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Multiple microRNAs function as self-protective modules in acetaminophen-induced hepatotoxicity in humans

  • Organ Toxicity and Mechanisms
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Abstract

Acetaminophen (APAP) overdose is the leading cause of acute liver failure. Yet the mechanisms underlying adaptive tolerance toward APAP-induced liver injury are not fully understood. To better understand molecular mechanisms contributing to adaptive tolerance to APAP is an underpinning foundation for APAP-related precision medicine. In the current study, the mRNA and microRNA (miRNA) expression profiles derived from next generation sequencing data for APAP-treated (5 and 10 mM) HepaRG cells and controls were analyzed systematically. Putative miRNAs targeting key dysregulated genes involved in APAP hepatotoxicity were selected using in silico prediction algorithms, un-biased gene ontology, and network analyses. Luciferase reporter assays, RNA electrophoresis mobility shift assays, and miRNA pull-down assays were performed to investigate the role of miRNAs affecting the expression of dysregulated genes. Levels of selected miRNAs were measured in serum samples obtained from children with APAP overdose (58.6–559.4 mg/kg) and from healthy controls. As results, 2758 differentially expressed genes and 47 miRNAs were identified. Four of these miRNAs (hsa-miR-224-5p, hsa-miR-320a, hsa-miR-449a, and hsa-miR-877-5p) suppressed drug metabolizing enzyme (DME) levels involved in APAP-induced liver injury by downregulating HNF1A, HNF4A and NR1I2 expression. Exogenous transfection of these miRNAs into HepaRG cells effectively rescued them from APAP toxicity, as indicated by decreased alanine aminotransferase levels. Importantly, hsa-miR-320a and hsa-miR-877-5p levels were significantly elevated in serum samples obtained from children with APAP overdose compared to health controls. Collectively, these data indicate that hsa-miR-224-5p, hsa-miR-320a, hsa-miR-449a, and hsa-miR-877-5p suppress DME expression involved in APAP-induced hepatotoxicity and they contribute to an adaptive response in hepatocytes.

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Acknowledgements

This work was supported by the US FDA, protocol # E0731311. B. N., W. T., R. D. B. and L. J. proposed and organized the study; D. Y., P. G. and B. N. designed the study; D. Y., S. C., Y. J. and J. S. conducted the total RNA extraction; L. W., W. X., H. H., L. S., S. B., S. M., H. F. and T. S. analyzed the gene and miRNA expression data; D. Y., Z. R., Y. W., Y. C., and L. Z. conducted the Reporter assays and RNA EMSA assays; D. Y., V. T., I. P., S. M. and S. B. conducted miRNA pull-down experiment; B. K., J. S. and L. S. provided the technical support; X. Y., K. D., Y. G, L. J. and L. S analyzed the miRNA levels in serum samples. D. Y. and B. N. wrote the manuscript; W. H. T, W. X., L. G., Y. G., W. M., L. J., P. G., S. B., S. M., N. M., I. P. and W. T. contributed to data interpretation and revised the manuscript. All authors reviewed the manuscript.

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Correspondence to Laura James, Weida Tong or Baitang Ning.

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The authors declare no competing financial interests.

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Disclaimer: The views presented in this paper are those of the authors and do not necessarily represent those of the U.S. Food and Drug Administration.

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Yu, D., Wu, L., Gill, P. et al. Multiple microRNAs function as self-protective modules in acetaminophen-induced hepatotoxicity in humans. Arch Toxicol 92, 845–858 (2018). https://doi.org/10.1007/s00204-017-2090-y

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  • DOI: https://doi.org/10.1007/s00204-017-2090-y

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