Related Experiment Video
Updated: Aug 24, 2026
Murine Model of Epicutaneously-Induced Immunomodulation
Published on: June 24, 2025
Suppressive oligonucleotides protect against collagen-induced arthritis in mice
Li Dong1, Shu-ichi Ito, Ken J Ishii
1CBER/FDA, US Food and Drug Administration, Building 29A, Room 3D10, Bethesda, MD 20892, USA.
Objective:
To examine whether systemic administration of oligonucleotides (ODNs), known to inhibit the production of proinflammatory cytokines, alters host susceptibility to collagen-induced arthritis (CIA), a murine model of rheumatoid arthritis (RA).
Methods:
CIA was induced by injecting DBA/1 mice with type II collagen (CII) in Freund's complete adjuvant, followed 3 weeks later by CII in Freund's incomplete adjuvant. The effect of suppressive ODNs on the incidence and severity of disease was monitored, as were immune correlates of CIA.
Results:
Suppressive ODNs administered during the inductive phase of CIA significantly reduced the incidence and severity of arthritis. Treatment with suppressive ODNs significantly decreased serum titers of pathogenic IgG anti-CII autoantibodies and interferon-gamma production by collagen-reactive T cells.
Conclusion:
Suppressive ODNs may be of therapeutic value in the treatment of RA, and potentially other autoimmune diseases.
Insights
Suppressive oligonucleotides (ODNs) reduced the severity of collagen-induced arthritis (CIA) in mice. This finding suggests ODNs may be a potential therapy for rheumatoid arthritis (RA) and other autoimmune diseases.
Area of Science:
- Immunology
- Rheumatology
- Pharmacology
Background:
- Rheumatoid arthritis (RA) is a chronic autoimmune disease characterized by joint inflammation.
- Collagen-induced arthritis (CIA) in mice serves as a relevant model for studying RA pathogenesis.
- Proinflammatory cytokines play a crucial role in the development and progression of autoimmune arthritis.
Purpose of the Study:
- To investigate the therapeutic potential of systemic administration of suppressive oligonucleotides (ODNs) in collagen-induced arthritis (CIA).
- To determine if ODNs, known to inhibit proinflammatory cytokines, can modulate host susceptibility to CIA.
- To evaluate the impact of ODNs on the incidence and severity of arthritis in a murine model.
Main Methods:
- Collagen-induced arthritis (CIA) was induced in DBA/1 mice using type II collagen (CII) emulsified in Freund's adjuvants.
- Mice received suppressive ODNs during the inductive phase of CIA.
- The incidence and severity of arthritis were monitored, along with immune correlates such as anti-CII autoantibody titers and T cell cytokine production.
Main Results:
- Systemic administration of suppressive ODNs significantly reduced the incidence and severity of CIA.
- Treatment with suppressive ODNs led to decreased serum titers of pathogenic IgG anti-CII autoantibodies.
- ODN treatment also resulted in reduced interferon-gamma production by collagen-reactive T cells.
Conclusions:
- Suppressive ODNs demonstrate therapeutic potential for treating collagen-induced arthritis (CIA).
- These findings suggest that ODNs could be a valuable therapeutic strategy for rheumatoid arthritis (RA).
- ODNs may also hold promise for the treatment of other autoimmune diseases.
