Loss of USF2 promotes proliferation, migration and mitophagy in a redox-dependent manner

The upstream stimulatory factor 2 (USF2) is a transcription factor implicated in several cellular processes and among them, tumor development seems to stand out. However, the data with respect to the role of USF2 in tumor development are conflicting suggesting that it acts either as tumor promoter o...

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Bibliographic Details
Published in:Redox biology 2020-10, Vol.37, p.101750-101750, Article 101750
Main Authors: Chi, Tabughang Franklin, Khoder-Agha, Fawzi, Mennerich, Daniela, Kellokumpu, Sakari, Miinalainen, IIkka, Kietzmann, Thomas, Dimova, Elitsa Y.
Format: Article
Language:English
Subjects:
Compromised mitochondria
Migration
Mitophagy
Proliferation
Research Paper
Upstream stimulatory factor 2 (USF2)
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Summary:The upstream stimulatory factor 2 (USF2) is a transcription factor implicated in several cellular processes and among them, tumor development seems to stand out. However, the data with respect to the role of USF2 in tumor development are conflicting suggesting that it acts either as tumor promoter or suppressor. Here we show that absence of USF2 promotes proliferation and migration. Thereby, we reveal a previously unknown function of USF2 in mitochondrial homeostasis. Mechanistically, we demonstrate that deficiency of USF2 promotes survival by inducing mitophagy in a ROS-sensitive manner by activating both ERK1/2 and AKT. Altogether, this study supports USF2′s function as tumor suppressor and highlights its novel role for mitochondrial function and energy homeostasis thereby linking USF2 to conditions such as insulin resistance, type-2 diabetes mellitus, and the metabolic syndrome.
ISSN:2213-2317
2213-2317
DOI:10.1016/j.redox.2020.101750