Evidence map›Paper›PMID 21182542›Full record

ArticleJournal of gastroenterology and hepatology2011

Single nucleotide polymorphism at exon 7 splice acceptor site of OAS1 gene determines response of hepatitis C virus patients to interferon therapy.

Mostafa K El Awady, Mohamed A Anany, Gamal Esmat, Naglaa Zayed, Ashraf A Tabll, Amr Helmy, Abdel Rahman El Zayady, Mohga S Abdalla, Hayat M Sharada, Maissa El Raziky and 3 more

Abstract read
In one paragraph

Article in Journal of gastroenterology and hepatology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

29 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. The FunctionalInternational journal of molecular sciences · 2026
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  7. The Many Faces of Oligoadenylate Synthetases.Journal of interferon & cytokine research : the official journal of the International Society for Interferon and Cytokine Research · 2023
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  11. A genomic region associated with protection against severe COVID-19 is inherited from Neandertals.Proceedings of the National Academy of Sciences of the United States of America · 2021
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  12. Review
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  20. Impact of IL28B andWorld journal of gastroenterology · 2016
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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

13 authors.

Mostafa K El AwadyDepartment of Microbial Biotechnology, National Research Center, Dokki, Giza, Egypt.
Mohamed A Anany
Gamal Esmat
Naglaa Zayed
Ashraf A Tabll
Amr Helmy
Abdel Rahman El Zayady
Mohga S Abdalla
Hayat M Sharada
Maissa El Raziky
Wafaa El Akel
Shadia Abdalla
Noha G Bader El Din

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

BACKGROUND AND

aimResponse to interferon therapy and disease progression in hepatitis C virus (HCV) infected patients differs among individuals, suggesting a possibility of a contribution of host genetic factors. 2'-5'-oligoadenylate synthetase 1 (OAS1), an important component of the innate immune system with a proven antiviral function, may therefore have a relationship with the response to interferon therapy and clinical course of HCV disease. Our aim was to determine the frequency of single nucleotide polymorphism (SNP) at exon 7 splice acceptor site (SAS) of the OAS1 gene in relation to the interferon response and status of HCV infection.

methodsA 203 bp fragment containing exon 7 SAS was amplified in 70 HCV chronic patients and 50 healthy controls. SNP was examined using restriction fragment length polymorphism (RFLP) genotyping method. Correlations of SNP genotypes with response to interferon and clinical status of patients were statistically analyzed.

resultsThere was an increasing trend of response from AA to AG to GG genotypes (P = 0.007). Genotype AA was associated with non-response to interferon and higher degree of liver fibrosis (P = 0.05). Multivariate analysis showed this SNP as independent and a significant determinant of the outcome of interferon therapy (odds ratio 4.913 [95% confidence interval 1.365-8.2], P = 0.006).

conclusionsThis is the first study to show a significant association between the functional SNP at exon 7 SAS of OAS1 gene and the viral response to interferon in chronic HCV patients. Patients with AA genotype were associated with progressive HCV disease and viral resistance to interferon therapy. This OAS SNP is a potential bio-marker to predict IFN response in chronic hepatitis C patients.

Indexed as

Polymorphism, Single Nucleotide2',5'-Oligoadenylate SynthetaseAdultAntiviral AgentsCase-Control StudiesChi-Square DistributionDNA Mutational AnalysisDrug Resistance, ViralDrug Therapy, CombinationEgyptExonsFemaleGene FrequencyGenotypeHepacivirusHepatitis C, Chronic2',5'-Oligoadenylate SynthetaseAntiviral AgentsInterferon-alphaInterferon alpha-2OAS1 protein, humanpeginterferon alfa-2aPolyethylene GlycolsRecombinant ProteinsRibavirinRNA Splice Sites

Identifiers

PMID21182542
PMCPMC7166793

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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.