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Dendritic cells in hepatitis C infection: can they (help) win the battle?
Angela Dolganiuc1, Gyongyi Szabo
1Department of Medicine, University of Massachusetts Medical School, 364 Plantation Street, LRB-270-H, Worcester, MA 01605, USA. angela.dolganiuc@umassmed.edu
Insights
Hepatitis C virus (HCV) persistence is linked to immune system failure. This review explores how dendritic cells (DCs) impact anti-HCV immunity and potential DC-based cure strategies.
Area of Science:
- Immunology
- Virology
- Hepatology
Background:
- Hepatitis C virus (HCV) infection leads to chronic illness in most patients, increasing risks for liver disease and other health issues.
- Understanding HCV persistence mechanisms is crucial, as they are often tied to the immune system's inability to clear the virus.
- Dendritic cells (DCs) are key immune cells that initiate antiviral responses and maintain immune tolerance.
Purpose of the Study:
- To review the current knowledge on the role of dendritic cells (DCs) in anti-HCV immunity.
- To address key questions regarding DC subsets, HCV infection models, and DC-based therapeutic strategies for HCV.
- To explore the potential of DC-based approaches for managing and curing HCV infection.
Main Methods:
- Review of existing literature on dendritic cells and Hepatitis C virus (HCV) immunity.
- Analysis of data from various in vitro and in vivo models of HCV infection, focusing on DC function.
- Examination of the phenotype and function of different DC subsets in HCV-infected individuals.
Main Results:
- The review synthesizes current findings on DC subsets and their functions in HCV-infected patients.
- It evaluates the utility of various experimental models for studying DC roles in anti-HCV immunity.
- The latest insights into DC-dependent mechanisms of viral clearance and immune tolerance in HCV are presented.
Conclusions:
- Dendritic cells play a critical role in controlling Hepatitis C virus (HCV) infection.
- Further research into DC subsets and their functions can identify effective HCV elimination strategies.
- DC-based therapies hold promise for managing and potentially curing HCV infection.
Abstract:
Infection with hepatitis C virus (HCV) is a public health problem; it establishes a chronic course in ~85% of infected patients and increases their risk for developing liver cirrhosis, hepatocellular carcinoma, and significant extrahepatic manifestations. The mechanisms of HCV persistence remain elusive and are largely related to inefficient clearance of the virus by the host immune system. Dendritic cells (DCs) are the most efficient inducers of immune responses; they are capable of triggering productive immunity and maintaining the state of tolerance to self- and non-self antigens. During the past decade, multiple research groups have focused on DCs, in hopes of unraveling an HCV-specific DC signature or DC-dependent mechanisms of antiviral immunity which would lead to a successful HCV elimination strategy. This review incorporates the latest update in the current status of knowledge on the role of DCs in anti-HCV immunity as it relates to several challenging questions: (a) the phenotype and function of diverse DC subsets in HCV-infected patients; (b) the characteristics of non-human HCV infection models from the DCs' point of view; (c) how can in vitro systems, ranging from HCV protein- or peptide-exposed DC to HCV protein-expressing DCs, and in vivo systems, ranging from HCV protein-expressing transgenic mice to HCV-infected non-human primates, be employed to dissect the role of DCs in triggering/maintaining a robust antiviral response; and (d) the prospect of DC-based strategy for managing and finding a cure for HCV infection.
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