Exploring Monogenic, Polygenic, and Epigenetic Models of Common Variable Immunodeficiency.

Area of Science:

• Immunology
• Genetics
• Molecular Biology

Background:

• Common variable immunodeficiency (CVID) is the most prevalent symptomatic inborn error of immunity (IEI).
• CVID exhibits genetic heterogeneity, presenting in sporadic and familial forms with diverse inheritance patterns.
• The precise pathogenic mechanisms and molecular underpinnings of CVID remain largely unknown.

Purpose of the Study:

• To review the current understanding of the molecular genetic basis of CVID.
• To explore monogenic, polygenic, and epigenetic factors contributing to CVID pathogenesis.
• To highlight the need for further studies on genome-wide associations and epigenetic modifications in CVID.

Main Methods:

• Literature review of existing studies on CVID genetics.
• Analysis of data concerning monogenic mutations, polygenic inheritance models, and epigenetic modifications.
• Synthesis of current knowledge on the molecular basis of CVID.

Main Results:

• Monogenic mutations are identified in a small fraction of CVID patients.
• Multifactorial or polygenic inheritance, including epistasis and environmental factors, is likely involved in many cases.
• Epigenetic modifications, such as DNA methylation, are proposed contributors to CVID pathogenesis.

Conclusions:

• The genetic architecture of CVID is complex, involving more than single-gene defects in many individuals.
• Identifying genetic patterns across the genome and epigenetic profiles is crucial for advancing CVID research.
• Further investigation into polygenic models and epigenetic factors is essential for a comprehensive understanding of CVID.