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Inflammatory bowel disease is a group of chronic disorders marked by recurrent inflammation of the gastrointestinal tract due to an abnormal immune response against gut microflora. This leads to tissue damage. The two main forms are Crohn’s disease and ulcerative colitis.Crohn’s DiseaseCrohn’s disease is a relapsing inflammatory disorder that can affect any part of the GI tract, from the mouth to the anus. It involves all layers of the bowel wall (transmural) and shows “skip lesions” in which...
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Published on: January 19, 2024

IgA deficiency: what is new?

Ning Wang1, Lennart Hammarström

  • 1Division of Clinical Immunology, Department of Laboratory Medicine, Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden.

Current Opinion in Allergy and Clinical Immunology
|October 3, 2012
PubMed
Summary
This summary is machine-generated.

Immunoglobulin A deficiency (IgAD) is a polygenic disorder influenced by both MHC and non-MHC genes. Recent research highlights its overlap with autoimmune diseases, suggesting shared genetic and pathophysiological mechanisms.

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Area of Science:

  • Immunology
  • Genetics
  • Autoimmunity

Background:

  • Immunoglobulin A deficiency (IgAD) is the most common primary immunodeficiency in Western populations.
  • Its prevalence is approximately 1:600 in the general population.

Purpose of the Study:

  • To review recent publications on the clinical and genetic aspects of IgA deficiency.
  • To summarize current understanding of IgAD's genetic underpinnings and disease mechanisms.

Main Methods:

  • Literature review of recent publications on IgAD.
  • Analysis of genetic associations and pathophysiological mechanisms.

Main Results:

  • Susceptibility to IgAD involves both major histocompatibility complex (MHC) and non-MHC genes.
  • Non-MHC genes associated with IgAD show overlap with genes implicated in autoimmune disorders like Graves' disease, lupus, type 1 diabetes, and celiac disease.
  • Cytokines, including interleukin 21, can induce IgA synthesis in vitro, suggesting a regulatory basis for the disease.

Conclusions:

  • IgAD is a polygenic disorder with identified contributing genes.
  • The genetic overlap with autoimmunity suggests that IgAD may itself be an autoimmune condition.
  • Understanding these genetic and regulatory mechanisms is crucial for IgAD management.