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Yang Z, Zhuo Q, Qin W, Wang J, Wang L, Tien P. MicroRNAs miR-18a and miR-452 regulate the replication of enterovirus 71 by targeting the gene encoding VP3. Virus Genes 2021; 57:318-326. [PMID: 34002325 DOI: 10.1007/s11262-021-01842-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Accepted: 05/05/2021] [Indexed: 11/29/2022]
Abstract
MicroRNAs (miRNAs) are crucial in the process of host-pathogen interaction. In this study, we established a screening system for miRNAs of target genes to detect the effect of miRNAs on Enterovirus 71 (EV71) replication in rhabdomyosarcoma (RD) cells. A 3'-untranslated region (UTR) dual-luciferase assay was performed to confirm putative miRNA targets in EV71 genome. Firstly, 13 fragments of EV71 genome were inserted into the vector pMIR, and luciferase activities were analyzed to identify the putative miRNAs of target genes. The expression of the reporter protein was significantly downregulated in cells transfected with the vector containing gene VP3. Then we screened for miRNAs that might target to VP3 through online analysis software. In addition, Western blot, real-time PCR, virus titration, and morphological changes were considered to examine the effects of miRNAs on virus replication. The results suggested that miR-18a and miR-452 repress the reproduction of EV71 virus by binding to VP3. Moreover, EV71 infection also affected the expression of endogenous miR-18a and miR-452. In addition, no significant cytotoxic effects were observed. The results from this study suggest that the intracellular miRNAs may play vital roles in the host-virus interaction.
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Affiliation(s)
- Zhuo Yang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China.
| | - Qin Zhuo
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Wen Qin
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Jingbo Wang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Liyuan Wang
- National Institute for Nutrition and Health, Chinese Center for Disease Control and Prevention, Beijing, 100050, China
| | - Po Tien
- Key Laboratory of Pathogenic Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, China
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Won YJ, Kang LH, Lee AR, Paik B, Kim H, Lee SG, Park SW, Hong SJ, Paik SY. Sequence analysis of the first B5 subgenogroup strain of enterovirus 71 isolated in Korea. J Microbiol 2020; 58:422-429. [PMID: 32222942 PMCID: PMC7223378 DOI: 10.1007/s12275-020-9539-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 02/04/2020] [Accepted: 02/13/2020] [Indexed: 11/25/2022]
Abstract
Enterovirus A71 (EV71), the main etiological agent of handfoot- mouth disease (HFMD), circulates in many areas of the world and has caused large epidemics since 1997, especially in the Asia-Pacific region. In this study, we determined the full-genome sequence of CMC718, a newly isolated EV71 strain in Korea. The CMC718 genome was 7,415 nucleotides in length and was confirmed by whole-genome phylogenetic analysis to belong to the B5 genotype. In particular, CMC718 demonstrated maximum identity with strain M988 of the B5 genotype and numerous amino acid variants were detected in the 3D domain of the viral protein P3, which is consistent with the mutation pattern of a B5 strain isolated in 2012–2013. Comparison of the CMC718 sequence with other EV71 reference strains confirmed the relationship and genetic variation of CMC718. Our study was a full-genome sequence analysis of the first EV71 strain of the B5 genotype isolated in South Korea. This information will be a valuable reference for the development of methods for the detection of recombinant viruses, the tracking of infections, and the diagnosis of EV71.
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Affiliation(s)
- Yu Jung Won
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Lae Hyung Kang
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Ah Ra Lee
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Bomina Paik
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Hyun Kim
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea
| | - Sung Geun Lee
- Korea Zoonosis Research Institute, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Seung Won Park
- Department of Biotechnology, Daegu Catholic University, Gyeongsan-si, Gyeongsangbuk-do, 38430, Republic of Korea
| | - Seung Jin Hong
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea.
| | - Soon Young Paik
- Department of Microbiology, College of Medicine, The Catholic University of Korea, Seoul, 06591, Republic of Korea.
