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RETRACTED ARTICLE: Deoxynivalenol-induced alterations in the redox status of HepG2 cells: identification of lipid hydroperoxides, the role of Nrf2-Keap1 signaling, and protective effects of zinc

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This article was retracted on 20 August 2021

A Correction to this article was published on 23 April 2020

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Abstract

Deoxynivalenol (DON) is a type B trichothecenes that is widely contaminating human and animal foods, leading to several toxicological implications if ingested. Induction of oxidative stress and production of lipid peroxides were suggested to be the reasons for DON-induced cytotoxicity. However, detailed and comprehensive profiling of DON-related lipid hydroperoxides was not identified. Furthermore, the mechanisms behind DON-induced cytotoxicity and oxidative stress have received less attention. Zinc (Zn) is an essential element that has antioxidant activities; however, the protective effects of Zn against DON-induced adverse effects were not examined. Therefore, this study was undertaken to investigate DON-induced cytotoxicity and oxidative damage to human HepG2 cell lines. Furthermore, a quantitative estimation for the formed lipid hydroperoxides was conducted using LC-MS/MS. In addition, DON-induced transcriptomic changes on the inflammatory markers and antioxidant enzymes were quantitatively examined using qPCR. The protective effects of Zn against DON-induced cytotoxicity and oxidative stress, the formation of lipid hydroperoxides (LPOOH), and antioxidant status in HepG2 cells were investigated. Finally, the effects of DON and Zn on the Nrf2-Keap1 pathway were further explored. The achieved results indicated that DON caused significant cytotoxicity in HepG2 cells accompanied by significant oxidative damage and induction of the inflammatory markers. Identification of DON-related LPOOH revealed the formation of 22 LPOOH species including 14 phosphatidylcholine hydroperoxides, 5 triacylglycerol hydroperoxides, and 3 cholesteryl ester hydroperoxides. DON caused significant downregulation of Nrf2-regulated antioxidant enzymes. Zn administration led to significant protection of HepG2 cells against DON-induced adverse effects, probably via activation of the Nrf2-Keap1 pathway.

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Abbreviations

DON:

Deoxynivalenol

Zn:

Zinc

HepG2:

Human liver hepatoma cell lines

PCOOH:

Phosphatidylcholine hydroperoxides

TGOOH:

Triacylglycerol hydroperoxides

CEOOH:

Cholesteryl ester hydroperoxides

DMEM:

Dulbecco’s modified Eagle’s medium

DCF-DA:

2′,7′-Dichlorofluorescein diacetate

qPCR:

Quantitative real-time PCR

GST:

Glutathione-S-transferases

NQO1:

NAD(P)H dehydrogenase [quinone] 1

HO 1:

Heme oxygenase 1

SOD:

Superoxide dismutase

CAT:

Catalase

Nrf2:

Erythroid 2–related factor 2

Keap1:

Kelch-like ECH-associated protein-1

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Acknowledgments

This study was supported by the Ministry of Education, Culture, Sports, Science and Technology, Japan.

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Correspondence to Shu-Ping Hui.

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The authors declare that they have no conflict of interest.

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The original version of this article was revised: The original version of this paper was published with error. The presentation of author name "Tan Hui" should be "Hui Tan".

This article has been retracted. Please see the retraction notice for more detail: https://dx.doi.org/10.1007/s12550-021-00440-0

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Darwish, W.S., Chen, Z., Li, Y. et al. RETRACTED ARTICLE: Deoxynivalenol-induced alterations in the redox status of HepG2 cells: identification of lipid hydroperoxides, the role of Nrf2-Keap1 signaling, and protective effects of zinc. Mycotoxin Res 36, 287–299 (2020). https://doi.org/10.1007/s12550-020-00392-x

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  • DOI: https://doi.org/10.1007/s12550-020-00392-x

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