Transcriptomic analysis of mouse liver reveals a potential hepato-enteric pathogenic mechanism in acute Toxoplasma gondii infection

He, Jun-Jun; Ma, Jun; Elsheikha, Hany M.; Song, Hui-Qun; Huang, Si-Yang; Zhu, Xing-Quan

Abstract

Background

Toxoplasma gondii is a worldwide spread pathogen which can infect all tissues of its host. The transcriptomic responses of infected brain and spleen have been reported. However, our knowledge of the global transcriptomic change in infected liver is limited. Additionally, T. gondii infection represents a highly dynamic process involving complex biological responses of the host at many levels. Herein, we describe such processes at a global level by discovering gene expression changes in mouse livers after acute infection with T. gondii ToxoDB#9 strain.

Results

Global transcriptomic analysis identified 2,758 differentially expressed transcripts in infected liver, of which 1,356 were significantly downregulated and 1,402 upregulated. GO and KEGG database analyses showed that host immune responses were upregulated, while the metabolic-related processes/pathways were downregulated, especially xenobiotic metabolism, fatty acid metabolism, energy metabolism, and bile biosynthesis and secretion. The metabolism of more than 800 chemical compounds including anti-Toxoplasma prescribed medicines were predicted to be modulated during acute T. gondii infection due to the downregulation of enzymes involved in xenobiotic metabolism.

Conclusions

To the best of our knowledge, this is the first global transcriptomic analysis of mouse liver infected by T. gondii. The present data indicate that during the early stage of liver infection, T. gondii can induce changes in liver xenobiotic metabolism, upregulating inflammatory response and downregulating hepatocellular PPAR signaling pathway, altering host bile biosynthesis and secretion pathway; these changes could enhance host intestinal dysbacteriosis and thus contribute to the pathological changes of both liver and intestine of infected mice. These findings describe the biological changes in infected liver, providing a potential mechanistic pathway that links hepatic and intestinal pathologies to T. gondii infection.

Citation

He, J., Ma, J., Elsheikha, H. M., Song, H., Huang, S., & Zhu, X. (2016). Transcriptomic analysis of mouse liver reveals a potential hepato-enteric pathogenic mechanism in acute Toxoplasma gondii infection. Parasites and Vectors, 9(1), Article 427. https://doi.org/10.1186/s13071-016-1716-x

• Journal Article Type: Article
• Acceptance Date: Jul 20, 2016
• Online Publication Date: Aug 3, 2016
• Publication Date: Aug 3, 2016
• Deposit Date: Jul 6, 2017
• Publicly Available Date: Jul 6, 2017
• Journal: Parasites & Vectors
• Electronic ISSN: 1756-3305
• Publisher: Springer Verlag
• Peer Reviewed: Peer Reviewed
• Volume: 9
• Issue: 1
• Article Number: 427
• DOI: https://doi.org/10.1186/s13071-016-1716-x
• Keywords: Toxoplasma gondii, Mouse liver, Transcriptome, RNA-seq, Liver function
• Public URL: https://nottingham-repository.worktribe.com/output/806740
• Publisher URL: https://doi.org/10.1186/s13071-016-1716-x