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LRBA deficiency with autoimmunity and early onset chronic erosive polyarthritis

Authors
Type
Published Article
Journal
Clinical Immunology
Publisher
Elsevier BV
Publication Date
Jul 05, 2016
Volume
168
Pages
88–93
Identifiers
DOI: 10.1016/j.clim.2016.03.006
PMID: 27057999
Source
USPC - SET - SVS
License
White

Abstract

LRBA (lipopolysaccharide-responsive and beige-like anchor protein) deficiency associates immune deficiency, lymphoproliferation, and various organ-specific autoimmunity. To date, prevalent symptoms are autoimmune cytopenias and enteropathy, and lymphocytic interstitial lung disease. In 2 siblings from a consanguineous family presenting with early onset polyautoimmunity, we presumed autosomal recessive inheritance and performed whole exome sequencing. We herein report the first case of early-onset, severe, chronic polyarthritis associated with LRBA deficiency. A novel 1bp insertion in the LRBA gene, abolishing protein expression, was identified in this family. Among the 2 brothers homozygous for LRBA mutation, one developed Evans syndrome and deceased at age 8.5 from complications of severe autoimmune thrombocytopenia. His brother, who carried the same homozygous LRBA mutation, early-onset erosive polyarthritis associated with chronic, bilateral, anterior uveitis and early onset type 1 diabetes mellitus. This report widens the clinical spectrum of LRBA deficiency and, in lights of the variable phenotypes described so far, prompts us to screen for this disease in patients with multiple autoimmune symptoms in the family, including severe, erosive, polyarticular juvenile arthritis.

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