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Two Methods of Heterokaryon Formation to Discover HCV Restriction Factors
Published on: July 16, 2012
Complete or partial seroreversion in immunocompetent individuals after self-limited HCV infection: consequences for
Jean-Jacques Lefrère1, Robert Girot, François Lefrère
1Laboratory of Hematology, Hospital of Amiens, Paris, France.
Insights
Hepatitis C virus (HCV) infection can lead to antibody disappearance (seroreversion) even in immunocompetent individuals. This finding is crucial for understanding transfusion inquiries and blood donor screening.
Area of Science:
- Immunology
- Virology
- Hepatology
Background:
- Hepatitis C virus (HCV) infection can resolve spontaneously, leading to antibody disappearance (seroreversion).
- The frequency of HCV seroreversion in immunocompetent individuals remains debated.
- Seroreversion has significant implications for blood transfusion safety and donor screening.
Purpose of the Study:
- To investigate the long-term serological evolution of HCV infection in immunocompetent individuals.
- To determine the rate of seroreversion in a cohort of multitransfused patients with resolved HCV infection.
Main Methods:
- A longitudinal study followed 16 immunocompetent, multitransfused patients with confirmed anti-HCV antibodies.
- Patients were monitored over an extended period without antiviral treatment.
- HCV antibody status was assessed using EIA and Recombinant Immunoblot Assay (RIBA).
Main Results:
- 12 patients (75%) remained anti-HCV positive with stable RIBA patterns after a mean follow-up of 7.6 years.
- One patient (6.25%) showed complete seroreversion 6 years post-enrollment.
- Three patients (18.75%) exhibited partial seroreversion over a mean of 16 years.
Conclusions:
- HCV infection does not invariably result in a persistent antibody response, even in immunocompetent hosts.
- The possibility of HCV seroreversion must be considered in transfusion-related investigations.
- Findings highlight the complexity of HCV infection dynamics and serological markers.
Background:
The disappearance of anti-HCV antibodies over time, after a self-limited infection, also referenced seroreversion, has been observed. The frequency of this phenomenon remains controversial, especially in immunocompetent subjects. However, it has important implications in the context of transfusion inquiries, in particular in case of a blood donor suspected to have transmitted HCV through a past blood donation.
Study Design And Methods:
Our findings are presented of a longitudinal study, including 16 patients from a cohort of 78 immunocompetent, multitransfused individuals who were positive for anti-HCV (EIA and confirmatory assay [RIBA]) and followed over a long period of time without having received any antiviral therapy. The aim was to establish whether a past and self-resolved HCV infection could evolve toward a negative serology.
Results:
The 16 patients were classified in three groups: 1) 12 patients who remained anti-HCV positive with no evolution in their RIBA pattern after a mean follow-up of 7.6 years; 2) one patient who presented a complete seroreversion 6 years after enrollment; and 3) three patients with a partial seroreversion over a mean follow-up of 16 years.
Conclusion:
HCV infection is not always characterized by a persistent antibody response, even in immunocompetent individuals. This should be taken into consideration when transfusion inquiries are conducted.
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