Impact of genetic ancestry and sociodemographic status on the clinical expression of systemic lupus erythematosus in American Indian-European populations

Elena Sánchez, Astrid Rasmussen, Laura Riba, Eduardo Acevedo-Vasquez, Jennifer A Kelly, Carl D Langefeld, Adrianne H Williams, Julie T Ziegler, Mary E Comeau, Miranda C Marion, Ignacio García-De La Torre, Marco A Maradiaga-Ceceña, Mario H Cardiel, Jorge A Esquivel-Valerio, Jacqueline Rodriguez-Amado, José Francisco Moctezuma, Pedro Miranda, Carlos E Perandones, Cecilia Castel, Hugo A Laborde, Paula Alba, Jorge L Musuruana, I Annelise Goecke, Juan-Manuel Anaya, Kenneth M Kaufman, Adam Adler, Stuart B Glenn, Elizabeth E Brown, Graciela S Alarcón, Robert P Kimberly, Jeffrey C Edberg, Luis M Vilá, Lindsey A Criswell, Gary S Gilkeson, Timothy B Niewold, Javier Martín, Timothy J Vyse, Susan A Boackle, Rosalind Ramsey-Goldman, R Hal Scofield, Michelle Petri, Joan T Merrill, John D Reveille, Betty P Tsao, Lorena Orozco, Vicente Baca, Kathy L Moser, Patrick M Gaffney, Judith A James, John B Harley, Teresa Tusié-Luna, Bernardo A Pons-Estel, Chaim O Jacob, Marta E Alarcón-Riquelme
Arthritis and Rheumatism 2012, 64 (11): 3687-94

OBJECTIVE: American Indian-Europeans, Asians, and African Americans have an excess morbidity from systemic lupus erythematosus (SLE) and a higher prevalence of lupus nephritis than do Caucasians. The aim of this study was to analyze the relationship between genetic ancestry and sociodemographic characteristics and clinical features in a large cohort of American Indian-European SLE patients.

METHODS: A total of 2,116 SLE patients of American Indian-European origin and 4,001 SLE patients of European descent for whom we had clinical data were included in the study. Genotyping of 253 continental ancestry-informative markers was performed on the Illumina platform. Structure and Admixture software were used to determine genetic ancestry proportions of each individual. Logistic regression was used to test the association between genetic ancestry and sociodemographic and clinical characteristics. Odds ratios (ORs) were calculated with 95% confidence intervals (95% CIs).

RESULTS: The average American Indian genetic ancestry of 2,116 SLE patients was 40.7%. American Indian genetic ancestry conferred increased risks of renal involvement (P < 0.0001, OR 3.50 [95% CI 2.63- 4.63]) and early age at onset (P < 0.0001). American Indian ancestry protected against photosensitivity (P < 0.0001, OR 0.58 [95% CI 0.44-0.76]), oral ulcers (P < 0.0001, OR 0.55 [95% CI 0.42-0.72]), and serositis (P < 0.0001, OR 0.56 [95% CI 0.41-0.75]) after adjustment for age, sex, and age at onset. However, age and sex had stronger effects than genetic ancestry on malar rash, discoid rash, arthritis, and neurologic involvement.

CONCLUSION: In general, American Indian genetic ancestry correlates with lower sociodemographic status and increases the risk of developing renal involvement and SLE at an earlier age.

Full Text Links

Find Full Text Links for this Article


You are not logged in. Sign Up or Log In to join the discussion.

Related Papers

Available on the App Store

Available on the Play Store
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"