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Generating the antibody repertoire in rabbit
1Department of Microbiology and Immunology, Loyola University Chicago, Maywood, Illinois 60153.
Advances in Immunology
|January 1, 1994
Summary
Rabbits develop a primary antibody repertoire in the gut-associated lymphoid tissue (GALT) through gene conversion and mutation. This process is crucial for immune competence, with GALT acting as the key site for B cell development.
Area of Science:
- Immunology
- Developmental Biology
- Veterinary Science
Background:
- B cell development and antibody repertoire generation are critical for immune competence.
- The specific site and mechanisms of primary antibody repertoire formation in rabbits have not been fully elucidated.
- The gut-associated lymphoid tissue (GALT) in rabbits shares structural similarities with the chicken bursa, a known site for antibody repertoire development.
Purpose of the Study:
- To describe a model for B cell development and antibody repertoire generation in rabbits.
- To identify the primary site of antibody repertoire development in rabbits.
- To elucidate the mechanisms involved in generating the primary antibody repertoire in rabbits.
Main Methods:
- Surgical removal of GALT in neonatal rabbits.
- Study of lymphoid development in germfree rabbits.
- Comparative analysis of GALT follicular development with the chicken bursa.
Main Results:
- Neonatal GALT removal leads to highly immunocompromised rabbits.
- Germfree rabbits exhibit minimal lymphoid development in GALT and are immunoincompetent.
- Rabbit GALT shows follicular development analogous to the chicken bursa.
Conclusions:
- The gut-associated lymphoid tissue (GALT) is the primary site for rabbit B cell development and antibody repertoire generation.
- Somatic gene conversion and somatic mutation are key mechanisms in forming the primary antibody repertoire.
- The primary repertoire, established early in ontogeny, confers immunocompetence, and is later expanded following antigen encounter.