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A polymeric IgA response in serum can be produced by parenteral immunization
F Mascart-Lemone1, J Duchateau, M E Conley
1Department of Immunology, Hôpital Universitaire Saint-Pierre, Brussels, Belgium.
Immunology
|August 1, 1987
Summary
Parenteral tetanus toxoid (TT) vaccination in previously boosted individuals rapidly elicits serum polymeric (p-) and monomeric (m-) IgA antibody responses. While p-IgA is transient, m-IgA persists, suggesting local IgA synthesis in some cases.
Area of Science:
- Immunology
- Vaccinology
Background:
- Serum IgA antibody responses following parenteral immunization are not fully characterized.
- Understanding IgA kinetics is crucial for vaccine development and immune response assessment.
Purpose of the Study:
- To analyze the magnitude and kinetics of serum polymeric (p-) and monomeric (m-) IgA antibody responses after parenteral tetanus toxoid (TT) vaccination in previously boosted individuals.
- To investigate the potential for local IgA synthesis.
Main Methods:
- Ten volunteers, previously boosted 5-20 years prior, received parenteral TT vaccine.
- Serum samples were analyzed for m-IgA and p-IgA antibody levels and kinetics.
- Salivary IgA and albumin excretion were measured in one subject.
Main Results:
- A rapid, marked serum IgA response (m-IgA and p-IgA) peaked around 11 days, preceding the IgG peak.
- At peak IgA response, p-IgA constituted approximately 54% of anti-TT activity.
- p-IgA antibodies were transient, disappearing within weeks, while m-IgA persisted.
- Anti-TT IgA detected in saliva suggested local synthesis in one individual.
Conclusions:
- Parenteral immunization in primed individuals can induce a serum polymeric IgA response.
- The findings raise questions about the mechanisms controlling polymeric versus monomeric IgA production.
- Further research is needed to elucidate the regulation of IgA subclass responses.