Open Access

Peroxiredoxin 6 attenuates ischemia‑ and hypoxia‑induced liver damage of brain‑dead donors

  • Authors:
    • Qiang Tu
    • Yan Xiong
    • Lin Fan
    • Bingbing Qiao
    • Zhiping Xia
    • Long Hu
    • Yanfeng Wang
    • Guizhu Peng
    • Qifa Ye
  • View Affiliations

  • Published online on: November 19, 2015     https://doi.org/10.3892/mmr.2015.4587
  • Pages: 753-761
  • Copyright: © Tu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Oxidative stress induced by ischemia and hypoxia in the livers of donors after brain death (DBD) is associated with poor organ function and low patient survival rates in those receiving DBD liver transplants. Peroxiredoxin 6 (Prdx6) can defend cells against liver damage induced by oxidative stress. The present study aimed to investigate the role of Prdx6 in ischemia‑ and hypoxia‑induced liver damage in DBD livers. Liver tissue samples from ten DBD patients were collected. The control group constituted of six liver samples from patients with liver hemangioma that had accepted tumor excision surgery. Protein expression levels were determined by western blotting, cell viability was assessed using a CCK‑8 assay, intracellular reactive oxygen species (ROS) levels were measured using a ROS assay kit, and phospholipase A2 (PLA2) activity was measured using a PLA2 assay kit. In DBD liver samples, Prdx6 expression was downregulated and the nuclear factor‑κB (NF‑κB) signaling pathway was activated. Furthermore, when human liver L02 cells were exposed to ischemia and hypoxia, the expression of Prdx6 was reduced, causing an increase in reactive oxygen species (ROS); this in turn activated NF‑κB signaling and lowered cell viability (P<0.01). In agreement, overexpression of Prdx6 reduced ROS levels and improved cell viability. It was also demonstrated that inhibition of NF‑κB increased Prdx6 expression, while inhibition of Prdx6 limited PLA2 activity, exacerbating ischemia‑ and hypoxia‑induced cell damage. This data suggests that Prdx6 and its PLA2 activity have a protective role in DBD livers, the expression of which is regulated by NF‑κB. Thus, Prdx6 may be a novel target to alleviate liver damage in DBD.
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January-2016
Volume 13 Issue 1

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Online ISSN:1791-3004

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Spandidos Publications style
Tu Q, Xiong Y, Fan L, Qiao B, Xia Z, Hu L, Wang Y, Peng G and Ye Q: Peroxiredoxin 6 attenuates ischemia‑ and hypoxia‑induced liver damage of brain‑dead donors. Mol Med Rep 13: 753-761, 2016
APA
Tu, Q., Xiong, Y., Fan, L., Qiao, B., Xia, Z., Hu, L. ... Ye, Q. (2016). Peroxiredoxin 6 attenuates ischemia‑ and hypoxia‑induced liver damage of brain‑dead donors. Molecular Medicine Reports, 13, 753-761. https://doi.org/10.3892/mmr.2015.4587
MLA
Tu, Q., Xiong, Y., Fan, L., Qiao, B., Xia, Z., Hu, L., Wang, Y., Peng, G., Ye, Q."Peroxiredoxin 6 attenuates ischemia‑ and hypoxia‑induced liver damage of brain‑dead donors". Molecular Medicine Reports 13.1 (2016): 753-761.
Chicago
Tu, Q., Xiong, Y., Fan, L., Qiao, B., Xia, Z., Hu, L., Wang, Y., Peng, G., Ye, Q."Peroxiredoxin 6 attenuates ischemia‑ and hypoxia‑induced liver damage of brain‑dead donors". Molecular Medicine Reports 13, no. 1 (2016): 753-761. https://doi.org/10.3892/mmr.2015.4587