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Original Article
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Volume 360:2438-2444 June 4, 2009 Number 23
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An Autoinflammatory Disease Due to Homozygous Deletion of the IL1RN Locus
Sreelatha Reddy, Ph.D., Shuang Jia, M.S., Rhonda Geoffrey, B.S., Rachel Lorier, B.S., Mariko Suchi, M.D., Ph.D., Ulrich Broeckel, M.D., Martin J. Hessner, Ph.D., and James Verbsky, M.D., Ph.D.

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 by Dinarello, C. A.

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SUMMARY

We describe a patient with an autoinflammatory disease in which the main clinical features are pustular rash, marked osteopenia, lytic bone lesions, respiratory insufficiency, and thrombosis. Genetic studies revealed a 175-kb homozygous deletion at chromosome 2q13, which encompasses several interleukin-1 family members, including the gene encoding the interleukin-1–receptor antagonist (IL1RN). Mononuclear cells, obtained from the patient and cultured, produced large amounts of inflammatory cytokines, with increasing amounts secreted after stimulation with lipopolysaccharide. A similar increase was not observed in peripheral-blood mononuclear cells from a patient with neonatal-onset multisystem inflammatory disorder (NOMID). Treatment with anakinra completely resolved the symptoms and lesions.


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From the Departments of Pediatrics (S.R., S.J., R.G., R.L., U.B., M.J.H., J.V.) and Pathology (M.S.), Medical College of Wisconsin and the Children's Research Institute, Milwaukee.

Address reprint requests to Dr. Verbsky at the Department of Pediatrics, Medical College of Wisconsin and the Children's Research Institute, 9000 W. Wisconsin Ave., Suite C465, Milwaukee, WI 53201, or at jverbsky{at}mcw.edu.

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