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Mycotoxins and cellular senescence: the impact of oxidative stress, hypoxia, and immunosuppression

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Abstract

Mycotoxins induce oxidative stress, hypoxia, and cause immunosuppressive effects. Moreover, emerging evidence show that mycotoxins have a potential of inducing cellular senescence, which are involved in their immunomodulatory effects. Mycotoxins upregulate the expression of senescence markers γ-H2AX, senescence-associated β-galactosidase, p53, p16, and senescence-associated secretory phenotype (SASP) inflammatory factors. Moreover, mycotoxins cause senescence-associated cell cycle arrest by diminishing cyclin D1 and Cdk4 pathways, as well as increasing the expression of p53, p21, and CDK6. Mycotoxins may induce cellular senescence by activating reactive oxygen species (ROS)-induced oxidative stress. In addition, hypoxia acts as a double-edged sword on cell senescence; it could both act as the stress-induced senescence and also hinder the onset of cellular senescence. The SASP inflammatory factors have the ability to induce an immunosuppressive environment, while mycotoxins directly cause immunosuppression. Therefore, there is a potential relationship between mycotoxins and cellular senescence that synergistically cause immunosuppression. However, most of the current studies have involved the effect of mycotoxins on cell cycle arrest, but only limited in-depth research has been carried out to link the occurrence of this condition (cell cycle arrest) with cellular senescence.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant no. 31972741); MH CZ—DRO (UHHK, 00179906); the Excellence project PrF UHK 2217/2022-2023 Czech Republic; Research Program of University of Granada, Spain; Scientific Grant Agency (VEGA Project (1/0482/20).

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Correspondence to Qinghua Wu or Kamil Kuca.

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You, L., Nepovimova, E., Valko, M. et al. Mycotoxins and cellular senescence: the impact of oxidative stress, hypoxia, and immunosuppression. Arch Toxicol 97, 393–404 (2023). https://doi.org/10.1007/s00204-022-03423-x

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  • DOI: https://doi.org/10.1007/s00204-022-03423-x

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