Wu J, Gan Z, Zhuo R, Zhang L, Wang T, Zhong X. Resveratrol Attenuates Aflatoxin B
1-Induced ROS Formation and Increase of m
6A RNA Methylation.
Animals (Basel) 2020;
10:ani10040677. [PMID:
32294948 PMCID:
PMC7222704 DOI:
10.3390/ani10040677]
[Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/04/2020] [Accepted: 04/09/2020] [Indexed: 12/13/2022] Open
Abstract
Simple Summary
Aflatoxin B1 (AFB1) is highly hepatotoxic in both animals and humans. Resveratrol, a naturally-occurring polyphenolic compound, has antioxidative, anti-inflammatory, antiapoptotic, and immunomodulatory functions and plays a critical role in preventing liver damage. However, whether N6-methyladenosine (m6A) mRNA methylation, which plays critical roles in regulating gene expression for fundamental cellular processes, is associated with the protective effects of resveratrol in attenuating aflatoxin B1 induced toxicity is unclear. Here, we found that AFB1-induced reactive oxygen species (ROS) accumulation changed m6A modification, and the role of resveratrol in alleviating the effect on hepatic disorder induced by aflatoxin B1 may be due to the removal of ROS, followed by the decreased abundance of m6A modification, and ultimately exerting its protective role in the liver. Together, this work provides key insights into the potential avenues for the treatment of AFB1-induced hepatotoxicity and other relevant liver diseases.
Abstract
Aflatoxin B1 (AFB1) is one of the most dangerous mycotoxins in both humans and animals. Regulation of resveratrol is essential for the inhibition of AFB1-induced oxidative stress and liver injury. Whether N6-methyladenosine (m6A) mRNA methylation participates in the crosstalk between resveratrol and AFB1 is unclear. The objective of this study was to investigate the effects of AFB1 and resveratrol in m6A RNA methylation and their crosstalk in the regulation of hepatic function in mice. Thirty-two C57BL/6J male mice were randomly assigned to a CON (basal diet), RES (basal diet + 500 mg/kg resveratrol), AFB1 (basal diet + 600 μg/kg aflatoxin B1), and ARE (basal diet + 500 mg/kg resveratrol and 600 μg/kg aflatoxin B1) group for 4 weeks of feeding (n = 8/group). Briefly, redox status, apoptosis, and m6A modification in the liver were assessed. Compared to the CON group, the AFB1 group showed increased activities of serum aspartate aminotransferase (AST) and alanine aminotransferase (ALT), prevalent vacuolization and cell edema, abnormal redox status, imbalance apoptosis, and especially, the higher expression of cleaved-caspase-3 protein. On the contrary, resveratrol ameliorated adverse hepatic function, via increasing hepatic antioxidative capacity and inhibiting the expression of cleaved-caspase-3 protein. Importantly, we noted that reactive oxygen species (ROS) content could be responsible for the alterations of m6A modification. Compared to the CON group, the AFB1 group elevated the ROS accumulation, which led to the augment in m6A modification, whereas dietary resveratrol supplementation decreased ROS, followed by the reduction of m6A levels. In conclusion, our findings indicated that resveratrol decreased AFB1-induced ROS accumulation, consequently contributing to the alterations of m6A modification, and eventually impacting on the hepatic function.
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