The dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study
Abstract Background Previous works have observed that younger infants with chronic hepatitis B virus (HBV) infection are more responsive to antiviral treatment. However, the underlying mechanism remains unclear. In this study, the dynamic changes of HBV quasispecies in infants with immunoprophylaxis...
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oai:doaj.org-article:70ec5185eb9d477aa20ec95d85694a282021-12-05T12:03:05ZThe dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study10.1186/s12985-021-01707-91743-422Xhttps://doaj.org/article/70ec5185eb9d477aa20ec95d85694a282021-11-01T00:00:00Zhttps://doi.org/10.1186/s12985-021-01707-9https://doaj.org/toc/1743-422XAbstract Background Previous works have observed that younger infants with chronic hepatitis B virus (HBV) infection are more responsive to antiviral treatment. However, the underlying mechanism remains unclear. In this study, the dynamic changes of HBV quasispecies in infants with immunoprophylaxis failure were investigated to provide virological explanations for clinical management on infantile antiviral therapy. Methods Thirteen 7-month-old infants with immunoprophylaxis failure and their mothers were enrolled from a prospective cohort, and 8 of them were followed up to 3 years old. The sequences of HBV quasispecies were analyzed by the full-length genome clone-based sequencing, and compared among mothers and their infants at different ages. Results The results revealed that the complexity, mutation frequency and genetic distance of HBV quasispecies decreased significantly at full-length, partial open reading frames and regulatory regions of HBV genome at nucleotide level in 7-month-old infants comparing with their mothers, whereas increased significantly to near the maternal level when infants grew up to 3 years old. Furthermore, similar changes were also found in Core, PreS2, RT and P regions of HBV genome at amino acid level, especially for potential NAs-resistant mutants in RT region and immune-escape mutants in Core and PreS2 regions. Conclusions This study uncovered the evolution of HBV quasispecies in infancy after mother-to-child transmission, which may provide the virological evidence for explaning that younger children are more responsive to antiviral therapy.Yi LiYiwei XiaoLili LiYarong SongXiangjun ZhaiJianxun LiuZhongping DuanLing YanFeng DingJia LiuLiguo ZhuJie JiangHuaibin ZouLingxiang LiCaihong LiangJie WangJie LiBMCarticleHepatitis B virusQuasispeciesMother-to-child transmissionImmunoprophylaxis failureInfantile antiviral therapyInfectious and parasitic diseasesRC109-216ENVirology Journal, Vol 18, Iss 1, Pp 1-11 (2021) |
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DOAJ |
| collection |
DOAJ |
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EN |
| topic |
Hepatitis B virus Quasispecies Mother-to-child transmission Immunoprophylaxis failure Infantile antiviral therapy Infectious and parasitic diseases RC109-216 |
| spellingShingle |
Hepatitis B virus Quasispecies Mother-to-child transmission Immunoprophylaxis failure Infantile antiviral therapy Infectious and parasitic diseases RC109-216 Yi Li Yiwei Xiao Lili Li Yarong Song Xiangjun Zhai Jianxun Liu Zhongping Duan Ling Yan Feng Ding Jia Liu Liguo Zhu Jie Jiang Huaibin Zou Lingxiang Li Caihong Liang Jie Wang Jie Li The dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study |
| description |
Abstract Background Previous works have observed that younger infants with chronic hepatitis B virus (HBV) infection are more responsive to antiviral treatment. However, the underlying mechanism remains unclear. In this study, the dynamic changes of HBV quasispecies in infants with immunoprophylaxis failure were investigated to provide virological explanations for clinical management on infantile antiviral therapy. Methods Thirteen 7-month-old infants with immunoprophylaxis failure and their mothers were enrolled from a prospective cohort, and 8 of them were followed up to 3 years old. The sequences of HBV quasispecies were analyzed by the full-length genome clone-based sequencing, and compared among mothers and their infants at different ages. Results The results revealed that the complexity, mutation frequency and genetic distance of HBV quasispecies decreased significantly at full-length, partial open reading frames and regulatory regions of HBV genome at nucleotide level in 7-month-old infants comparing with their mothers, whereas increased significantly to near the maternal level when infants grew up to 3 years old. Furthermore, similar changes were also found in Core, PreS2, RT and P regions of HBV genome at amino acid level, especially for potential NAs-resistant mutants in RT region and immune-escape mutants in Core and PreS2 regions. Conclusions This study uncovered the evolution of HBV quasispecies in infancy after mother-to-child transmission, which may provide the virological evidence for explaning that younger children are more responsive to antiviral therapy. |
| format |
article |
| author |
Yi Li Yiwei Xiao Lili Li Yarong Song Xiangjun Zhai Jianxun Liu Zhongping Duan Ling Yan Feng Ding Jia Liu Liguo Zhu Jie Jiang Huaibin Zou Lingxiang Li Caihong Liang Jie Wang Jie Li |
| author_facet |
Yi Li Yiwei Xiao Lili Li Yarong Song Xiangjun Zhai Jianxun Liu Zhongping Duan Ling Yan Feng Ding Jia Liu Liguo Zhu Jie Jiang Huaibin Zou Lingxiang Li Caihong Liang Jie Wang Jie Li |
| author_sort |
Yi Li |
| title |
The dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study |
| title_short |
The dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study |
| title_full |
The dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study |
| title_fullStr |
The dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study |
| title_full_unstemmed |
The dynamic changes of HBV quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study |
| title_sort |
dynamic changes of hbv quasispecies diversity in infancy after immunoprophylaxis failure: a prospective cohort study |
| publisher |
BMC |
| publishDate |
2021 |
| url |
https://doaj.org/article/70ec5185eb9d477aa20ec95d85694a28 |
| work_keys_str_mv |
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