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Reduction in ETFDH expression optimizes cancer cell bioenergetics

Papadopoli, D.; Palia, R.; Jovanovic, P.; Tabaries, S.; Ciccolini, E.; Sabourin, V.; Igelmann, S.; McLaughlan, S.; Zhan, L.; Kim, H.; Chekkal, N.; Szkop, K. J.; Bertomeu, T.; Zeng, J.; Vassalakis, J.; Afzali, F.; Mzoughi, S.; Guccione, E.; Tyers, M.; Avizonis, D.; Larsson, O.; Postovit, L.-M.; Djuranovic, S.; Ursini-Siegel, J.; Siegel, P. M.; Pollak, M.; Topisirovic, I.

2024-10-25 cancer biology
10.1101/2024.10.25.620155 bioRxiv
Show abstract

Mitochondrial electron transport flavoprotein (ETF) insufficiency causes metabolic diseases known as a multiple acyl-CoA dehydrogenase deficiency (MADD). In contrast to muscle, ETFDH is a non-essential gene in acute lymphoblastic leukemia NALM-6 cells, and its expression is reduced across human cancers. ETF insufficiency caused by decreased ETFDH expression limits flexibility of OXPHOS fuel utilization but paradoxically increases cancer cell bioenergetics and accelerates neoplastic growth by activation of the mTORC1/BCL-6/4E-BP1 axis. Collectively, these findings reveal that while ETF insufficiency is rare and has detrimental effects in non-malignant tissues, it is common in neoplasia, where ETFDH downregulation leads to bioenergetic and signaling reprogramming that accelerate neoplastic growth.

Published in eLife (predicted rank #2) · training set

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