The Impact of Rheumatoid Arthritis on First Nations and How We Can Work With Communities to Prevent It

Area of Science:

• Immunology and Genetics
• Public Health and Epidemiology
• Nutritional Science

Background:

• Rheumatoid arthritis (RA) disproportionately affects Indigenous North American First Nations (FN), presenting with severe, disabling, and often fatal outcomes.
• Genetic predisposition, including specific HLA-DRB1 alleles, combined with environmental factors like smoking and periodontal disease, significantly increases RA risk in FN populations.
• Understanding preclinical RA stages is crucial for developing effective prevention strategies in high-risk FN communities.

Purpose of the Study:

• To investigate preclinical rheumatoid arthritis (RA) development in First Nations (FN) populations.
• To identify anticitrullinated protein antibodies (ACPA) and proteomic biomarkers as predictors of RA.
• To evaluate the efficacy of nutritional supplements (curcumin, omega-3, vitamin D) for RA prevention in ACPA-positive individuals.

Main Methods:

• Prospective follow-up of first-degree relatives of FN patients with RA.
• Screening of FN communities using dried blood spot technology for ACPA detection.
• Enrollment of ACPA-positive individuals in intervention studies using a combination of curcumin, omega-3, and vitamin D supplements.

Main Results:

• Focus on specific ACPA and proteomic biomarkers as early predictors of RA development.
• Identification of a potential intervention window before irreversible autoimmunity.
• Studies are guided by shared decision-making principles, respecting community autonomy.

Conclusions:

• A gene-environment interaction model explains high RA risk in FN communities.
• Early detection of ACPA via dried blood spots enables targeted prevention efforts.
• Nutritional supplement interventions show promise for preventing RA in high-risk individuals.