Genetic polymorphism ARG753GLN of TLR-2, LEU412PHE of TLR-3, ASP299GLY of TLR-4 in patients with influenza and influenza-associated pneumonia

[tetano]

Wiad Lek. 2019;72(12 cz 1):2324-2328. Genetic polymorphism ARG753GLN of TLR-2, LEU412PHE of TLR-3, ASP299GLY of TLR-4 in patients with influenza and influenza-associated pneumonia.

Pryimenko NO¹, Kotelevska TM¹, Koval TI¹, Syzova LM¹, Dubynska HM¹, Kaidashev IР¹.
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Abstract

OBJECTIVE:

The aim of the research is to study the prevalence and to determine the prognostic significance of polymorphism ARG753GLN of the TLR-2 gene, Leu412Phe of TLR-3, Asp299Gly of TLR-4 in influenza.
PATIENTS AND METHODS:

Materials and methods: 112 patients with influenza were examined (63 patients with uncomplicated course and 49 with influenza-associated pneumonia). The genotyping of the polymorphic site of ARG753GLN of the TLR-2 gene, Asp299Gly of the TLR-4 gene, and Leu412Phe of the TLR-3 gene was carried out by polymerase chain reaction using oligonucleotide primers.
RESULTS:

Results: It has found that the prevalence of the mutant allele 299Gly of TLR-4 in patients with uncomplicated influenza is 6.4 %, with influenza- associated pneumonia - 7.1 %, which exceeds the population control indicators by 3.8-4.3 times (1.7 %, p<0.05). Mutant allele 412Phe of TLR-3 is significantly more common in patients with influenzaassociated pneumonia (42.9%), as compared with uncomplicated influenza (24.6%, p<0.01) and healthy people (30.0%, p<0.05). The increased risk of influenza development is associated with the Asp/Gly genotype of TLR-4 (OR=4.22) and combination of mutant genotypes Leu/Phe and Phe/Phe of TLR-3 with Asp/Gly of TLR-4 and Arg/Gln of TLR-2 (OR=15.0); influenza-associated pneumonia - with genotype Phe/Phe of TLR-3 (OR=4.5).
CONCLUSION:

Conclusions: It has been found out that among patients with influenza and influenza-associated pneumonia, the mutant allele 299Gly of TLR-4 and combinations of polymorphisms Arg753Gln of TLR-2, Leu412Phe of TLR-3, Asp299Gly of TLR-4 are detected reliably more often. The frequency of the mutant allele 412Phe of TLR-3 is higher among patients with influenza-associated pneumonia. Markers of increased risk of influenza are 299Gly allele and genotype Asp/Gly of TLR-4 and the combination of mutant genotypes Leu/Phe and Phe/Phe of TLR-3 with Asp/Gly of TLR-4 and Arg/Gln of TLR-2; for influenza-associated pneumonia - allele 412Phe and genotype Phe/Phe of TLR-3.


KEYWORDS:

Arg753Gln polymorphism of the TLR-2 gene; Asp299Gly polymorphism of the TLR-4 gene; Leu412Phe polymorphism of the TLR-3 gene; genotype; influenza; influenza-associated pneumonia; allele

PMID: 32124747
[Indexed for MEDLINE]