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HLA Class I (A and B) Allele Polymorphism in a Moroccan Population Infected with Hepatitis C Virus
Safa Machraoui1,2,3, Abdelmalek Hakmaoui1, Khaoula Errafii3
1Laboratory of Immunology and Human Leukocyte Antigen, Center of Clinical Research, Mohammed VI University Hospital, Marrakech 40080, Morocco.
Insights
Human leukocyte antigen (HLA) gene variations influence Hepatitis C virus (HCV) infection outcomes. Specific HLA-A and HLA-B alleles show associations with HCV susceptibility and clearance, offering insights into disease progression.
Area of Science:
- Immunogenetics
- Virology
- Hepatology
Background:
- Hepatitis C virus (HCV) infection poses a global health challenge, with disease course influenced by viral factors and host immune responses.
- Host immunogenetics, particularly human leukocyte antigens (HLAs), play a crucial role in determining HCV infection outcomes, varying across populations.
- Understanding the association between specific HLA alleles and HCV infection is vital for disease susceptibility and clearance insights.
Purpose of the Study:
- To investigate the relationship between HLA-A and HLA-B allele polymorphism and the clinical outcome of Hepatitis C virus infection.
- To elucidate the impact of immunogenetic factors on HCV susceptibility and viral clearance.
- To enhance understanding of disease pathogenesis and identify potential targeted interventions.
Main Methods:
- A cross-sectional, comparative study involving 40 HCV patients and 100 healthy controls from southern Morocco.
- High-resolution PCR-SSO method used for HLA class I allele typing.
- Statistical analysis to compare allele prevalence between patient and control groups.
Main Results:
- Significant differences in the prevalence of specific HLA class I alleles were observed between HCV-infected individuals and healthy controls.
- HLA-A*02:01 was less prevalent in chronic HCV infection, suggesting a potential protective effect (p = 0.002).
- Increased prevalence of HLA-A*68:02, A*66:01, B*15:03, B*41:02, B*44:03, and B*50:01 alleles in patients indicated potential predisposing factors.
Conclusions:
- The study supports the association of specific immunogenetic markers (HLA alleles) with HCV infection.
- These HLA alleles may play a role in determining clinical manifestations, genotype distribution, and overall outcomes of HCV infection.
- Further analysis of these alleles can deepen the understanding of HCV pathogenesis and inform targeted therapeutic strategies.
Abstract:
Hepatitis C virus (HCV) infection is one of the major health burdens worldwide. Its course depends on the virus itself and the host's immune responses. The latter are conditioned by immunogenetic factors, in particular human leukocyte antigens (HLAs), whose role in determining the outcome of infection varies according to populations and ethnic groups. The current study attempted to investigate the possible relationship between HLA-A and HLA-B allele polymorphism and its impacts on the clinical outcome of HCV for a better understanding of disease susceptibility and clearance. A cross-sectional and comparative study was carried out on 40 patients with hepatitis C and 100 ethnically matched healthy control subjects originating from southern Morocco. HLA class I alleles were typed using the high-resolution PCR-SSO method. The prevalence of certain HLA class I alleles differed significantly between HCV-infected individuals and healthy controls. In particular, HLA-A*02:01 was less prevalent in chronic HCV infection (p = 0.002), indicating a potential protective effect, while the higher prevalence of HLA-A*68:02, A*66:01 B*15:03, B*41:02, B*44:03, and B*50:01 in patients could indicate a predisposing factor. These findings support the association of these immunogenetic markers with HCV infection, indicating their possible role in determining clinical and genotype forms as well as the outcome of HCV infection. Thus, an in-depth analysis of these alleles could lead to a better understanding of HCV pathogenesis and potential targeted interventions.
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