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Collagen-induced arthritis in common marmosets: a new nonhuman primate model for chronic arthritis
Michel P M Vierboom1, Elia Breedveld, Ivanela Kondova
1Department of Immunobiology, Biomedical Primate Research Centre, Lange Kleiweg 161, 2288 GJ Rijswijk, The Netherlands. vierboom@bprc.nl
Introduction:
There is an ever-increasing need for animal models to evaluate efficacy and safety of new therapeutics in the field of rheumatoid arthritis (RA). Particularly for the early preclinical evaluation of human-specific biologicals targeting the progressive phase of the disease, there is a need for relevant animal models. In response to this requirement we set out to develop a model of collagen-induced arthritis (CIA) in a small-sized nonhuman primate species (300 to 400 g at adult age); that is, the common marmoset (Callithrix jacchus).
Methods:
Twenty-two animals divided into three experiments were immunized with collagen type II (CII) of either bovine or chicken origin with different immunization strategies. The animals were analyzed for clinical manifestation of arthritis, hematology and clinical chemistry, immunological responses against CII and histopathological features of the arthritis.
Results:
Clinically manifest arthritis was observed in almost 100% (21 out of 22) of the animals. Fifty percent of the animals developed semi-acute CIA while the other 50% displayed a more chronic disease. Both cellular (CD3/CD4 and CD3/CD8) and humoral responses (IgM and IgG) against CII were involved in the development of the disease. Besides mild histopathological changes in bone and cartilage, severe inflammation in extraarticular tissues like periosteum and subcutaneous tissues was observed.
Conclusions:
This new model in marmosets more closely resembles chronic RA with respect to the chronic disease course and pathomorphological presentation than the more acute monophasic and destructive CIA model in macaques. This model can therefore fill a niche in preclinical testing of new human specific therapeutics.
Insights
A new collagen-induced arthritis (CIA) model using marmosets closely mimics chronic rheumatoid arthritis (RA). This primate model is valuable for preclinical testing of novel human-specific RA therapeutics.
Area of Science:
- Primate models
- Rheumatoid arthritis research
- Preclinical drug development
Background:
- Growing need for animal models to assess rheumatoid arthritis (RA) therapeutics.
- Requirement for models reflecting the progressive phase of RA, especially for human-specific biologics.
- Development of a collagen-induced arthritis (CIA) model in common marmosets (Callithrix jacchus).
Purpose of the Study:
- To establish a novel collagen-induced arthritis (CIA) model in common marmosets.
- To evaluate the suitability of this model for preclinical assessment of RA therapeutics.
- To characterize the clinical, immunological, and histopathological features of CIA in marmosets.
Main Methods:
- Twenty-two marmosets were immunized with collagen type II (CII) using varied strategies.
- Animals were monitored for clinical signs of arthritis, and immunological responses (cellular and humoral) to CII were assessed.
- Hematology, clinical chemistry, and histopathological analyses were performed.
Main Results:
- Arthritis developed in 95% (21/22) of marmosets, with 50% exhibiting semi-acute and 50% chronic disease.
- Both cellular (CD3/CD4, CD3/CD8) and humoral (IgM, IgG) immune responses against CII were implicated.
- Histopathology revealed severe inflammation in extra-articular tissues, alongside mild bone and cartilage changes.
Conclusions:
- The marmoset CIA model closely resembles chronic RA in its disease course and pathology.
- This model offers a valuable alternative to existing primate models, particularly for evaluating human-specific RA drugs.
- The model fills a critical gap in preclinical research for progressive RA therapeutics.
