1
|
Olusola BA, Faneye AO, Oluwasemowo OO, Motayo BO, Adebayo S, Oludiran-Ayoade AE, Aleru B, George UE, Oragwa AO. Profiles of mutations in hepatitis B virus surface and polymerase genes isolated from treatment-naïve Nigerians infected with genotype E. J Med Microbiol 2021; 70. [PMID: 33704041 DOI: 10.1099/jmm.0.001338] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Introduction. Hepatitis B virus (HBV) infection is the leading cause of hepatitis, liver cirrhosis, and hepatocellular carcinoma (HCC). HBV genotype E (HBV/E) is the predominant genotype in West Africa and has been linked epidemiologically with chronic and occult HBV infections as well as development of HCC. Mutations in the surface and polymerase genes of HBV have been associated with occult infection, drug resistance, vaccine escape, as well as HCC.Hypothesis/Gap Statement. There is limited data on the occurrence and patterns of mutations associated with occult infection, drug resistance, vaccine escape and HCC for HBV/E.Aim. This study characterized amino acid (aa) substitutions in the major hydrophilic (MHR) and reverse transcriptase (RT) regions of the surface and polymerase genes respectively of HBV sequences from a group of Nigerians with genotype E infection. The CpG islands of the PreC/C and PreS/S regions of these sequences were also described.Methodology. HBV surface and polymerase genes were detected using PCR techniques. Occurrence of new and previously described mutations in these genes were analysed using phylogenetic techniques.Results. Overall 13 HBV isolates were each sequenced for polymerase and surface genes mutations. Thirteen and nine PreS/S and PreC/C HBV genes respectively were analysed for CpG islands. Mutations in the MHR and a-determinants region of the S protein were discovered in eleven and nine of the 13 tested isolates respectively. These mutations were concomitant with aa changes in the RT functional domains of the isolates. Mutations associated with vaccine escape, occult infection and poor HCC prognosis were identified in HBV/E isolated in this study. Furthermore, all the isolates had at least one putative nucleotide analogue resistance mutations. Drug resistance mutations had the highest association with CpG islands.Conclusion. The results of this study contribute to further understanding of HBV variability in Nigeria and the West African region. This will aid the planning of adequate HBV immunization and treatment programmes for the countries in the region.
Collapse
Affiliation(s)
- Babatunde A Olusola
- Department of Virology, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Adedayo O Faneye
- Department of Virology, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | | | - Babatunde O Motayo
- Federal Medical Center, Abeokuta, Nigeria.,Department of Virology, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Sopeju Adebayo
- Department of Virology, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Ayomide E Oludiran-Ayoade
- Present address: Department of Medical Microbiology and Immunology, University of Alberta, Edmonton, Alberta, Canada.,Department of Virology, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Bisola Aleru
- Department of Virology, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Uwem E George
- Department of Biological Sciences, Redeemer's University, Ede, Osun State, Nigeria
| | - Arthur O Oragwa
- Department of Veterinary Microbiology, Faculty of Veterinary Medicine, University of Jos, Jos-Plateau State, Nigeria
| |
Collapse
|
2
|
Zhong C, Lu H, Han T, Tan X, Li P, Huang J, Xie Q, Hou Z, Qu T, Jiang Y, Wang S, Xu L, Zhong Y, Huang T. CpG methylation participates in regulation of hepatitis B virus gene expression in host sperm and sperm-derived embryos. Epigenomics 2017; 9:123-125. [PMID: 27919171 DOI: 10.2217/epi-2016-0129] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
AIM This study was undertaken to investigate relationship between hepatitis B virus (HBV) CpG methylation and HBV gene transcription in sperm and sperm-derived embryos. METHODS HBV-infected patient sperm and HBV plasmid-transfected donor sperm were subjected to interspecific in vitro fertilization, methylation-specific PCR, bisulfite sequencing PCR, reverse transcription PCR and real-time quantitative PCR. RESULTS Positive methylation bands for CpG islands II and III in the HBV genome were observed in patient sperm but not in controls, and methylation percentages of CpG sites varied among different patient sperm samples. After fertilization, CpG sites were highly demethylated in embryos. Transcriptional levels of HBV X and S genes increased with decrease in CpG site methylation percentages. CONCLUSION HBV CpG sites can be methylated in patient sperm before maturation. Methylation of CpG islands II and III participates in transcriptional regulation of HBV X and S genes, respectively, in sperm and sperm-derived embryos.
