Koch, Andreas and Lang, Sven Arke and Wild, Peter Johannes and Gantner, Susanne and Mahli, Abdo and Spanier, Gerrit and Berneburg, Mark and Mueller, Martina and Bosserhoff, Anja Katrin and Hellerbrand, Claus (2015) Glucose transporter isoform 1 expression enhances metastasis of malignant melanoma cells. ONCOTARGET, 6 (32). pp. 32748-32760. ISSN 1949-2553,
Full text not available from this repository. (Request a copy)Abstract
The glucose transporter isoform 1 (GLUT1; SLC2A1) is a key rate-limiting factor in the transport of glucose into cancer cells. Enhanced GLUT1 expression and accelerated glycolysis have been found to promote aggressive growth in a range of tumor entities. However, it was unknown whether GLUT1 directly impacts metastasis. Here, we aimed at analyzing the expression and function of GLUT1 in malignant melanoma. Immunohistochemical analysis of 78 primary human melanomas on a tissue micro array showed that GLUT1 expression significantly correlated with the mitotic activity and a poor survival. To determine the functional role of GLUT1 in melanoma, we stably suppressed GLUT1 in the murine melanoma cell line B16 with shRNA. GLUT1 suppressed melanoma cells revealed significantly reduced proliferation, apoptosis resistance, migratory activity and matrix metalloproteinase 2 (MMP2) expression. In a syngeneic murine model of hepatic metastasis, GLUT1-suppressed cells formed significantly less metastases and showed increased apoptosis compared to metastases formed by control cells. Treatment of four different human melanoma cell lines with a pharmacological GLUT1 inhibitor caused a dose-dependent reduction of proliferation, apoptosis resistance, migratory activity and MMP2 expression. Analysis of MAPK signal pathways showed that GLUT1 inhibition significantly decreased JNK activation, which regulates a wide range of targets in the metastatic cascade. In summary, our study provides functional evidence that enhanced GLUT1 expression in melanoma cells favors their metastatic behavior. These findings specify GLUT1 as an attractive therapeutic target and prognostic marker for this highly aggressive tumor.
Item Type: | Article |
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Uncontrolled Keywords: | HEPATIC STELLATE CELLS; HEPATOCELLULAR-CARCINOMA; GLUT1 EXPRESSION; CANCER CELLS; FDG UPTAKE; RESISTANCE; INHIBITOR; OVEREXPRESSION; METABOLISM; PROGNOSIS; GLUT1; melanoma; metastasis; glycolysis; JNK |
Subjects: | 600 Technology > 610 Medical sciences Medicine |
Divisions: | Medicine > Lehrstuhl für Innere Medizin I |
Depositing User: | Dr. Gernot Deinzer |
Date Deposited: | 13 May 2019 11:58 |
Last Modified: | 13 May 2019 11:58 |
URI: | https://pred.uni-regensburg.de/id/eprint/4606 |
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