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Li J, Li Y, Zhang S, Ma H, Liu X, Liang Z, Zhang W, Jing H, Du Y, Yang Y, Huo D, Chen L, Wang Q. Analysis of an Imported Subgenotype C2 Strain of Human Enterovirus 71 in Beijing, China, 2015. Front Microbiol 2018; 9:2337. [PMID: 30323801 PMCID: PMC6172327 DOI: 10.3389/fmicb.2018.02337] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Accepted: 09/12/2018] [Indexed: 11/21/2022] Open
Abstract
Background: Subgenotype C4 of enterovirus 71 (EV71) is the predominant agent of Hand Foot and Mouth disease (HFMD) circulating in the mainland of China. For the first time, a subgenotype C2 of EV71 named SY30-2 was isolated from a HFMD case in Beijing, China. Since it is uncertain whether antibodies raised against subgenotype C4 of EV71 can protect C2 EV71, it is important to monitor and check the presence of cross-reactive antibodies against new EV71 subgenotypes. To find out the causes for the different NtAb, this study is to investigate the relationships between amino acid residue variations and cross-reactive antibodies against EV71 subgenotypes C2 and C4. Methods: Nucleotide and amino acid sequences from full-length genome sequence of SY30-2 were compared to EV71 reference strains. A microneutralization test was used to detect neutralizing antibody (NTAb) in the sera of subgenotype C4 of EV71 infected cases against SY30-2 and FY17 (a C4 isolate). The 3D structure of the viral capsid protein of SY30-2 was constructed. Results: Genome sequence and similarity plot analyses showed that SY30-2 shared the highest identity with subgenotype C2 of EV71 strains in every fragment of the genome. While the microneutralization test result showed that children infected with subgenotype C4 of EV71 had higher NTAb titers against FY17 than SY30-2 (p < 0.001). The amino acid sequence comparison revealed that four amino acid residues VP1-22, VP1-31, VP1-249 and VP3-93 were highly conserved in subgenotype C4 of EV71 compared with the corresponding amino acid residues on subgenotype C2 of EV71 (p < 0.05). Furthermore, the 3D-structure of viral capsid protein showed that VP1-22, VP1-31 and VP3-93 were located on the surface of virion. Conclusion: This is the first report of an EV71 subgenotype C2 isolated from HFMD in Beijing, China. Only a few antigenic variations on subgenotype C2 of EV71 could have led to a great decrease in NTAb titer. Thus, imported new genotypes and subgenotypes of EV71 should be closely monitored. The efficacy of available vaccines against new viruses should be evaluated as well.
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Affiliation(s)
- Jie Li
- Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Center for Preventive Medicine Research, Beijing, China.,Beijing Shunyi Center for Disease Prevention and Control, Beijing, China
| | - Yindong Li
- Beijing Shunyi Center for Disease Prevention and Control, Beijing, China
| | - Songjian Zhang
- Beijing Shunyi Center for Disease Prevention and Control, Beijing, China
| | - Hongmei Ma
- Beijing Shunyi Center for Disease Prevention and Control, Beijing, China
| | - XiaoXiao Liu
- Beijing Xi Cheng Center for Disease Prevention and Control, Beijing, China
| | - Zhichao Liang
- Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Center for Preventive Medicine Research, Beijing, China
| | - Wenzeng Zhang
- Beijing Shunyi Center for Disease Prevention and Control, Beijing, China
| | - Hongbo Jing
- Beijing Shunyi Center for Disease Prevention and Control, Beijing, China
| | - Yiwei Du
- Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Center for Preventive Medicine Research, Beijing, China
| | - Yang Yang
- Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Center for Preventive Medicine Research, Beijing, China
| | - Da Huo
- Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Center for Preventive Medicine Research, Beijing, China
| | - Lijuan Chen
- Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Center for Preventive Medicine Research, Beijing, China
| | - Quanyi Wang
- Beijing Center for Disease Prevention and Control, Beijing, China.,Beijing Center for Preventive Medicine Research, Beijing, China
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