Collapse
Affiliation(s)
- ChengYao Zhong
- Faculty of Science & Engineering, Paul Sabatier University-Toulouse III, Toulouse 31062, France
| | - Hui Lu
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - TingTing Han
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| | - XiaoFang Tan
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - PengHao Li
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| | - JiHua Huang
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| | - QingDong Xie
- Research Center for Reproductive Medicine, Shantou University Medical College, Shantou 515041, China
| | - ZhiWei Hou
- Key Laboratory of Birth Defects & Reproductive Health of the National Health & Family Planning Commission, Chongqing Population & Family Planning Science & Technology Research Institute, Chongqing 400020, China
| | - Ting Qu
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| | - Yang Jiang
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| | - Sheng Wang
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| | - Lan Xu
- The First Affiliated Hospital, Shantou University Medical College, Shantou 515041, China
| | - Ying Zhong
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| | - TianHua Huang
- Jinxin Research Institute for Reproductive Medicine & Genetics, Chengdu Jinjiang Hospital for Maternal & Child Health Care, Chengdu 610066, China
| |
Collapse
|
3
|
Xue Y, Wang MJ, Huang SY, Yang ZT, Yu DM, Han Y, Zhu MY, Huang D, Zhang DH, Gong QM, Zhang XX. Characteristics of CpG Islands and their quasispecies of full-length hepatitis B virus genomes from patients at different phases of infection. SPRINGERPLUS 2016; 5:1630. [PMID: 27722049 PMCID: PMC5031574 DOI: 10.1186/s40064-016-3192-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 09/01/2016] [Indexed: 12/23/2022]
Abstract
BACKGROUND CpG islands in hepatitis B virus (HBV) genome are potential targets for methylation mediated gene silencing, and may be involved in the pathogenesis of HBV infection. To date, their characteristics in HBV quasispecies (QS) remain largely unknown. The purpose of this study was to investigate the characteristics of CpG islands in HBV QS. METHODS Forty patients diagnosed as acute hepatitis B (AHB, n = 10), immune-tolerant HBV carriers (IT, n = 9), chronic hepatitis B (CHB, n = 11), or acute on chronic liver failure (ACLF, n = 10), were enrolled in this case-control study. A total of 599 clones were isolated, and full-length HBV genomes were sequenced. RESULTS CpG island II (CGII) in AHB group was shorter in length and its QS heterogeneity was lower than that in the chronic infection group. Among the chronic infection subgroups, CGII and CpG island III (CGIII) in IT group were longer and their heterogeneity was lower compared to CHB and ACLF groups. Length of CGII correlated with HBV DNA levels positively while the complexity and diversity of CGII correlated with HBV DNA levels negatively. Moreover, CGII and CGIII were shorter in genotype B than those in genotype C, while QS complexity and diversity of either CGII or CGIII had no significant difference between genotype B and C. CONCLUSIONS Overall, our results suggest that the distribution, length and QS heterogeneity of CpG islands in full-length HBV genome differ across clinical phases of infection, of which the mechanism warrants further study.
Collapse
Affiliation(s)
- Yuan Xue
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Ming-Jie Wang
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Su-Yuan Huang
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Zhi-Tao Yang
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - De-Min Yu
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Yue Han
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Ming-Yu Zhu
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Dao Huang
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Dong-Hua Zhang
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Qi-Ming Gong
- Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| | - Xin-Xin Zhang
- Clinical Virology Research Laboratory, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, No. 197, Ruijin Er Road, Shanghai, 200025 China.,Department of Infectious Diseases, Institute of Infectious and Respiratory Diseases, Ruijin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Translational Medicine Research Center, Ruijin Hospital North, Shanghai Jiaotong University, School of Medicine, Shanghai, China.,Pôle Sino-Français de Recherches en Science du Vivant et Génomique, Rui Jin Hospital, Shanghai Jiaotong University, School of Medicine, Shanghai, China
| |
Collapse
|