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Erschienen in: European Archives of Oto-Rhino-Laryngology 2/2016

01.02.2016 | Head and Neck

Glutaminolysis and carcinogenesis of oral squamous cell carcinoma

verfasst von: Marcel Cetindis, Thorsten Biegner, Adelheid Munz, Peter Teriete, Siegmar Reinert, Martin Grimm

Erschienen in: European Archives of Oto-Rhino-Laryngology | Ausgabe 2/2016

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Abstract

Glutaminolysis is a crucial factor for tumor metabolism in the carcinogenesis of several tumors but has not been clarified for oral squamous cell carcinoma (OSCC) yet. Expression of glutaminolysis-related solute carrier family 1, member 5 (SLC1A5)/neutral amino acid transporter (ASCT2), glutaminase (GLS), and glutamate dehydrogenase (GLDH) was analyzed in normal oral mucosa (n = 5), oral precursor lesions (simple hyperplasia, n = 11; squamous intraepithelial neoplasia, SIN I–III, n = 35), and OSCC specimen (n = 42) by immunohistochemistry. SLC1A5/ASCT2 and GLS were significantly overexpressed in the carcinogenesis of OSCC compared with normal tissue, while GLDH was weakly detected. Compared with SIN I–III SLC1A5/ASCT2 and GLS expression were significantly increased in OSCC. GLDH expression did not significantly differ from SIN I–III compared with OSCC. This study shows the first evidence of glutaminolysis-related SLC1A5/ASCT2, GLS, and GLDH expression in OSCC. The very weak GLDH expression indicates that glutamine metabolism is rather related to nucleotide or protein/hexosamine biosynthesis or to the function as an antioxidant (glutathione) than to energy production or generation of lactate through entering the tricarboxylic acid cycle. Overcoming glutaminolysis by targeting c-Myc oncogene (e.g. by natural compounds) and thereby cross-activation of mammalian target of rapamycin complex 1 or SLC1A5/ASCT2, GLS inhibitors may be a useful strategy to sensitize cancer cells to common OSCC cancer therapies.
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Metadaten
Titel
Glutaminolysis and carcinogenesis of oral squamous cell carcinoma
verfasst von
Marcel Cetindis
Thorsten Biegner
Adelheid Munz
Peter Teriete
Siegmar Reinert
Martin Grimm
Publikationsdatum
01.02.2016
Verlag
Springer Berlin Heidelberg
Erschienen in
European Archives of Oto-Rhino-Laryngology / Ausgabe 2/2016
Print ISSN: 0937-4477
Elektronische ISSN: 1434-4726
DOI
https://doi.org/10.1007/s00405-015-3543-7

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