Arthritis Rheumatol. 2023 Dec 10. doi: 10.1002/art.42766. Online ahead of print.
ABSTRACT
OBJECTIVE: Systemic lupus erythematosus (SLE) is an autoimmune disease resulting in debilitating clinical manifestations that vary in severity by race and ethnicity with a disproportionate burden in African American, Mestizo, and Asian populations compared to populations of European descent. Differences in global and local genetic ancestry may shed light on the underlying mechanisms contributing to these disparities, including increased prevalence of lupus nephritis, younger age of symptom onset, and presence of autoantibodies.
METHODS: A total of 1,139 SLE European, African American, and Mestizos patients were genotyped using the Affymetrix LAT1 World array. Global ancestry proportions were estimated using ADMIXTURE and local ancestry was estimated using RFMIXv2.0. We investigated associations between lupus nephritis, age of onset, and autoantibody status with both global and local ancestry proportions within the MHC region.
RESULTS: Our results showed small effect sizes that did not meet the threshold for statistical significance for global or local ancestry proportions in either African American or Mestizo SLE patients who presented with the clinical manifestations of interest compared to those who did not.
CONCLUSION: These findings suggest that local genetic ancestry within the MHC region is not a major contributor to these SLE manifestations among patients with SLE from admixed populations. This article is protected by copyright. All rights reserved.
PMID:38073021 | DOI:10.1002/art.42766
