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Carrier-induced tolerance to nucleic acid antigens
Journal of Immunology (Baltimore, Md. : 1950)
|October 1, 1975
Summary
Multiple doses of nucleosides-IgG1 tolerogen effectively suppressed anti-nucleoside responses in mice. This immune tolerance may offer therapeutic benefits for systemic lupus erythematosus management.
Area of Science:
- Immunology
- Autoimmunity
- Tolerance Induction
Background:
- Anti-nucleic acid antibodies are implicated in autoimmune diseases like systemic lupus erythematosus (SLE).
- Developing strategies to induce immune tolerance is crucial for managing autoimmune conditions.
Purpose of the Study:
- To investigate the efficacy of nucleosides-IgG1 as a tolerogen in suppressing anti-nucleoside antibody responses.
- To evaluate the impact of tolerogen administration timing and dosage on immune suppression.
Main Methods:
- BALB/c and SJL mice were treated with nucleosides-IgG1 tolerogen before primary or secondary immunization with nucleosides-keyhole limpet hemocyanin (KLH).
- Nucleoside-specific antibody responses were measured using a modified Farr assay with radiolabeled antigens (denatured DNA or BSA).
- Hapten inhibition experiments assessed antibody specificity.
Main Results:
- Multiple doses of nucleosides-IgG1 effectively suppressed secondary and tertiary anti-nucleoside responses.
- The tolerogen did not affect responses to unrelated antigens.
- Partial suppression led to altered antibody specificity, with a shift towards guanosine recognition in SJL mice.
Conclusions:
- Nucleosides-IgG1 is an effective tolerogen for suppressing anti-nucleoside antibody production.
- The findings suggest potential therapeutic applications for inducing immune tolerance in SLE.