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Dendritic cells: The warriors upfront-turned defunct in chronic hepatitis C infection
Meenakshi Sachdeva1, Yogesh K Chawla1, Sunil K Arora1
1Meenakshi Sachdeva, Sunil K Arora, Department of Immunopathology, Post Graduate Institute of Medical Education and Research, Chandigarh 160012, India.
Insights
Hepatitis C virus (HCV) impairs dendritic cell (DC) function, hindering the immune system
Area of Science:
- Immunology
- Virology
- Hepatology
Background:
- Hepatitis C virus (HCV) infection affects over 170 million people globally, leading to chronic disease due to immune system failure.
- Dendritic cells (DCs) are crucial for initiating adaptive immunity by presenting antigens to T cells.
- HCV infection is known to disrupt DC function, impairing the host's antiviral response.
Purpose of the Study:
- To review the interaction between dendritic cells (DCs) and Hepatitis C virus (HCV).
- To elucidate the mechanisms of DC impairment during HCV infection.
- To discuss the impact of impaired DC function on the host immune response and disease prognosis.
Main Methods:
- Literature review of studies on DC function in Hepatitis C virus infection.
- Analysis of molecular mechanisms underlying DC dysfunction in chronic HCV.
- Synthesis of data on the consequences of DC impairment for antiviral immunity.
Main Results:
- HCV dysregulates dendritic cell (DC) activity, reducing their capacity for antigen presentation.
- There are conflicting reports on the extent of DC dysfunction in chronic HCV infection (CHC).
- The precise molecular mechanisms causing DC impairment in CHC remain incompletely understood.
Conclusions:
- Understanding DC dysfunction in HCV is critical for developing improved immunotherapies and predicting patient outcomes.
- Elucidating these mechanisms can guide strategies for better management of chronic Hepatitis C.
- Further research is needed to fully comprehend the molecular basis of DC impairment in HCV infection.
Abstract:
Hepatitis C virus (HCV) infection causes tremendous morbidity and mortality with over 170 million people infected worldwide. HCV gives rise to a sustained, chronic disease in the majority of infected individuals owing to a failure of the host immune system to clear the virus. In general, an adequate immune response is elicited by an efficient antigen presentation by dendritic cells (DCs), the cells that connect innate and adaptive immune system to generate a specific immune response against a pathogen. However, HCV seems to dysregulate the activity of DCs, making them less proficient antigen presenting cells for the optimal stimulation of virus-specific T cells, hence interfering with an optimal anti-viral immune response. There are discordant reports on the functional status of DCs in chronic HCV infection (CHC), from no phenotypic or functional defects to abnormal functions of DCs. Furthermore, the molecular mechanisms behind the impairment of DC function are even so not completely elucidated during CHC. Understanding the mechanisms of immune dysfunction would help in devising strategies for better management of the disease at the immunological level and help to predict the prognosis of the disease in the patients receiving antiviral therapy. In this review, we have discussed the outcomes of the interaction of DCs with HCV and the mechanisms of DC impairment during HCV infection with its adverse effects on the immune response in the infected host.
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