Heterogeneous clinical presentation in ICF syndrome: correlation with underlying gene defects
Corry M R Weemaes1, Maarten J D van Tol, Jun Wang
1Department of Pediatric Infectious Diseases and Immunology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
European Journal of Human Genetics : EJHG
|March 15, 2013
Summary
Immunodeficiency with centromeric instability and facial anomalies (ICF) syndrome presents with varied clinical features based on genetic mutations. Understanding these genotype-phenotype correlations aids in diagnosis and management of this primary immunodeficiency.
Area of Science:
- Immunology
- Genetics
- Epigenetics
Background:
- Immunodeficiency with centromeric instability and facial anomalies (ICF) syndrome is a rare primary immunodeficiency.
- It is characterized by agammaglobulinemia, centromere instability, and distinct facial anomalies.
- Mutations in DNMT3B and ZBTB24 genes are known causes of ICF syndrome.
Purpose of the Study:
- To characterize the clinical features of ICF syndrome.
- To investigate genotype-phenotype correlations in ICF patients.
- To compare clinical and genetic data across different ICF subtypes.
Main Methods:
- Comparative analysis of clinical and genetic data from 44 ICF patients.
- Categorization of patients based on identified gene mutations: DNMT3B (ICF1), ZBTB24 (ICF2), and unidentified (ICFX).
- Systematic evaluation of reported informative cases to identify key differences.
Main Results:
- Humoral immunodeficiency is generally more severe in ICF1 (DNMT3B mutations) patients.
- Both B-cell and T-cell compartments are affected in ICF1 and ICF2 (ZBTB24 mutations) subtypes.
- ICF2 patients exhibit a significantly higher incidence of intellectual disability.
- Congenital malformations are noted in some cases of both ICF1 and ICF2.
Conclusions:
- Distinct clinical presentations and genotype-phenotype correlations exist within ICF syndrome subtypes.
- These findings can guide mutation-screening strategies for ICF syndrome.
- Improved understanding facilitates better diagnostic counseling for affected individuals.
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