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Interferon-gamma potentiates antibody affinity in mice with a genetically controlled defect in affinity maturation
G P Holland1, N Holland, M W Steward
1Department of Clinical Sciences, London School of Hygiene & Tropical Medicine, England.
Clinical and Experimental Immunology
|November 1, 1990
Summary
Interferon-gamma (IFN-gamma) boosts antibody levels and affinity in mice, unlike tuftsin or IL-1 beta peptides. This suggests IFN-gamma
Area of Science:
- Immunology
- Vaccinology
Background:
- Immunomodulatory agents like Interferon-gamma (IFN-gamma), tuftsin, and an Interleukin-1 beta (IL-1 beta) peptide enhance antibody responses.
- These agents act on macrophages and T cells, improving antibody titres to T cell-dependent antigens.
Purpose of the Study:
- To investigate the ability of these immunomodulatory agents to enhance antibody affinity, not just titre.
- To evaluate their efficacy in mice with impaired antibody affinity maturation (low N/M mice).
Main Methods:
- Low N/M mice were injected with a T cell-dependent antigen simultaneously with either IFN-gamma, tuftsin, or the IL-1 beta peptide.
- Antibody titre and affinity were measured to assess the effects of each agent.
Main Results:
- All tested agents (IFN-gamma, tuftsin, IL-1 beta peptide) potentiated antibody levels.
- Only IFN-gamma demonstrated the ability to enhance antibody affinity in low N/M mice.
Conclusions:
- IFN-gamma enhances both antibody titre and affinity, suggesting its potential as a vaccine adjuvant.
- Tuftsin and the IL-1 beta peptide primarily affect antibody levels, not affinity, in this model.