Evidence map›Paper›PMID 34170561›Full record

ArticleJournal of medical virology2021

Polymorphisms of ACE (I/D) and ACE2 receptor gene (Rs2106809, Rs2285666) are not related to the clinical course of COVID-19: A case study.

Sevim Karakaş Çelik, Güneş Çakmak Genç, Nihal Pişkin, Bilgehan Açikgöz, Bülent Altinsoy, Başak Kurucu İşsiz, Ahmet Dursun

Open access · bronzeAbstract read
In one paragraph

Article in Journal of medical virology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 62 papers, 7 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
62citing papers in PubMed, 7 pooled it
6.0field-weighted citation impact, top 3% 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

62 citing papers in PubMed, 7 syntheses or guidelines pooled it, 102 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. Pooled it
  6. Pooled it
  7. Frontiers in genetics · 2022
    Pooled it
  8. Article
  9. Article
  10. Genetic Analysis and Clinical Effect ofSultan Qaboos University medical journal · 2026
    Article
  11. Article
  12. The I/D variant of theFuture science OA · 2025
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Evaluation of the relationship betweenAsian biomedicine : research, reviews and news · 2024
    Article
  18. Article
  19. Article
  20. Article

2 more citing papers are in PubMed but not listed here.

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.

Sevim Karakaş ÇelikDepartment of Medical Genetics, Zonguldak Bulent Ecevit University, Zonguldak, Turkey.ORCID https://orcid.org/0000-0003-0505-7850
Güneş Çakmak GençDepartment of Medical Genetics, Zonguldak Bulent Ecevit University, Zonguldak, Turkey.ORCID https://orcid.org/0000-0001-7222-0377
Nihal PişkinDepartment of Infectious Diseases and Clinical Microbiology, Zonguldak Bulent Ecevit University, Zonguldak, Turkey.ORCID https://orcid.org/0000-0002-5963-592X
Bilgehan AçikgözDepartment of Public Health, Zonguldak Bulent Ecevit University, Zonguldak, Turkey.ORCID https://orcid.org/0000-0002-1405-5841
Bülent AltinsoyDepartment of Pulmonary Medicine, Zonguldak Bulent Ecevit University, Zonguldak, Turkey.ORCID https://orcid.org/0000-0002-2481-0978
Başak Kurucu İşsizDepartment of Medical Genetics, Zonguldak Bulent Ecevit University, Zonguldak, Turkey.ORCID https://orcid.org/0000-0002-6072-8103
Ahmet DursunDepartment of Medical Genetics, Zonguldak Bulent Ecevit University, Zonguldak, Turkey.ORCID https://orcid.org/0000-0002-7625-837X
Bülent Ecevit University · TR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Coronavirus disease 2019 (COVID-19) is an infectious disease, and the reason behind the currently ongoing pandemic, caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Angiotensin-converting enzyme (ACE2) has been recognized as the specific receptor of the SARS-CoV-2 virus. Although the possible effect of ACE2 gene polymorphism remains unknown, human ACE2 receptor expression influences SARS-CoV-2 susceptibility and COVID-19 disease outcome. In this study, we aimed to investigate the relationship between ACE gene I/D polymorphism, ACE2 receptor gene polymorphism, and COVID-19 severity. ACE gene insertion/deletion (I/D) polymorphism and ACE2 receptor gene rs2106809 and rs2285666 polymorphisms were determined using polymerase chain reaction (PCR) and PCR-based restriction fragment length polymorphism methods, respectively, in 155 COVID-19 patients who were divided into three groups (mild, moderate, and severe) according to clinical symptoms. However, the distribution of genotype and allele frequencies of ACE gene I/D, ACE2 receptor gene rs2106809, and rs2285666 polymorphisms were not statistically significant in all groups. In conclusion, in the study population, ACE gene I/D, ACE2 receptor gene rs2106809, and rs2285666 polymorphisms were not associated with the severity of COVID-19 infection. Although ACE2 receptor gene expression may affect the susceptibility to COVID-19, there is no existing evidence that the ACE or ACE2 gene polymorphisms are directly associated with COVID-19 severity. Interindividual differences in COVID-19 severity might be related to epigenetic mechanisms of ACE2 receptor gene expression or variations in other genes suggested to play a critical role in COVID-19 pathogenesis such as pro-inflammatory cytokines and coagulation indicators.

Indexed as

AdultAgedAngiotensin-Converting Enzyme 2COVID-19Gene FrequencyGenetic Association StudiesGenotypeHumansMiddle AgedNegative ResultsPeptidyl-Dipeptidase APolymorphism, Single NucleotideSARS-CoV-2Severity of Illness IndexACE2 protein, humanACE protein, humanAngiotensin-Converting Enzyme 2Peptidyl-Dipeptidase AACEACE2COVID-19rs2106809rs2285666

Identifiers

PMID34170561
PMCPMC8426884
OpenAlexW3174411711

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

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.