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[Function of dendritic cell in chronic hepatitis C patients]
Xiaoguang Li1, Shulan Lu, Guiqiang Wang
1Department of Infetious Disease, The Second Affiliated Hospital, Harbin Medical University, Harbin 150086, China. lixg75@0451.com
Insights
Dendritic cells (DCs) play a crucial role in immune response. In chronic hepatitis C (HCV) infection, DC function is impaired, contributing to viral persistence.
Area of Science:
- Immunology
- Virology
- Cell Biology
Context:
- Chronic hepatitis C (HCV) is a significant global health concern.
- Hepatitis C virus (HCV) persistence is a hallmark of chronic infection.
- Dendritic cells (DCs) are critical antigen-presenting cells that bridge innate and adaptive immunity.
Purpose:
- To investigate the functional status of dendritic cells (DCs) in patients with chronic hepatitis C (HCV) infection.
- To explore the relationship between DC function and HCV persistence.
Summary:
- Mononuclear cells were isolated and differentiated into DCs.
- HCV-infected DCs exhibited reduced expression of CD86, impaired T-cell proliferation capacity, and lower levels of IL-12 and IFN-gamma compared to normal DCs.
- These findings indicate a functional deficit in DCs during chronic HCV infection.
Impact:
- The impaired function of dendritic cells (DCs) in chronic hepatitis C (HCV) may contribute to the virus's persistence.
- Understanding DC dysfunction offers potential targets for therapeutic interventions to combat HCV infection.
Objective:
To explore the relation between dendritic cell (DC) and the persistence of HCV in chronic hepatitis C.
Methods:
The mononuclear cells were separated from the peripheral blood and cultured with the AIM-V serum-free culture to induce DC. The shape and the ultrastructure of DC, the phenotype of DC, the capacity of DC to induce allogeneicly naive T cell proliferation and the level of cytokines in supernant were investigated.
Results:
The expression rate of CD(86) in HCV-DC was (52.4 +/- 13.3)%, which was obviously lower than that of normal-DC [(83.7 +/- 15.8)%, P < 0.01]; The capacity of proliferation of HCV-DC to induce allogeneic T cell (cpm: 19 245 +/- 2 788) was obviously lower than that of the normal-DC (cpm: 26 529 +/- 3 218) (P < 0.01); In mixed lymphocyte reaction, the average of IL-12 p(40) and interferon (IFN)gamma in HCV-DC was (404 +/- 103) ng/L and (7 891 +/- 821) ng/L, which was obviously lower than (802 +/- 205) ng/L and (13 490 +/- 1 554) ng/L of the normal-DC (P < 0.005).
Conclusion:
The function of DC in patients with chronic hepatitis C is decreased, suggesting that it is related to the persistent infection of HCV.