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Immunodeficiency Diseases01:25

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Immunodeficiency disorders are conditions in which the immune system's ability to fight infectious disease and cancer is compromised or entirely absent. The immune system comprises a complex network of cells, tissues, and organs that work together to protect the body from potentially harmful invaders. When this system is deficient or not functioning properly, it leaves the body susceptible to infections, diseases, or other complications.
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The initiation of cell-mediated immunity can be observed as early as the third month of fetal growth, with active antibody-mediated immunity following approximately one month later.
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Current genetic landscape in common variable immune deficiency.

Hassan Abolhassani1,2, Lennart Hammarström1, Charlotte Cunningham-Rundles3,4

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

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Summary
This summary is machine-generated.

Genetic analysis of common variable immunodeficiency (CVID) in 571 patients identified 68 disease-causing genes, highlighting the complex genetic basis of this immune disorder and varying mutation frequencies across populations.

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Area of Science:

  • Immunology
  • Genetics
  • Human Pathology

Background:

  • Common variable immunodeficiency (CVID) is a heterogeneous primary immunodeficiency characterized by impaired antibody production.
  • Understanding the genetic underpinnings of CVID is crucial for diagnosis and management.

Purpose of the Study:

  • To investigate the genetic causes of CVID in diverse patient cohorts using whole-exome sequencing.
  • To identify disease-causing genes and analyze their prevalence and correlation with clinical phenotypes.

Main Methods:

  • Whole-exome sequencing was performed on 571 CVID patients from the United States, Sweden, and Iran.
  • Genetic variants were analyzed to identify known disease-causing genes associated with CVID.

Main Results:

  • Sixty-eight known disease-causing genes were identified across the cohorts.
  • Mutation frequencies varied, with 31% in the US, 36% in Sweden, and 54% in Iran.
  • No specific gene defect was consistently linked to particular clinical patterns, indicating significant phenotypic overlap.

Conclusions:

  • The genetic landscape of CVID is complex, involving numerous genes essential for B-cell function.
  • Genetic diagnosis rates and mutation frequencies differ among populations.
  • CVID presents a complex immunologic phenotype with considerable overlap in clinical manifestations, challenging simple genotype-phenotype correlations.