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Published on: April 1, 2019
Impact of Toll-Like Receptor 2 and 9 Gene Polymorphisms on COVID-19: Susceptibility, Severity, and Thrombosis
Alshaymaa M Alhabibi1, Asmaa S Hassan1, Nashwa Mohamed Abd Elbaky1
1Departments of Clinical Pathology, Faculty of Medicine for Girls, Al-Azhar University, Cairo, Egypt.
Background:
Toll-like receptors (TLRs) play an important role in activation of innate and adaptive immune responses.
Aim:
We aimed to detect the association between TLR2 rs5743708 G>A and TLR9 rs5743836 C>T variants and COVID-19 disease susceptibility, severity, and thrombosis by using neutrophil extracellular traps (NETs).
Subjects And Methods:
We included 100 adult COVID-19 patients as well as 100 age- and gender-matched normal controls. Participants were genotyped for TLR2 rs5743708 and TLR9 rs5743836. Citrullinated Histone (H3) was detected as an indicator of NETs.
Results:
The mutant (G/A and C/C) genotypes and (A and C) alleles of TLR2 rs5743708 and TLR9 rs5743836, respectively, have been significantly related to a higher risk of COVID-19 infection, representing a significant risk factor for the severity of COVID-19. There was no significant association between the two variants and citrullinated histone (H3).
Conclusion:
TLR2 rs5743708 and TLR9 rs5743836 variants have been significantly related to a higher risk and severity of COVID-19 infection but had no effect on thrombus formation.
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