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Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition

  • Authors:
    • Siyue Qin
    • Changan Jiang
    • Ju Gao
  • View Affiliations / Copyright

    Affiliations: Department of Neurobiology, Shandong Provincial Key Laboratory of Mental Disorders, School of Medicine, Shandong University, Jinan, Shandong 250012, P.R. China, Key Laboratory of Obstetrics, Gynecologic and Pediatric Diseases and Birth Defects, Ministry of Education, Sichuan University, Chengdu, Sichuan 610065, P.R. China
    Copyright: © Qin et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 241-252
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    Published online on: October 21, 2019
       https://doi.org/10.3892/br.2019.1247
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Abstract

Aggrephagy, the aggresome‑related protein degradation system, represents a protective cellular response to shuttle misfolded proteins into the microtubule‑organizing center for degradation through the autophagic pathway during stress conditions, including heat shock, oxidative stress and proteasome inhibition. In response to proteasome failure, many genes are transcriptionally activated to facilitate ubiquitinated proteins to be cleared via the aggrephagy pathway. Although many regulators involved in aggresome formation have been identified, the mechanism how transcriptional activation promotes aggresome formation remains unknown. Here, we have demonstrated that nuclear factor erythroid 2‑related factor 2 (Nrf2) accumulated in the nucleus and activated the transcription of sequestosome‑1 (p62) during proteasome inhibition in 293 cells. Loss of Nrf2 resulted in failure of aggresome formation and cell death; whereas overexpression of p62 alleviated Nrf2 knockdown‑induced aggresome formation defects and promoted cell survival. Notably, blocking Nrf2 activation using a p38/MAPK inhibitor prevented proteasome inhibitor‑induced aggresome formation. These findings suggested that Nrf2 may be a critical regulator of aggresome formation, which protects cells from proteasome dysfunction‑induced stress.
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Copy and paste a formatted citation
Spandidos Publications style
Qin S, Jiang C and Gao J: Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition. Biomed Rep 11: 241-252, 2019.
APA
Qin, S., Jiang, C., & Gao, J. (2019). Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition. Biomedical Reports, 11, 241-252. https://doi.org/10.3892/br.2019.1247
MLA
Qin, S., Jiang, C., Gao, J."Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition". Biomedical Reports 11.6 (2019): 241-252.
Chicago
Qin, S., Jiang, C., Gao, J."Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition". Biomedical Reports 11, no. 6 (2019): 241-252. https://doi.org/10.3892/br.2019.1247
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Qin S, Jiang C and Gao J: Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition. Biomed Rep 11: 241-252, 2019.
APA
Qin, S., Jiang, C., & Gao, J. (2019). Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition. Biomedical Reports, 11, 241-252. https://doi.org/10.3892/br.2019.1247
MLA
Qin, S., Jiang, C., Gao, J."Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition". Biomedical Reports 11.6 (2019): 241-252.
Chicago
Qin, S., Jiang, C., Gao, J."Transcriptional factor Nrf2 is essential for aggresome formation during proteasome inhibition". Biomedical Reports 11, no. 6 (2019): 241-252. https://doi.org/10.3892/br.2019.1247
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