IFNL4 rs12979860 polymorphism in patients with herpetic keratitis and a history of COVID-19
DOI:
https://doi.org/10.31288/Ukr.j.ophthalmol.20261513Keywords:
herpetic keratitis, COVID-19, gene polymorphism, IFNL4, corneaAbstract
Purpose: To investigate a possible association between IFNL4 rs12979860 variants and susceptibility to herpetic keratitis (HK) in individuals with a history of COVID-19.
Material and Methods: The study group included 50 eyes in 50 patients with HK and a history of COVID-19 (16 patients with primary HK and 34 patients with recurrent HK). Patients were genotyped for IFNL4 rs12979860 using Taqman probe real-time polymerase chain reaction. Analysis of amplification curves was performed to obtain all polymorphic variants of IFNL4 SNP rs12979860. Genotyping data of the comparison group (n = 73; women with a history of COVID-19 of various severity but without manifestations of eye disease during hospitalization for COVID-19) were available from project N 0120U104508 and were used for analysis in this study. Genotyping data of the population control group (n = 100) were available from the database of the Human Genomics Laboratory, Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine and were used as controls. These groups included healthy individuals from various Ukrainian regions who were not related to each other.
Results: Fisher exact test showed a significant difference (р < 0.05) in the distribution of genotypes and polymorphic variants (alleles) between the study group and the comparison group and between the study group and the control group. We compared the distribution of genotype and alleles for rs12979860 between patients with recurrent HK and the control group. The homozygous (CC) genotype of rs12979860 was significantly more common in patients with HK.
Conclusion: We found an association between the homozygous CC genotype of IFNL4 (SNP rs12979860) with recurrent HK. The C allele could be viewed as a genetic marker of inherited predisposition to HK in individuals with a history of COVID-19.
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