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Human cytomegalovirus miR-UL36-5p inhibits apoptosis via downregulation of adenine nucleotide translocator 3 in cultured cells

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Abstract

Human cytomegalovirus (HCMV) encodes at least 26 microRNAs (miRNA). These miRNAs are utilized by HCMV to regulate its own genes as well as the genes of the host cell during infection. It has been reported that a cellular gene, solute carrier family 25, member 6 (SLC25A6), which is also designated adenine nucleotide translocator 3 (ANT3), was identified as a candidate target of hcmv-miR-UL36-5p by hybrid PCR. In this study, ANT3 was further demonstrated to be a direct target of hcmv-miR-UL36-5p by luciferase reporter assays. The expression level of ANT3 protein was confirmed, by western blotting, to be directly downregulated by overexpression of hcmv-miR-UL36-5p in HEK293 cells, U373 cells and HELF cells. Moreover, HCMV-infected cells showed a decrease in the ANT3 protein level. Using ANT3-specific small interfering RNA (siRNA) and an inhibitor for hcmv-miR-UL36-5p, it was shown that inhibition of apoptosis by hcmv-miR-UL36-5p in these cells specifically occurred via inhibition of ANT3 expression. These results imply that hcmv-miR-UL36-5 may play the same role during actual HCMV infection in order to establish a balance between the host cell and the virus.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (81171580 and 81371788) and the Specialized Research Fund for the Doctoral Program of Higher Education (20112104110012) and the Outstanding Scientific Fund of Shengjing Hospital

Conflict of interest

The authors declare no conflict of interest.

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Authors and Affiliations

  1. Virus Laboratory, Affiliated Shengjing Hospital, China Medical University, Shenyang, 110004, Liaoning, China

    Xin Guo, Yujing Huang, Ying Qi, Zhongyang Liu, Yanping Ma, Yaozhong Shao, Shujuan Jiang, Zhengrong Sun & Qiang Ruan

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  1. Xin Guo
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  2. Yujing Huang
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Correspondence to Qiang Ruan.

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Guo, X., Huang, Y., Qi, Y. et al. Human cytomegalovirus miR-UL36-5p inhibits apoptosis via downregulation of adenine nucleotide translocator 3 in cultured cells. Arch Virol 160, 2483–2490 (2015). https://doi.org/10.1007/s00705-015-2498-8

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