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Virologica Sinica

, Volume 34, Issue 4, pp 397–411 | Cite as

Mitochondria Redistribution in Enterovirus A71 Infected Cells and Its Effect on Virus Replication

  • Yang Yang
  • Haolong Cong
  • Ning Du
  • Xiaodong Han
  • Lei Song
  • Wenliang Zhang
  • Chunrui Li
  • Po TienEmail author
Research Article
  • 257 Downloads

Abstract

Enterovirus A71 (EV-A71) is one of the main causative agents of hand, foot and mouth disease (HFMD) and it also causes severe neurologic complications in infected children. The interactions between some viruses and the host mitochondria are crucial for virus replication and pathogenicity. In this study, it was observed that EV-A71 infection resulted in a perinuclear redistribution of the mitochondria. The mitochondria rearrangement was found to require the microtubule network, the dynein complex and a low cytosolic calcium concentration. Subsequently, the EV-A71 non-structural protein 2BC was identified as the viral protein capable of inducing mitochondria clustering. The protein was found localized on mitochondria and interacted with the mitochondrial Rho GTPase 1 (RHOT1) that is a key protein required for attachment between the mitochondria and the motor proteins, which are responsible for the control of mitochondria movement. Additionally, suppressing mitochondria clustering by treating cells with nocodazole, EHNA, thapsigargin or A23187 consistently inhibited EV-A71 replication, indicating that mitochondria recruitment played a crucial role in the EV-A71 life cycle. This study identified a novel function of the EV-A71 2BC protein and provided a potential model for the regulation of mitochondrial motility in EV-A71 infection.

Keywords

Enterovirus A71 (EV-A71) Mitochondria Microtubule network Calcium concentration Mitochondrial Rho GTPase 1 (RHOT1) 

Notes

Acknowledgements

This work was supported by grants from the National Natural Science Foundation of China (NSFC) (Grants Nos. 81621091, 31370201). We are grateful to Prof. Paul Chu, Guest Professor of the Institute of Microbiology, Chinese Academy of Sciences (CAS), for his help during the preparation of the manuscript. We thank Xiaolan Zhang and Tong Zhao, Institute of Microbiology, CAS, for technical help with confocal microscopy and flow cytometry. We also thank Fulian Liao and Weihua Zhuang for their assistance with the experiments.

Author Contributions

YY, HC and PT designed the research. YY and HC performed the experiments. ND, XH, LS, WZ and CL provided experiment support. YY and HC wrote the manuscript. All authors have read and approved the final manuscript for submission.

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.

Animal and Human Rights Statement

This article does not contain any studies with human or animal subjects performed by any of the authors.

Supplementary material

12250_2019_120_MOESM1_ESM.pdf (320 kb)
Supplementary material 1 (PDF 321 kb)

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Copyright information

© Wuhan Institute of Virology, CAS 2019

Authors and Affiliations

  1. 1.Center for Molecular Virology, CAS Key Laboratory of Pathogenic Microbiology and Immunology, Institute of MicrobiologyChinese Academy of SciencesBeijingChina
  2. 2.University of the Chinese Academy of SciencesBeijingChina
  3. 3.Beijing Institutes of Life ScienceChinese Academy of SciencesBeijingChina
  4. 4.College of Life SciencesInner Mongolia Agriculture UniversityHohhotChina

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