IFN-α confers epigenetic regulation of HBV cccDNA minichromosome by modulating GCN5-mediated succinylation of histone H3K79 to clear HBV cccDNA
| العنوان: | IFN-α confers epigenetic regulation of HBV cccDNA minichromosome by modulating GCN5-mediated succinylation of histone H3K79 to clear HBV cccDNA |
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| المؤلفون: | Xiaodong Zhang, Huihui Zhang, Zixian Liu, Lei Liu, Hongfeng Yuan, Yufei Wang, Ying Yuan, Lina Zhao, Man Zhao, Haolin Yun, Guang Yang, Yu Geng, Jiapei Wang |
| المصدر: | Clinical Epigenetics |
| بيانات النشر: | BioMed Central, 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | 0301 basic medicine, Male, Hepatitis B virus, HBV cccDNA minichromosome, medicine.disease_cause, Cell Line, Epigenesis, Genetic, Epigenetic regulation, Histones, 03 medical and health sciences, Succinylation, Mice, 0302 clinical medicine, Minichromosome, Transcription (biology), Genetics, medicine, HBV, Animals, Humans, Epigenetics, Hepatitis B e Antigens, Molecular Biology, Genetics (clinical), Histone Acetyltransferases, Hepatitis B Surface Antigens, biology, Research, Histone succinylation, Interferon-alpha, virus diseases, cccDNA, digestive system diseases, Cell biology, Blotting, Southern, enzymes and coenzymes (carbohydrates), 030104 developmental biology, Histone, Models, Animal, Succinyltransferase activity, biology.protein, 030211 gastroenterology & hepatology, Female, Developmental Biology, Interferon-α, GCN5 |
| الوصف: | Background Hepatitis B virus covalently closed circular DNA (HBV cccDNA) is assembled by histones and non-histones into a chromatin-like cccDNA minichromosome in the nucleus. The cellular histone acetyltransferase GCN5, displaying succinyltransferase activity, is recruited onto cccDNA to modulate HBV transcription in cells. Clinically, IFN-α is able to repress cccDNA. However, the underlying mechanism of IFN-α in the depression of cccDNA mediated by GCN5 is poorly understood. Here, we explored the effect of IFN-α on GCN5-mediated succinylation in the epigenetic regulation of HBV cccDNA minichromosome. Results Succinylation modification of the cccDNA minichromosome has been observed in HBV-infected human liver-chimeric mice and HBV-expressing cell lines. Moreover, histone H3K79 succinylation by GCN5 was identified in the system. Interestingly, the mutant of histone H3K79 efficiently blocked the replication of HBV, and interference with GCN5 resulted in decreased levels of HBV DNA, HBsAg, and HBeAg in the supernatant from de novo HBV-infected HepaRG cells. Consistently, the levels of histone H3K79 succinylation were significantly elevated in the livers of HBV-infected human liver-chimeric mice. The knockdown or overexpression of GCN5 or the mutant of GCN5 could affect the binding of GCN5 to cccDNA or H3K79 succinylation, leading to a change in cccDNA transcription activity. In addition, Southern blot analysis validated that siGCN5 decreased the levels of cccDNA in the cells, suggesting that GCN5-mediated succinylation of histone H3K79 contributes to the epigenetic regulation of cccDNA minichromosome. Strikingly, IFN-α effectively depressed histone H3K79 succinylation in HBV cccDNA minichromosome in de novo HepG2-NTCP and HBV-infected HepaRG cells. Conclusions IFN-α epigenetically regulates the HBV cccDNA minichromosome by modulating GCN5-mediated succinylation of histone H3K79 to clear HBV cccDNA. Our findings provide new insights into the mechanism by which IFN-α modulate the epigenetic regulation of HBV cccDNA minichromosome. |
| اللغة: | English |
| تدمد: | 1868-7083 1868-7075 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccdd326004383bafbe397d640ff43e00Test http://europepmc.org/articles/PMC7487718Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....ccdd326004383bafbe397d640ff43e00 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 18687083 18687075 |
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