Evidence map›Paper›PMID 27678121›Full record

ArticleGenome biology and evolution2016

Atopic Dermatitis Susceptibility Variants in Filaggrin Hitchhike Hornerin Selective Sweep.

Muthukrishnan Eaaswarkhanth, Duo Xu, Colin Flanagan, Margarita Rzhetskaya, M Geoffrey Hayes, Ran Blekhman, Nina G Jablonski, Omer Gokcumen

Open access · goldAbstract read
In one paragraph

Article in Genome biology and evolution, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
7.1field-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

22 citing papers in PubMed, 42 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Review
  5. Article
  6. Review
  7. FLG Variation Differs between European Americans and African Americans.The Journal of investigative dermatology · 2021
    Observational
  8. Article
  9. Evolutionary context of psoriatic immune skin response.Evolution, medicine, and public health · 2021
    Article
  10. Article
  11. Observational
  12. Filaggrin sequencing and bioinformatics tools.Archives of dermatological research · 2020
    Article
  13. Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Recent evolution of the human skin barrier.Experimental dermatology · 2018
    Review
  19. Article
  20. Article
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

8 authors at 4 institutions in 1 country.

Muthukrishnan EaaswarkhanthDepartment of Biological Sciences, University at Buffalo, The State University of New York at Buffalo, Buffalo, NY.
Duo XuDepartment of Biological Sciences, University at Buffalo, The State University of New York at Buffalo, Buffalo, NY.
Colin FlanaganDepartment of Biological Sciences, University at Buffalo, The State University of New York at Buffalo, Buffalo, NY.
Margarita RzhetskayaDivision of Endocrinology, Metabolism and Molecular Medicine, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL.
M Geoffrey HayesDivision of Endocrinology, Metabolism and Molecular Medicine, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL.
Ran BlekhmanDepartment of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN.
Nina G JablonskiDepartment of Anthropology, Pennsylvania State University, University Park, PA.
Omer GokcumenDepartment of Biological Sciences, University at Buffalo, The State University of New York at Buffalo, Buffalo, NY omergokc@buffalo.edu.
University at Buffalo, State University of New York · USNorthwestern University · USPennsylvania State University · USUniversity of Minnesota · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Human skin has evolved rapidly, leaving evolutionary signatures in the genome. The filaggrin (FLG) gene is widely studied for its skin-barrier function in humans. The extensive genetic variation in this gene, especially common loss-of-function (LoF) mutations, has been established as primary risk factors for atopic dermatitis. To investigate the evolution of this gene, we analyzed 2,504 human genomes and genotyped the copy number variation of filaggrin repeats within FLG in 126 individuals from diverse ancestral backgrounds. We were unable to replicate a recent study claiming that LoF of FLG is adaptive in northern latitudes with lower ultraviolet light exposure. Instead, we present multiple lines of evidence suggesting that FLG genetic variation, including LoF variants, have little or no effect on fitness in modern humans. Haplotype-level scrutinization of the locus revealed signatures of a recent selective sweep in Asia, which increased the allele frequency of a haplotype group (Huxian haplogroup) in Asian populations. Functionally, we found that the Huxian haplogroup carries dozens of functional variants in FLG and hornerin (HRNR) genes, including those that are associated with atopic dermatitis susceptibility, HRNR expression levels and microbiome diversity on the skin. Our results suggest that the target of the adaptive sweep is HRNR gene function, and the functional FLG variants that involve susceptibility to atopic dermatitis, seem to hitchhike the selective sweep on HRNR. Our study presents a novel case of a locus that harbors clinically relevant common genetic variation with complex evolutionary trajectories.

Indexed as

DNA Copy Number VariationsSelection, GeneticCalcium-Binding ProteinsDermatitis, AtopicEvolution, MolecularFilaggrin ProteinsGene FrequencyGenetic Predisposition to DiseaseHaplotypesHumansIntermediate Filament ProteinsCalcium-Binding ProteinsFilaggrin ProteinsFLG protein, humanHRNR protein, humanIntermediate Filament Proteinscopy number variationpositive selectionskin evolutionstructural variantstandem repeats

Identifiers

PMID27678121
PMCPMC5174745
OpenAlexW2525608899

What OpenQuestion holds

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LicenceCC BY-NC
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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.