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The spectrum of autoantibodies in IPEX syndrome is broad and includes anti-mitochondrial autoantibodies.

Abstract：

:IPEX syndrome is a congenital disorder of immune regulation caused by mutations in the FOXP3 gene, which is required for the suppressive function of naturally arising CD4 + CD25 + regulatory T cells. In this case series we evaluated serum samples from 12 patients with IPEX syndrome for the presence of common autoantibodies associated with a broad range of autoimmune disorders. We note that 75% of patients (9/12) had 1 or more autoantibodies, an incidence far above the cumulative rate observed in the general population. The range of autoantibodies differed between patients and there was no predominant autoantibody or pattern of autoantibodies present in this cohort. Surprisingly, one patient had high-titer anti-mitochondrial antibodies (AMA) typically associated with primary biliary cirrhosis (PBC) although the patient had no signs of cholestasis. PBC is a well-characterized autoimmune disease that occurs primarily in women and includes the serological hallmarks of serum AMA and elevated IgM which were both present in this patient. PBC is virtually absent in children with the exception of one reported child with interleukin 2 receptor α (CD25) deficiency which is associated with an IPEX-like regulatory T cell dysfunction. Based on the present data and the available literature we suggest a direct role for CD4 + CD25 + regulatory T cells in restraining B cell autoantibody production and that defects in regulatory T cells may be crucial to the development of PBC.

journal_name

J Autoimmun

journal_title

Journal of autoimmunity

authors

Tsuda M,Torgerson TR,Selmi C,Gambineri E,Carneiro-Sampaio M,Mannurita SC,Leung PS,Norman GL,Gershwin ME

doi

10.1016/j.jaut.2010.06.017

subject

Has Abstract

pub_date

2010-11-01 00:00:00

pages

265-8

issue

3

eissn

0896-8411

issn

1095-9157

pii

S0896-8411(10)00072-7

journal_volume

35

pub_type

杂志文章

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