDH (glycolysis) in tumor cells; (iii) sequencing of the mtDNA of representative tumor samples.

Whereas high 18F-FDG-uptake also correlates with poor prognosis in HNSCC, it surprisingly is accompanied by high levels of β-F1-ATPase, but not by any of the other analyzed proteins.

In conclusion, we here describe a completely new phenotype of metabolic adaptation possibly enabling those tumors with highest levels of β-F1-ATPase to rapidly proliferate even in hypoxic zones, which are typical for HNSCC.


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