Evidence map›Paper›PMID 35461173›Full record

ArticleCytokine2022

Evaluation of the relationship between IL-6 gene single nucleotide polymorphisms and the severity of COVID-19 in an Iranian population.

Sara Falahi, Mohammad Hossein Zamanian, Parisa Feizollahi, Alireza Rezaiemanesh, Farhad Salari, Zahra Mahmoudi, Ali Gorgin Karaji

Open access · greenAbstract read
In one paragraph

Article in Cytokine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 2 pooled it
3.2field-weighted citation impact, top 6% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed, 2 syntheses or guidelines pooled it, 35 citations in OpenAlex.

  1. Pooled it
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  3. Association ofDiseases (Basel, Switzerland) · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 1 institution in 1 country.

Sara FalahiStudent Research Committee, School of Medicine, Kermanshah University of Medical, Sciences, Kermanshah, Iran.
Mohammad Hossein ZamanianDepartment of Pediatrics, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran.
Parisa FeizollahiStudent Research Committee, School of Medicine, Kermanshah University of Medical, Sciences, Kermanshah, Iran.
Alireza RezaiemaneshDepartment of Immunology, School of Medicine, Kermanshah University of Medical, Sciences, Kermanshah, Iran.
Farhad SalariDepartment of Immunology, School of Medicine, Kermanshah University of Medical, Sciences, Kermanshah, Iran.
Zahra MahmoudiStudent Research Committee, School of Medicine, Kermanshah University of Medical, Sciences, Kermanshah, Iran.
Ali Gorgin KarajiDepartment of Immunology, School of Medicine, Kermanshah University of Medical, Sciences, Kermanshah, Iran. Electronic address: a_gorginkaraji@kums.ac.ir.
Kermanshah University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundEmerged coronavirus disease 2019 (COVID-19) is a pandemic caused by the severe acute respiratory syndrome coronavirus 2 (SARS-COV-2). Disease severity is associated with elevated levels of proinflammatory cytokines, such as interleukin-6 (IL-6). Genetic polymorphisms in the regulatory regions of cytokine genes may be associated with differential cytokine production in COVID-19 patients. This study aimed to investigate the association between three potentially functional single-nucleotide polymorphisms (SNPs) in the promoter region of IL-6 and the severity of susceptibility to COVID-19 in an Iranian population.

methodsIn total, 346 individuals (175 patients with severe COVID-19 and 171 patients with mild COVID-19) were recruited for this cohort study. Genomic DNA was extracted from peripheral blood leukocytes of patients to determine the genotypes of three selected SNPs (rs1800795 (-174 G > C), rs1800796 (-572 G > C), and rs1800797 (-597 G > A)) in the promoter region of the IL-6 gene using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method.

resultsThere were no significant differences in the genotype or allele distribution of selected SNPs (rs1800795 (-174 G > C), rs1800796 (-572 G > C), and rs1800797 (-597 G > A)) in the promoter region of the IL-6 gene in patients with severe COVID-19 and patients with mild COVID-19. DISCUSSION: Our study indicated that these SNPs are not associated with COVID-19 severity in the Kurdish population from Kermanshah, Iran.

Indexed as

COVID-19Interleukin-6Polymorphism, Single NucleotideCase-Control StudiesCohort StudiesCytokinesGene FrequencyGenetic Predisposition to DiseaseGenotypeHumansIranSARS-CoV-2CytokinesIL6 protein, humanInterleukin-6Coronavirus disease 2019 (COVID-19)IL-6PCR-RFLPSingle nucleotide polymorphism

Identifiers

PMID35461173
PMCPMC9015956
OpenAlexW4224224380

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.