Abstract
Background
Studies have shown that hepatitis B virus (HBV)-associated B-cell non-Hodgkin lymphoma (NHL) constitutes a unique subgroup with distinct clinical features. It still leaves open the question of whether the integration of HBV DNA into the B-cell genome is a causal mechanism in the development of lymphoma.
Methods
Using the hybridisation capture-based next generation sequencing and RNA sequencing, we characterised the HBV integration pattern in 45 HBV-associated B-cell NHL tumour tissues.
Results
A total of 354 HBV integration sites were identified in 13 (28.9%) samples, indicating the relatively low integration frequency in B-cell NHLs. High plasma HBV DNA loads were not associated with the existence of HBV integration. The insertion sites distributed randomly across all the lymphoma genome without any preferential hotspot neither at the chromosomal level nor at the genetic level. Intriguingly, most HBV integrations were nonclonal in B-cell NHLs, implying that they did not confer a survival advantage. Analysis of the paired diagnosis-relapse samples showed the unstable status of HBV integrations during disease progression. Furthermore, transcriptomic analysis revealed the limited biological impact of HBV integration.
Conclusion
Our study provides an unbiased HBV integration map in B-cell NHLs, revealing the insignificant role of HBV DNA integration in B-cell lymphomagenesis.
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Data availability
All data generated or analysed during this study are included in this published article and its supplementary file.
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Acknowledgements
This work was supported by the High-throughput Genomics & Dig Data Analysis Core, Department of Medical Research, National Taiwan University Hospital for technical support and the National Center for High-performance Computing (NCHC) for providing computational and storage resources. We also thank the relevant medical staff and patients who contributed to this study.
Funding
This work was sponsored by the general research project grants from the National Science and Technology Council, Taiwan (NSTC 109-2314-B-002-276, NSTC 111-2314-B-002-126, and NSTC 112-2314-B-002-188).
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CC designed the study, interpreted data, did statistical analysis, and wrote the manuscript. YL interpreted next-generation sequencing data and performed bioinformatics analysis. CH performed transcriptome analysis. CL participated in the assembly of data and wrote the manuscript. CY performed an independent review of all pathology data. YL was responsible for DNA extraction and quantitative polymerase chain reaction. WF did a statistical analysis. PC designed the study, interpreted data, obtained funding, and wrote the manuscript. SY designed the study, interpreted data, obtained funding, and supervised the study. HT obtained funding, coordinated the study over the entire period, and wrote the manuscript.
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This study was approved by the Research Ethics Committee of the National Taiwan University Hospital and was performed in compliance with the Declaration of Helsinki (IRB No. 201911040RINB). Informed consent was obtained from all individual participants included in the study.
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Cheng, CL., Lin, YY., Hsu, CL. et al. Unraveling the role of hepatitis B virus DNA integration in B-cell lymphomagenesis. Br J Cancer 131, 996–1004 (2024). https://doi.org/10.1038/s41416-024-02763-y
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DOI: https://doi.org/10.1038/s41416-024-02763-y