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Related Experiment Videos

HCV and lymphoproliferative diseases

G F Santini1, F Giannini, M Crovatto

  • 1Servizio di Microbiologia-Immunologia, Ospedale Civile S. Maria Degli Angeli, Pordenone, Italy.

Clinical and Experimental Rheumatology
|November 1, 1995
PubMed
Summary
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Hepatitis C virus RNA (HCV-RNA) is more frequent in B lymphocytes. Early detection of immunoglobulin gene rearrangement in HCV infection may indicate lymphoproliferative evolution and malignant transformation.

Area of Science:

  • Hepatology
  • Immunology
  • Molecular Biology

Background:

  • Hepatitis C virus (HCV) infection is associated with various extrahepatic manifestations, including B-cell lymphoproliferative disorders.
  • The role of HCV in the pathogenesis of these disorders is not fully understood, but direct or indirect viral effects on B lymphocytes are suspected.

Purpose of the Study:

  • To investigate the presence and forms of HCV-RNA in B lymphocytes.
  • To analyze immunoglobulin gene rearrangement in patients with HCV infection and cryoglobulinemia.
  • To explore the potential of these markers for predicting lymphoproliferative evolution.

Main Methods:

  • HCV-RNA detection in B lymphocytes using reverse transcription-polymerase chain reaction (RT-PCR).
  • HCV genotyping with universal and type-specific primers for the core region.

Related Experiment Videos

  • Detection of immunoglobulin gene rearrangement on cDNA and DNA using RT-PCR and sequencing.

    • Main Results:

    • HCV-RNA was more frequent in B lymphocytes compared to other peripheral blood mononuclear cells (PBMCs).
    • Immunoglobulin monoclonal gene rearrangement was detected in most HCV-positive samples, particularly those with cryoglobulinemia.
    • Analysis on DNA revealed additional positive cases, suggesting clonal selection in HCV-positive, cryoglobulinemia-negative patients.

    Conclusions:

    • Early detection of immunoglobulin gene rearrangement in HCV infection is crucial for identifying potential lymphoproliferative evolution.
    • Combined analysis of immunoglobulin gene rearrangement and PCR product sequencing can elucidate B-lymphocyte clonal selection steps towards malignant transformation.
    • HCV may play a direct or indirect role in the malignant transformation of B lymphocytes.