Association between IFN-γ +874T/A SNP and COVID-19 Severity

Area of Science:

• Genetics
• Immunology
• Infectious Diseases

Background:

• COVID-19 severity varies due to individual differences, with genetic factors playing a key role.
• The interferon-gamma (IFN-γ) gene, specifically the +874T/A single nucleotide polymorphism (SNP), is implicated in immune responses and potential COVID-19 severity.
• Understanding genetic predispositions is crucial for personalized COVID-19 management.

Purpose of the Study:

• To investigate the association between the IFN-γ +874T/A SNP and the clinical outcomes of COVID-19 patients.
• To determine if specific genotypes or alleles of the IFN-γ +874T/A SNP correlate with COVID-19 severity.
• To identify genetic markers that may predict severe disease progression in COVID-19.

Main Methods:

• Genomic DNA was extracted from leukocytes of 416 individuals (206 critically ill COVID-19 patients and 210 healthy controls) in Iran.
• The IFN-γ +874T/A SNP was genotyped using the amplification refractory mutation system-polymerase chain reaction (ARMS-PCR) method.
• Statistical analysis was performed to compare genotype and allele frequencies between patient and control groups.

Main Results:

• The AA genotype of the IFN-γ +874T/A SNP was significantly more prevalent in critically ill COVID-19 patients compared to healthy controls.
• Conversely, AT and TT genotypes were more common in the healthy control group.
• The A allele was more frequent in severe COVID-19 patients, while the T allele was more frequent in healthy individuals.

Conclusions:

• The IFN-γ +874T/A SNP is a significant genetic factor associated with COVID-19 severity.
• This genetic variant may influence immune responses, contributing to differential disease outcomes.
• Findings support the role of genetic predisposition in COVID-19 severity and highlight potential for personalized medicine approaches.