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Related Experiment Videos

Immunodeficiency with hyper-IgM (HIM).

L D Notarangelo1, M Duse, A G Ugazio

  • 1Department of Pediatrics, University of Brescia, Italy.

Immunodeficiency Reviews
|January 1, 1992
PubMed
Summary
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Immunodeficiency with hyper-IgM (HIM) is a rare genetic disorder causing recurrent infections due to low IgG and IgA. Research explores its genetic causes, clinical features, and treatment options like immunoglobulin therapy.

Area of Science:

  • Immunology
  • Genetics
  • Hematology

Background:

  • Immunodeficiency with hyper-IgM (HIM) is a rare disorder characterized by recurrent infections, low IgG and IgA, and normal to high IgM.
  • Primary and secondary forms exist, with genetic heterogeneity observed in primary HIM (X-linked, autosomal recessive, autosomal dominant).

Purpose of the Study:

  • To summarize the clinical manifestations, immunological abnormalities, and pathogenetic hypotheses of Immunodeficiency with hyper-IgM.
  • To discuss current treatment strategies for HIM syndrome.

Main Methods:

  • Literature review of primary and secondary HIM syndrome.
  • Analysis of clinical and immunological findings in reported HIM patients.
  • Review of genetic studies and pathogenetic hypotheses.

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Main Results:

  • Common manifestations include respiratory infections, otitis, diarrhea, oral ulcers, lymphoid hyperplasia, autoimmunity, and neutropenia.
  • Immunological hallmarks are lack of IgG/IgA secretion, failed vaccination response, and absent germinal centers.
  • The gene for X-linked HIM (HIGM1) is tentatively mapped to Xq24-27, but carrier detection and prenatal diagnosis are unavailable.

Conclusions:

  • HIM syndrome presents diverse clinical and immunological features, suggesting B-cell differentiation failure or defective immunoglobulin isotype switching.
  • Treatment primarily involves intravenous immunoglobulins, with steroids for neutropenia and autoimmunity.