Background: Interleukin-10 (IL-10) is an anti-inflammatory cytokine whose levels are elevated in patients with severe COVID-19. IL-10 polymorphisms may play a role in increasing IL-10 levels and the severity of COVID-19. This study aimed to investigate the relationship between IL-10 single nucleotide polymorphisms (SNPs) (rs1800896 [-1082 C < T], rs1800871 [-819 A > G], and rs1800872 [-592 T > G]) and the severity of COVID-19 in patients from Kermanshah Province, Iran. Methods: A total of 150 patients with mild COVID-19 (84 men and 66 women aged 40.1 ± 12.44 years) and 143 patients with severe COVID-19 (76 men and 67 women aged 61.04 ± 15.65 years) participated in this study. Blood samples were collected from the patients, DNA was extracted, and the genotype of each SNPs was determined using the polymerase chain reaction-restriction fragment length polymorphism method. Result: The results of this study did not show a significant relationship between the genotypes of the three studied SNPs and the severity of COVID-19 (p > 0.05). Conclusion: According to our findings, these SNPs were not associated with COVID-19 severity in patients in Kermanshah.
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