AICDA single nucleotide polymorphism in common variable immunodeficiency and selective IgA deficiency

Area of Science:

• Immunology
• Genetics
• Molecular Biology

Background:

• Primary antibody deficiencies (PADs) increase susceptibility to bacterial infections.
• Common variable immunodeficiency (CVID) and selective IgA deficiency (IgAD) are key PADs with unknown genetic causes.
• A prior European study suggested a link between an AICDA gene single nucleotide polymorphism (SNP) and PADs.

Purpose of the Study:

• To investigate the association between an AICDA gene intronic SNP (rs2580874) and PADs in Iranian patients.
• To evaluate if this genetic variant is linked to the development of CVID or IgAD.

Main Methods:

• Genotyping of the AICDA gene intronic SNP (rs2580874) using real-time PCR.
• Study included 58 Iranian patients with PAD (39 CVID, 19 IgAD) and 34 healthy controls.

Main Results:

• No statistically significant differences were observed in the distribution of AICDA genotypes (AA and GG) between PAD patients (CVID/IgAD) and healthy controls.
• The AA genotype was less frequent in IgAD patients (10.5%) compared to CVID patients (30.8%) and controls (38.2%), but this difference was not significant.
• The GG genotype frequency in PAD patients (20.7%) did not significantly differ from controls (8.8%).

Conclusions:

• The studied AICDA gene variant (rs2580874) is not significantly associated with the development of CVID or IgAD in the Iranian population.
• Further multi-center studies are warranted to explore potential genetic associations with PADs.