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[Immunologic changes in chronic post-transfusion positive hepatitis C and non-A non-B non-C hepatitis]
M Nocito1, J C Erdozain, C Martín-de-Arguila
1Servicio de Gastroenterología, Hospital Ramón y Cajal, Madrid.
Insights
Patients with posttransfusional chronic hepatitis show reduced immunoglobulin production when their lymphocytes are stimulated. This suggests impaired T-B lymphocyte cooperation in hepatitis C and non-A, non-B, non-C infections.
Area of Science:
- Immunology
- Virology
- Hepatology
Context:
- Posttransfusional chronic hepatitis, including hepatitis C (HCV) and non-A, non-B, non-C, presents immunological challenges.
- Understanding immune dysregulation is crucial for managing chronic liver disease.
Purpose:
- To investigate immunological abnormalities in posttransfusional chronic hepatitis by assessing immunoglobulin production.
- To compare spontaneous and mitogen-stimulated immunoglobulin (IgG, IgA, IgM) production by peripheral blood lymphocytes in patients versus healthy controls.
Summary:
- Peripheral blood lymphocytes from chronic hepatitis patients and healthy volunteers were cultured with Pokeweed mitogen.
- While spontaneous immunoglobulin production showed no difference, stimulated production was significantly lower in patients.
- No correlation was found between immunoglobulin levels, histology, or anti-HCV antibody titers in patients.
Impact:
- Results indicate a significant decrease in stimulated immunoglobulin production in chronic hepatitis patients, suggesting impaired T-B lymphocyte cooperation.
- This finding is particularly relevant given that 82.6% of patients tested positive for HCV markers.
- The study highlights potential immune system deficits in chronic posttransfusional hepatitis, informing future therapeutic strategies.
Objectives:
To study some aspects of the immunological abnormalities of C and non-A non-B non-C posttransfusional chronic hepatitis through the spontaneous and mitogen-stimulated "in vitro" production of immunoglobulins by peripheral blood lymphocytes.
Experimental Design:
Peripheral blood lymphocytes from non-A non-B posttransfusional chronic hepatitis patients and from healthy volunteers were cultured in presence and absence of Pokeweed mitogen and the secreted immunoglobulins (IgG, IgA and IgM) were measured by ELISA in the supernatants. The results in both groups were compared.
Patients:
23 posttransfusional chronic hepatitis patients, 11 males and 12 females with an average age of 46.73 +/- 11.2 yrs (range: 24-69 yrs), have been studied. The histological diagnosis was chronic active hepatitis (CAH) in 13 cases, CAH with bridge necrosis in 6 patients and CAH with associated cirrhosis in 4 cases. The control group was composed by 11 healthy volunteers, 5 male and 6 female, with an average age of 38.45 +/- 12.77 yrs (range: 26-65 yrs). No one of the control group was positive for anti-HCV antibodies while in the posttransfusional chronic hepatitis patients group, 19 were positive and 4 negative.
Results:
No significant differences in the spontaneous production of immunoglobulins between both groups has been found, however, when peripheral blood lymphocytes were stimulated with Pokeweed mitogen, a statistically significant lower production of immunoglobulins was observed in chronic hepatitis patients when compared with the control group. In non-A non-B posttransfusional chronic hepatitis patients, no relation has been found between the immunoglobulins production and histological findings or anti-HCV antibody titles.
Conclusions:
In the chronic phase of C and non-A non-B non-C posttransfusional chronic hepatitis, stimulated immunoglobulin production is significantly decreased for each immunoglobulin compared with the control group. These results suggest a failure in T-B lymphocyte cooperation in these infections since 82.6% of our patients were positive for HCV serological markers.
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