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Constancy of cross reactivity patterns during the anti-HL-A response
Transplantation
|December 1, 1975
Summary
Cross-reacting anti-human leukocyte antigen (anti-HLA) antibody responses appear fixed early after immunization. Subsequent exposures do not significantly alter the antibody specificity pattern, suggesting a stable immune response.
Area of Science:
- Immunology
- Transplantation immunology
Background:
- Understanding antibody responses is crucial for transplantation success.
- Human leukocyte antigen (HLA) compatibility is key in organ and blood transfusions.
Purpose of the Study:
- To investigate the stability of anti-HLA antibody specificities over time.
- To determine if secondary immune stimulation alters established antibody cross-reactivity patterns.
Main Methods:
- Longitudinal follow-up of patients after three immunizations.
- Antiserum specificity determination using a selected cell panel.
- Antibody titration against cells with varying cross-reactivity.
- Extensive absorption studies of antisera.
Main Results:
- Cross-reactivity patterns were established early in the immune response.
- Antibody specificities showed limited variation over one year or more.
- Secondary stimulation did not significantly change the established cross-reactivity.
Conclusions:
- The immune response generating cross-reacting anti-HLA antibodies is largely predetermined early on.
- Established antibody specificity patterns are remarkably stable and resistant to change, even with repeated antigen exposure.