Immune-mediated effects targeting hepatitis C virus in a syngeneic replicon cell transplantation mouse model
Objective: HCV is characterised by its ability to establish chronic infection in hepatocytes and to replicate in the presence of an inflammation. We mimicked this situation in vivo in immune-competent mice by syngeneic transplantation of HCV replicon-containing mouse hepatoma cells. Design: A total...
Gespeichert in:
| Hauptverfasser: | , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2018
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| In: |
Gut
Year: 2017, Jahrgang: 67, Heft: 8, Pages: 1525-1535 |
| ISSN: | 1468-3288 |
| DOI: | 10.1136/gutjnl-2016-313579 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1136/gutjnl-2016-313579 Verlag, kostenfrei, Volltext: https://gut.bmj.com/content/67/8/1525 
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| Verfasserangaben: | Sepideh Levander, Fredrik Holmström, Lars Frelin, Gustaf Ahlén, Daniel Rupp, Gang Long, Ralf Bartenschlager, Matti Sällberg |
MARC
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| 245 | 1 | 0 | |a Immune-mediated effects targeting hepatitis C virus in a syngeneic replicon cell transplantation mouse model |c Sepideh Levander, Fredrik Holmström, Lars Frelin, Gustaf Ahlén, Daniel Rupp, Gang Long, Ralf Bartenschlager, Matti Sällberg |
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| 520 | |a Objective: HCV is characterised by its ability to establish chronic infection in hepatocytes and to replicate in the presence of an inflammation. We mimicked this situation in vivo in immune-competent mice by syngeneic transplantation of HCV replicon-containing mouse hepatoma cells. Design: A total of 5 million H-2b positive Hep56.1D cells, carrying a subgenomic genotype (gt) 2a replicon (HCV replicon cells) or stably expressing comparable levels of the HCV NS3/4A protease/helicase complex (NS3/4A hepatoma cells), were injected subcutaneously into syngeneic H-2b-restricted mice. Kinetics of tumour growth, HCV RNA replication levels and HCV-specific immune responses were monitored. For immune monitoring, new H-2b-restricted cytotoxic T cell epitopes within the gt2a NS3/4A region were mapped. Immune mice were generated by DNA-based vaccination. Results: HCV replicon and NS3/4A hepatoma cells generated solid tumours in vivo. Similar to what is seen in human HCV infection did HCV RNA replicate in the presence of inflammation. NS3/4A-specific CD8+ T cells seemed to transiently reduce HCV RNA levels. Both CD4+ and CD8+ T cells were required for protection against tumour growth. Vaccine-induced NS3/4A(gt2a)-specific T cells protected against HCV replicon tumours in wild-type, but not in HCV NS3/4A(gt1a)-transgenic mice with dysfunctional HCV-specific T cells. Importantly, as in human HCV infection, HCV replicon cells neither primed nor boosted a strong NS3/4A-specific T cell response. Conclusion: Syngeneic transplantation of mouse HCV replicon cells into immune-competent animals mirrors many in vivo events in humans. This system is versatile and can be applied to any genetically modified H-2b-restricted mouse strain. | ||
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