Evidence map›Paper›PMID 31794059›Full record

SynthesisThe British journal of dermatology2020

What is the evidence for interactions between filaggrin null mutations and environmental exposures in the aetiology of atopic dermatitis? A systematic review.

H Blakeway, V Van-de-Velde, V B Allen, G Kravvas, L Palla, M J Page, C Flohr, R B Weller, A D Irvine, T McPherson and 7 more

Open access · hybridAbstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in The British journal of dermatology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed, 3 pooled it
3.2field-weighted citation impact, top 9% 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

17 citing papers in PubMed, 3 syntheses or guidelines pooled it, 34 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Early-Life Secondhand Smoke Exposure and Development of Atopic Dermatitis up to Adulthood.Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology · 2026
    Article
  5. Article
  6. Article
  7. Update on the genetics of allergic diseases.The Journal of allergy and clinical immunology · 2025
    Review
  8. Atopic dermatitis and tobacco smoke exposure during childhood and adolescence.The journal of allergy and clinical immunology. Global · 2025
    Article
  9. Genetic and Immunological Pathogenesis of Atopic Dermatitis.The Journal of investigative dermatology · 2024
    Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. The Role of Environmental Exposures in Atopic Dermatitis.Current allergy and asthma reports · 2020
    Review
  16. Article
  17. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

17 authors at 11 institutions in 3 countries.

H BlakewayFaculty of Health Sciences, University of Bristol, Bristol Medical School, Oakfield House, Oakfield Grove, Bristol, BS8 2BN, U.K.ORCID 0000-0003-4000-8923
V Van-de-VeldeDepartment of Dermatology, Lauriston Building, Lauriston Place, Edinburgh, EH3 9HA, U.K.
V B AllenDepartment of Infection, St. Thomas' Hospital, Westminster Bridge Rd, Lambeth, London, SE1 7EH, U.K.
G KravvasDepartment of Dermatology, Lauriston Building, Lauriston Place, Edinburgh, EH3 9HA, U.K.ORCID 0000-0002-1924-0149
L PallaDepartment of Medical Statistics, London School of Hygiene and Tropical Medicine, London, U.K.
M J PageSchool of Public Health and Preventive Medicine, Monash University, Level 4, 553 St Kilda Road, Melbourne, 3004, Australia.
C FlohrUnit for Population-Based Dermatology Research, St John's Institute of Dermatology, Guy's & St Thomas' NHS Foundation Trust & King's College London, Strand, London, WC2R 2LS, U.K.ORCID 0000-0003-4884-6286
R B WellerDepartment of Dermatology, Lauriston Building, Lauriston Place, Edinburgh, EH3 9HA, U.K.ORCID 0000-0003-2550-9586
A D IrvineClinical Medicine, Trinity College Dublin, Dublin, Ireland.ORCID 0000-0002-9048-2044
T McPhersonChurchill Hospital, Old Road, Headington, Oxford, OX3 7LE, U.K.
A RobertsNottingham Support Group for Carers of Children with Eczema, Nottingham, U.K.
H C WilliamsCentre of Evidence-Based Dermatology, University of Nottingham, Nottingham, NG7 2NR, U.K.
N ReynoldsDermatology, Royal Victoria Infirmary, NHS Foundation Trust, Newcastle upon Tyne, U.K.
S J BrownSkin Research Group, Division of Molecular and Clinical Medicine, School of Medicine, University of Dundee, Dundee, DD1 9SY, U.K.ORCID 0000-0002-3232-5251
L PaternosterMRC Integrative Epidemiology Unit at the University of Bristol, Population Health Sciences, Bristol Medical School, Oakfield House, Oakfield Grove, Bristol, BS8 2BN, U.K.ORCID 0000-0003-2514-0889
S M LanganFaculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, WC1E 7HT, U.K.ORCID 0000-0002-7022-7441
(on behalf of UK TREND Eczema Network)
Edinburgh Royal Infirmary · GBUniversity of Bristol · GBUniversity of London · GBUniversity of Nottingham · GBChurchill Hospital · GBGuy's and St Thomas' NHS Foundation Trust · GBMonash University · AURoyal Victoria Infirmary · GBSt Thomas' Hospital · GBTrinity College Dublin · IEUniversity of Dundee · GB

Funding

Academy of Medical Sciences SBF003\1094Australian National Health and Medical Research Council Early Career Fellowship 1088535Department of Health CDF-2014-07-037Newcastle MRC/EPSRC Molecular Pathology NodeNewcastle NIHR Medtech and In vitro diagnostic Co-operativeNIHR Biomedical Research Centre, Royal Marsden NHS Foundation Trust/Institute of Cancer ResearchThe European Union Horizon 2020-funded BIOMAP ConsortiumUK Medical Research Council MC_UU_00011/1UK National Institute for Health Research Career Development Fellowship CDF-2014-07-037Wellcome Trust 106865/Z/15/ZWellcome Trust 205039/Z/16/Z
6 · The paper itself

Abstract

backgroundEpidemiological studies indicate that gene-environment interactions play a role in atopic dermatitis (AD).

objectivesTo review the evidence for gene-environment interactions in AD aetiology, focusing on filaggrin (FLG) loss-of-function mutations.

methodsA systematic search from inception to September 2018 in Embase, MEDLINE and BIOSIS was performed. Search terms included all synonyms for AD and filaggrin/FLG; any genetic or epidemiological study design using any statistical methods were included. Quality assessment using criteria modified from guidance (ROBINS-I and Human Genome Epidemiology Network) for nonrandomized and genetic studies was completed, including consideration of power. Heterogeneity of study design and analyses precluded the use of meta-analysis.

resultsOf 1817 papers identified, 12 studies fulfilled the inclusion criteria required and performed formal interaction testing. There was some evidence for FLG-environment interactions in six of the studies (P-value for interaction ≤ 0·05), including early-life cat ownership, older siblings, water hardness, phthalate exposure, higher urinary phthalate metabolite levels (which all increased AD risk additional to FLG null genotype) and prolonged breastfeeding (which decreased AD risk in the context of FLG null genotype). Major limitations of published studies were the low numbers of individuals (ranging from five to 94) with AD and FLG loss-of-function mutations and exposure to specific environmental factors, and variation in exposure definitions.

conclusionsEvidence on FLG-environment interactions in AD aetiology is limited. However, many of the studies lacked large enough sample sizes to assess these interactions fully. Further research is needed with larger sample sizes and clearly defined exposure assessment. Linked Comment: Park and Seo. Br J Dermatol 2020; 183:411.

Indexed as

Dermatitis, AtopicAnimalsCatsEnvironmental ExposureFilaggrin ProteinsGenetic Predisposition to DiseaseGenotypeIntermediate Filament ProteinsLoss of Function MutationMutationFilaggrin ProteinsFLG protein, humanIntermediate Filament Proteins

Identifiers

PMID31794059
PMCPMC7496176
OpenAlexW2994339655

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.