Estrogen-Related Receptor Alpha Modulates Lactate Dehydrogenase Activity in Thyroid Tumors. e58683

Metabolic modifications of tumor cells are hallmarks of cancer. They exhibit an altered metabolism that allows them to sustain higher proliferation rates in hostile environment outside the cell. In thyroid tumors, the expression of the estrogen-related receptor alpha (ERR alpha ), a major factor of...

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Veröffentlicht in:PloS one 2013-03, Vol.8 (3)
Hauptverfasser: Mirebeau-Prunier, Delphine, Pennec, Soazig Le, Jacques, Caroline, Fontaine, Jean-Fred, Gueguen, Naig, Boutet-Bouzamondo, Nathalie, Donnart, Audrey, Malthiery, Yves, Savagner, Frederique
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container_title PloS one
container_volume 8
creator Mirebeau-Prunier, Delphine
Pennec, Soazig Le
Jacques, Caroline
Fontaine, Jean-Fred
Gueguen, Naig
Boutet-Bouzamondo, Nathalie
Donnart, Audrey
Malthiery, Yves
Savagner, Frederique
description Metabolic modifications of tumor cells are hallmarks of cancer. They exhibit an altered metabolism that allows them to sustain higher proliferation rates in hostile environment outside the cell. In thyroid tumors, the expression of the estrogen-related receptor alpha (ERR alpha ), a major factor of metabolic adaptation, is closely related to the oxidative metabolism and the proliferative status of the cells. To elucidate the role played by ERR alpha in the glycolytic adaptation of tumor cells, we focused on the regulation of lactate dehydrogenases A and B (LDHA, LDHB) and the LDHA/LDHB ratio. Our study included tissue samples from 10 classical and 10 oncocytic variants of follicular thyroid tumors and 10 normal thyroid tissues, as well as samples from three human thyroid tumor cell lines: FTC-133, XTC.UC1 and RO82W-1. We identified multiple cis-acting promoter elements for ERR alpha , in both the LDHA and LDHB genes. The interaction between ERR alpha and LDH promoters was confirmed by chromatin immunoprecipitation assays and in vitro analysis for LDHB. Using knock-in and knock-out cellular models, we found an inverse correlation between ERR alpha expression and LDH activity. This suggests that thyroid tumor cells may reprogram their metabolic pathways through the up-regulation of ERR alpha by a process distinct from that proposed by the recently revisited Warburg hypothesis.
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title Estrogen-Related Receptor Alpha Modulates Lactate Dehydrogenase Activity in Thyroid Tumors. e58683
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