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Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression

SIMPLE SUMMARY: The quantitative assessment of hepatitis B virus (HBV) covalently closed circular DNA (cccDNA) is essential to the development of next generation antiviral therapies against hepatitis B. Here, we developed a peptide nucleic acid (PNA)-clamping qPCR method to quantify cccDNA, which wa...

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Autores principales: Hsu, Chao-Wei, Chu, Yu-De, Lai, Ming-Wei, Lin, Chih-Lang, Liang, Kung-Hao, Lin, Yang-Hsiang, Yeh, Chau-Ting
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7867012/
https://www.ncbi.nlm.nih.gov/pubmed/33572617
http://dx.doi.org/10.3390/cancers13030538
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author Hsu, Chao-Wei
Chu, Yu-De
Lai, Ming-Wei
Lin, Chih-Lang
Liang, Kung-Hao
Lin, Yang-Hsiang
Yeh, Chau-Ting
author_facet Hsu, Chao-Wei
Chu, Yu-De
Lai, Ming-Wei
Lin, Chih-Lang
Liang, Kung-Hao
Lin, Yang-Hsiang
Yeh, Chau-Ting
author_sort Hsu, Chao-Wei
collection PubMed
description SIMPLE SUMMARY: The quantitative assessment of hepatitis B virus (HBV) covalently closed circular DNA (cccDNA) is essential to the development of next generation antiviral therapies against hepatitis B. Here, we developed a peptide nucleic acid (PNA)-clamping qPCR method to quantify cccDNA, which was comparable to the recently proposed exonuclease-based cccDNA assays. Using this method, we showed that cccDNA levels in the para-neoplastic liver tissues were independently correlated with overall survival, as well as extrahepatic metastasis in patients with or without virological suppression. These results suggest that in HBV-related hepatocellular carcinoma, patients under antiviral suppression might further benefit from new antivirals, which are designed to reduce cccDNA. ABSTRACT: New antiviral therapies against hepatitis B virus (HBV) focus on the elimination of covalently closed circular DNA (cccDNA). However, traditional cccDNA-specific quantitative PCR (qPCR) has a narrow effective range, hindering a reliable comparison between the levels of biopsy-derived cccDNAs. Collaterally, the prognostic role of cccDNA in HBV-related hepatocellular carcinoma (HCC) cannot be clearly defined. Here, we developed a peptide nucleic acid (PNA)-clamping qPCR method to provide a wider range of specific cccDNA quantification (up to 5 logs of effective range). Extrachromosomal DNA was extracted from para-neoplastic tissues for cccDNA quantification. In total, 350 HBV-related HCC patients were included for an outcome analysis. Without differential pre-dilution, cccDNA levels in para-neoplastic liver tissues were determined, ranging from < 2 × 10(3) to 123.0 × 10(6) copies/gram. The multivariate linear regression analysis showed that cccDNA was independently correlated with the HBV e antigen (p < 0.001) and serum HBV-DNA levels (p = 0.012). The Cox proportional hazard model analysis showed that cccDNA independently predicted overall survival (p = 0.003) and extrahepatic metastasis-free survival (p = 0.001). In virologically suppressed HCC patients, cccDNA still effectively predicted intrahepatic recurrence-free (p = 0.003) and extrahepatic metastasis-free (p = 0.009) survivals. In conclusion, cccDNA independently predicted postoperative extrahepatic metastasis-free survival.
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spelling pubmed-78670122021-02-07 Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression Hsu, Chao-Wei Chu, Yu-De Lai, Ming-Wei Lin, Chih-Lang Liang, Kung-Hao Lin, Yang-Hsiang Yeh, Chau-Ting Cancers (Basel) Article SIMPLE SUMMARY: The quantitative assessment of hepatitis B virus (HBV) covalently closed circular DNA (cccDNA) is essential to the development of next generation antiviral therapies against hepatitis B. Here, we developed a peptide nucleic acid (PNA)-clamping qPCR method to quantify cccDNA, which was comparable to the recently proposed exonuclease-based cccDNA assays. Using this method, we showed that cccDNA levels in the para-neoplastic liver tissues were independently correlated with overall survival, as well as extrahepatic metastasis in patients with or without virological suppression. These results suggest that in HBV-related hepatocellular carcinoma, patients under antiviral suppression might further benefit from new antivirals, which are designed to reduce cccDNA. ABSTRACT: New antiviral therapies against hepatitis B virus (HBV) focus on the elimination of covalently closed circular DNA (cccDNA). However, traditional cccDNA-specific quantitative PCR (qPCR) has a narrow effective range, hindering a reliable comparison between the levels of biopsy-derived cccDNAs. Collaterally, the prognostic role of cccDNA in HBV-related hepatocellular carcinoma (HCC) cannot be clearly defined. Here, we developed a peptide nucleic acid (PNA)-clamping qPCR method to provide a wider range of specific cccDNA quantification (up to 5 logs of effective range). Extrachromosomal DNA was extracted from para-neoplastic tissues for cccDNA quantification. In total, 350 HBV-related HCC patients were included for an outcome analysis. Without differential pre-dilution, cccDNA levels in para-neoplastic liver tissues were determined, ranging from < 2 × 10(3) to 123.0 × 10(6) copies/gram. The multivariate linear regression analysis showed that cccDNA was independently correlated with the HBV e antigen (p < 0.001) and serum HBV-DNA levels (p = 0.012). The Cox proportional hazard model analysis showed that cccDNA independently predicted overall survival (p = 0.003) and extrahepatic metastasis-free survival (p = 0.001). In virologically suppressed HCC patients, cccDNA still effectively predicted intrahepatic recurrence-free (p = 0.003) and extrahepatic metastasis-free (p = 0.009) survivals. In conclusion, cccDNA independently predicted postoperative extrahepatic metastasis-free survival. MDPI 2021-01-31 /pmc/articles/PMC7867012/ /pubmed/33572617 http://dx.doi.org/10.3390/cancers13030538 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hsu, Chao-Wei
Chu, Yu-De
Lai, Ming-Wei
Lin, Chih-Lang
Liang, Kung-Hao
Lin, Yang-Hsiang
Yeh, Chau-Ting
Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression
title Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression
title_full Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression
title_fullStr Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression
title_full_unstemmed Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression
title_short Hepatitis B Virus Covalently Closed Circular DNA Predicts Postoperative Liver Cancer Metastasis Independent of Virological Suppression
title_sort hepatitis b virus covalently closed circular dna predicts postoperative liver cancer metastasis independent of virological suppression
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7867012/
https://www.ncbi.nlm.nih.gov/pubmed/33572617
http://dx.doi.org/10.3390/cancers13030538
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