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Autoreactive cytotoxic cells in rabbits after prolonged immunostimulation
F Galdiero1, C Romano Carratelli, I Nuzzo
1Istituto di Microbiologia, I Facoltà di Medicina e Chirurgia, Università di Napoli, Italy.
FEMS Microbiology Immunology
|July 1, 1992
Summary
Immunizing rabbits with human serum for six months caused weight loss and reduced leukocytes. Autoreactive lymphocytes were identified, capable of damaging labeled cells from the same rabbit.
Area of Science:
- Immunology
- Animal Models
Background:
- Repeated immunization can induce immune responses and physiological changes.
- Understanding autoimmune responses is crucial in immunology.
Purpose of the Study:
- To investigate the effects of prolonged immunization with human serum in rabbits.
- To characterize the lymphocyte populations and their reactivity post-immunization.
Main Methods:
- Rabbits were immunized for six months with varying doses of sterile human serum.
- Physiological parameters like weight and leukocyte counts were monitored.
- Lymphocyte proliferation assays using Concanavalin A (ConA) were performed.
- Chromium-51 (51Cr) release assays were used to detect cell-mediated cytotoxicity.
Main Results:
- Immunization led to significant weight loss and a decrease in leukocyte counts.
- The lymphocyte population responsive to ConA exhibited autoreactivity.
- These autoreactive lymphocytes were capable of inducing 51Cr release from labeled autologous cells.
Conclusions:
- Prolonged immunization with human serum in rabbits induces adverse physiological effects.
- Autoreactive lymphocytes emerge following this immunization protocol.
- These findings suggest a potential link between immunization and the development of autoimmune responses.