Abstract
Juvenile idiopathic arthritis (JIA) is an autoimmune (AI) disease characterized by chronic arthritis in children. Children with JIA have increased prevalence of other AI diseases. Furthermore, relatives of children with JIA have been shown to have an increased prevalence of AI diseases. Our objective was to determine if there were differences in the prevalence of AI diseases among maternal and paternal relatives of children with JIA. Information about AI diseases among all living first- and second-degree relatives was collected by structured interviews with families of 121 simplex JIA families, 23 multiplex JIA families, and 45 control families. Overall, the prevalence of AI diseases was significantly increased among maternal second-degree relatives of cases compared to that of maternal second-degree relatives of controls [14% vs. 4.3%; p < 0.001]. The prevalence of AI diseases among mothers of JIA cases was three times that of fathers [32.3% vs. 11.4%; p < 0.0001]. The prevalence of AI diseases among all maternal second-degree relatives of children with JIA was significantly higher than that of all paternal second-degree relatives [14% vs. 7.9%; p < 0.004]. Although additional paternal effects cannot be excluded, together these results demonstrate that maternal relatives of children with JIA have an increased prevalence of autoimmunity compared to paternal relatives, suggesting that there might be a maternal parent-of-origin effect in JIA.
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This work is supported in part by The National Institute of Arthritis and Musculoskeletal and Skin Diseases (AR50177, AR42218, AR47363, and AR42272), The Arthritis Foundation, The Val A. Browning Charitable Foundation, The Clinical Genetics Research Program, The Primary Children's Medical Center Foundation, and the Children's Health Research Center, Salt Lake City, UT, USA.
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Zeft, A., Shear, E.S., Thompson, S.D. et al. Familial autoimmunity: maternal parent-of-origin effect in juvenile idiopathic arthritis. Clin Rheumatol 27, 241–244 (2008). https://doi.org/10.1007/s10067-007-0778-8
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DOI: https://doi.org/10.1007/s10067-007-0778-8