Evidence map›Paper›PMID 21900546›Full record

ArticleGut2012

NADPH oxidase complex and IBD candidate gene studies: identification of a rare variant in NCF2 that results in reduced binding to RAC2.

Aleixo M Muise, Wei Xu, Cong-Hui Guo, Thomas D Walters, Victorien M Wolters, Ramzi Fattouh, Grace Y Lam, Pingzhao Hu, Ryan Murchie, Mary Sherlock and 13 more

Erratum issuedOpen access · greenAbstract read
In one paragraph

Article in Gut, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 111 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
111citing papers in PubMed, 3 pooled it
5.2field-weighted citation impact, top 4% 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

111 citing papers in PubMed, 3 syntheses or guidelines pooled it, 177 citations in OpenAlex.

  1. Pooled it
  2. TNFRSF1B Is Associated with ANCA in IBD.Inflammatory bowel diseases · 2016
    Pooled it
  3. Association between NCF4 rs4821544T/C polymorphism and inflammatory bowel disease risk in Caucasian: a meta-analysis.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2015
    Pooled it
  4. Trial
  5. Temporal transcriptomic profiling identifies core regulators in cytokine-induced gut barrier disruption in differentiated Caco-2 cells.Inflammation research : official journal of the European Histamine Research Society ... [et al.] · 2026
    Article
  6. Article
  7. Article
  8. Review
  9. Host-pathobiont interactions in Crohn's disease.Nature reviews. Gastroenterology & hepatology · 2025
    Review
  10. Review
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Article
  18. NADAntioxidants (Basel, Switzerland) · 2023
    Review
  19. Article
  20. Review

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

23 authors at 7 institutions in 4 countries.

Aleixo M MuiseDivision of Gastroenterology, Hepatology, and Nutrition, Department of Paediatrics, Hospital for Sick Children, Toronto, Ontario, Canada. aleixo.muise@utoronto.ca
Wei Xu
Cong-Hui Guo
Thomas D Walters
Victorien M Wolters
Ramzi Fattouh
Grace Y Lam
Pingzhao Hu
Ryan Murchie
Mary Sherlock
Juan Cristóbal Gana
NEOPICS
Richard K Russell
Michael Glogauer
Richard H Duerr
Judy H Cho
Charlie W Lees
Jack Satsangi
David C Wilson
Andrew D Paterson
Anne M Griffiths
Mark S Silverberg
John H Brumell
University of Toronto · CAHospital for Sick Children · CAWestern General Hospital · GBMount Sinai Hospital · CAPontificia Universidad Católica de Chile · CLRoyal Hospital for Children · GBYale University · US

Funding

NIDDK IBD Genetics Consortium Genetic Research CenterU01DK062420 · NIDDK · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI DUERR, RICHARD H · 2002 to 2021
$7.8M
Impact of Genetic Variability on Cellular Pathways and Host-Microbiome InteractioU01DK062423 · NIDDK · SINAI HEALTH SYSTEM · PI MARK S. SILVERBERG · 2002 to 2026
$7.5M
Chief Scientist Office CZB/4/540Chief Scientist Office ETM/137Chief Scientist Office ETM/75CIHR MOP97756Medical Research Council G0600329Medical Research Council G0800675Medical Research Council G0800759Medical Research Council G1002033NIDDK NIH HHS DK062420NIDDK NIH HHS DK-06-2423NIDDK NIH HHS U01 DK062420NIDDK NIH HHS U01 DK062423Wellcome TrustWellcome Trust 072789/Z/03/Z
6 · The paper itself

Abstract

objectiveThe NOX2 NADPH oxidase complex produces reactive oxygen species and plays a critical role in the killing of microbes by phagocytes. Genetic mutations in genes encoding components of the complex result in both X-linked and autosomal recessive forms of chronic granulomatous disease (CGD). Patients with CGD often develop intestinal inflammation that is histologically similar to Crohn's colitis, suggesting a common aetiology for both diseases. The aim of this study is to determine if polymorphisms in NOX2 NADPH oxidase complex genes that do not cause CGD are associated with the development of inflammatory bowel disease (IBD).

methodsDirect sequencing and candidate gene approaches were used to identify susceptibility loci in NADPH oxidase complex genes. Functional studies were carried out on identified variants. Novel findings were replicated in independent cohorts.

resultsSequence analysis identified a novel missense variant in the neutrophil cytosolic factor 2 (NCF2) gene that is associated with very early onset IBD (VEO-IBD) and subsequently found in 4% of patients with VEO-IBD compared with 0.2% of controls (p=1.3×10(-5), OR 23.8 (95% CI 3.9 to 142.5); Fisher exact test). This variant reduced binding of the NCF2 gene product p67(phox) to RAC2. This study found a novel genetic association of RAC2 with Crohn's disease (CD) and replicated the previously reported association of NCF4 with ileal CD.

conclusionThese studies suggest that the rare novel p67(phox) variant results in partial inhibition of oxidase function and are associated with CD in a subgroup of patients with VEO-IBD; and suggest that components of the NADPH oxidase complex are associated with CD.

Indexed as

Mutation, MissensePolymorphism, Single NucleotideCrohn DiseaseGenotyping TechniquesGranulomatous Disease, ChronicHumansInflammatory Bowel DiseasesNADPH OxidasesRAC2 GTP-Binding Proteinrac GTP-Binding ProteinsReactive Oxygen SpeciesReverse Transcriptase Polymerase Chain ReactionSequence Analysis, DNANADPH OxidasesNCF2 protein, humanRAC2 GTP-Binding Proteinrac GTP-Binding ProteinsReactive Oxygen Species

Identifiers

PMID21900546
PMCPMC3806486
OpenAlexW2153210191

What OpenQuestion holds

Textmetadata
LicenceTDM
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.