Is the IL6-174 G/C (rs1800795) Single Nucleotide Polymorphism a Susceptibility Genetic Marker for COVID-19?
Student Research in Translational Medicine,
Vol. 8 (2026),
2 November 2026
Abstract
Background and Aim: SARS-CoV-2 infection triggers immune response which can induce pro-inflammatory cytokines including IL6 expression. We attempted to assess this genetic factor among patients suffering from SARS-CoV-2 infection in Tehran during pandemic since we assumed that it can be introduced as a biomarker for this virus.
Methods: In this case- control study we collected blood samples from 71 individuals infected with Covid-19 and 86 healthy controls, respectively in Imam Hossein hospital. DNA was extracted using phenol- chloroform, and we evaluated IL6 G/C polymorphism by PCR-RFLP.
Results: Our data revealed that the GG genotype was less frequent in COVID-19 patients (59.2%) than in healthy controls (64.0%). In contrast, the GC (26.8%) and CC (14.1%) genotypes were more frequent in patients than in controls (23.3% and 12.8%, respectively).
Conclusion: IL-6 seems to be different in numerous areas which can be utilized as a biomarker; nevertheless, further studies are required to confirm it.
- COVID-19
- Interleukin-6
- Single Nucleotide Polymorphism
- rs1800795
- L6 -174 G/C polymorphism
How to Cite
References
1. Thakkar S, Arora S, Kumar A, Jaswaney R, Faisaluddin M, Ammad Ud Din M, et al. A Systematic Review of the Cardiovascular Manifestations and Outcomes in the Setting of Coronavirus-19 Disease. Clin Med Insights Cardiol. 2020; 14:1179546820977196.
2. Yesudhas D, Srivastava A, Gromiha MM. COVID-19 outbreak: history, mechanism, transmission, structural studies and therapeutics. Infection. 2021; 49:199-213.
3. Jing Y, Run-Qian L, Hao-Ran W, Hao-Ran C, Ya-Bin L, Yang G, Fei C. Potential influence of COVID-19/ACE2 on the female reproductive system. Mol Hum Reprod. 2020; 26: 367-373.
4. Darif D, Hammi I, Kihel A, El Idrissi Saik I, Guessous F, Akarid K. The pro-inflammatory cytokines in COVID-19 pathogenesis: What goes wrong? Microb Pathog. 2021; 153:104799.
5. Moradian N, Gouravani M, Salehi MA, Heidari A, Shafeghat M, Hamblin MR, et al. Cytokine release syndrome: inhibition of pro-inflammatory cytokines as a solution for reducing COVID-19 mortality. Eur Cytokine Netw. 2020; 31:81-93.
6. Conti P, Caraffa A, Gallenga CE, Ross R, Kritas SK, Frydas I, et al. Coronavirus-19 (SARS-CoV-2) induces acute severe lung inflammation via IL-1 causing cytokine storm in COVID-19: a promising inhibitory strategy. J Biol Regul Homeost Agents. 2020; 34:1971-1975.
7. Gorji A, Khaleghi Ghadiri M. Potential roles of micronutrient deficiency and immune system dysfunction in the coronavirus disease 2019 (COVID-19) pandemic. Nutrition. 2021; 82:111047.
8. Abobaker A, Nagib T, Alsoufi A. The impact of certain genetic variants (single nucleotide polymorphisms) on incidence and severity of COVID-19. J Gene Med. 2021; 23:e3310.
9. Lu Q, Zhu Z, Tan C, Zhou H, Hu Y, Shen G, et al. Changes of serum IL-10, IL-1β, IL-6, MCP-1, TNF-α, IP-10 and IL-4 in COVID-19 patients. Int J Clin Pract. 2021; 75:e14462.
10. Kunsch C, Lang RK, Rosen CA, Shannon MF. Synergistic transcriptional activation of the IL-8 gene by NF-kappa B p65 (RelA) and NF-IL-6. J Immunol. 1994; 153:153-64.
11. Wang L, Walia B, Evans J, Gewirtz AT, Merlin D, Sitaraman SV. IL-6 induces NF-kappa B activation in the intestinal epithelia. J Immunol. 2003; 171:3194-201.
12. Rai H, Colleran R, Cassese S, Joner M, Kastrati A, Byrne RA. Association of interleukin 6 -174 G/C polymorphism with coronary artery disease and circulating IL-6 levels: a systematic review and meta-analysis. Inflamm Res. 2021; 70:1075-1087.
13. Paces J, Strizova Z, Smrz D, Cerny J. COVID-19 and the immune system. Physiol Res. 2020; 69:379-388.
14. Taghizadeh-Hesary F, Akbari H. The powerful immune system against powerful COVID-19: A hypothesis. Med Hypotheses. 2020; 140:109762.
15. Mazzoni A, Salvati L, Maggi L, Capone M, Vanni A, Spinicci M, et al. Impaired immune cell cytotoxicity in severe COVID-19 is IL-6 dependent. J Clin Invest. 2020; 130:4694-4703.
16. Han IH, Song HO, Ryu JS. IL-6 produced by prostate epithelial cells stimulated with Trichomonas vaginalis promotes proliferation of prostate cancer cells by inducing M2 polarization of THP-1-derived macrophages. PLoS Negl Trop Dis. 2020; 14:e0008126.
17. Kerget F, Kerget B. Frequency of Interleukin-6 rs1800795 (-174G/C) and rs1800797 (-597G/A) Polymorphisms in COVID-19 Patients in Turkey Who Develop Macrophage Activation Syndrome. Jpn J Infect Dis. 2021; 74:543-548.
18. Fishchuk L, Rossokha Z, Pokhylko V, Cherniavska Y, Tsvirenko S, Kovtun S, et al. Modifying effects of TNF-α, IL-6 and VDR genes on the development risk and the course of COVID-19. Pilot study. Drug Metab Pers Ther. 2021; 37:133-139.
19. Falahi S, Zamanian MH, Feizollahi P, Rezaiemanesh A, Salari F, Mahmoudi Z, et al. Evaluation of the relationship between IL-6 gene single nucleotide polymorphisms and the severity of COVID-19 in an Iranian population. Cytokine. 2022; 154:155889.
20. Ulhaq ZS, Soraya GV. Anti-IL-6 receptor antibody treatment for severe COVID-19 and the potential implication of IL-6 gene polymorphisms in novel coronavirus pneumonia. Med Clin (Engl Ed). 2020; 155:548-556.
21. Gong B, Huang L, He Y, Xie W, Yin Y, Shi Y, et al. A genetic variant in IL-6 lowering its expression is protective for critical patients with COVID-19. Signal Transduct Target Ther. 2022; 7:112.
22. Mulla S, Molla MMA, Ahmed SMA, Akhtaruzzaman AKM, Saleh AA, Anwar S. Association of interferon gamma inducible protein-10, monocyte chemoattractant protein-1, macrophage inflammatory protein-1 alpha, interleukin-6, and rs12252 single nucleotide polymorphism of interferon-induced transmembrane protein-3 gene with the severity of COVID-19 infection. Egypt J Intern Med. 2022; 34:53.
23. Zhang Y, Qin L, Zhao Y, Zhang P, Xu B, Li K, et al. Interferon-Induced Transmembrane Protein 3 Genetic Variant rs12252-C Associated With Disease Severity in Coronavirus Disease 2019. J Infect Dis. 2020; 222:34-37.
24. Mahmood AA, Gheni DA, Ibrahim MI, Abdullabass HK, Hayyawi AR. Role of SNPs of IL6 gene in the incidence and progression of COVID19 patients in Wasit province. Journal of Pharmaceutical Negative Results. 2022: 537-45.
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