title: Phenotyping of intrahepatic and peripheral blood lymphocytes in patients with chronic hepatitis C.
abstract: The host immune responses have been suggested to play a role in liver injury occurring in patients with chronic hepatitis C. In order to explore the relationship between the relative proportions of intrahepatic and peripheral blood lymphocytes (IHL, PBL), the levels of viremia, and the histological hepatitis activity score, three-color fluorescence-activated cytometric analysis was performed for 36 patients with chronic hepatitis C and six control subjects without chronic hepatitis. The liver biopsy was performed before any antiviral therapy. Each liver specimen was divided into two parts: one for histological examination and one for immunological analysis. Tricolor CD45 was used to improve "lymphogating." Fluorescein isothiocyanate- or phycoerythrin-conjugated monoclonal antibodies with specificity for CD3, CD4, CD8, and CD20 (lymphocyte subpopulations), for CD69 (activated lymphocytes), and for CD16/56 (natural killer cells) were used. The livers of patients with chronic hepatitis C contained a greater proportion of CD4+ lymphocytes that exhibited marked expression of CD69 than in control subjects (20.7 +/- 7.3% vs 10.2 +/- 4.6%, P = 0.027). Moreover, in patients with chronic hepatitis C, the proportion of CD4+ IHL correlated with the histological hepatitis activity evaluated by the Knodell score (r = 0.48, P = 0.004). No correlation was found between the percentage of CD4+ IHL and the level of viremia or transaminase activities. Our findings clearly indicate that a cellular immune response does take place in HCV-infected livers and could thus contribute to the outcome of hepatitis C virus infection.
authors.affiliation: Department of Immunology, INSERM U343, Archet Hospital, Nice, France.
authors.forename: A
authors.initials: A
authors.lastname: Tran
authors.forename: G
authors.initials: G
authors.lastname: Yang
authors.forename: A
authors.initials: A
authors.lastname: Doglio
authors.forename: M
authors.initials: M
authors.lastname: Ticchioni
authors.forename: C
authors.initials: C
authors.lastname: Laffont
authors.forename: J
authors.initials: J
authors.lastname: Durant
authors.forename: J L
authors.initials: JL
authors.lastname: Bernard
authors.forename: J
authors.initials: J
authors.lastname: Gugenheim
authors.forename: M C
authors.initials: MC
authors.lastname: Saint-Paul
authors.forename: A
authors.initials: A
authors.lastname: Bernard
authors.forename: P
authors.initials: P
authors.lastname: Rampal
authors.forename: S
authors.initials: S
authors.lastname: Benzaken
mesh_terms: D000328:Adult; D000368:Aged; D017252:CD3 Complex / Q000032:analysis; D015704:CD4 Antigens / Q000032:analysis; D019002:CD56 Antigen / Q000032:analysis; D016827:CD8 Antigens / Q000032:analysis; D005260:Female; D005434:Flow Cytometry; D019698:Hepatitis C, Chronic / Q000276:immunology* / Q000473:pathology / Q000821:virology; D006801:Humans; D007694:Killer Cells, Natural; D008213:Lymphocyte Activation; D016131:Lymphocyte Subsets / Q000276:immunology*; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D017452:Receptors, IgG / Q000032:analysis; D000637:Transaminases / Q000097:blood
chemical_list: D017252:CD3 Complex; D015704:CD4 Antigens; D019002:CD56 Antigen; D016827:CD8 Antigens; D017452:Receptors, IgG; D000637:Transaminases