Evidence map›Paper›PMID 21387465›Full record

ArticleHuman mutation2011

A worldwide analysis of beta-defensin copy number variation suggests recent selection of a high-expressing DEFB103 gene copy in East Asia.

Robert J Hardwick, Lee R Machado, Luciana W Zuccherato, Suzanne Antolinos, Yali Xue, Nyambura Shawa, Robert H Gilman, Lilia Cabrera, Douglas E Berg, Chris Tyler-Smith and 3 more

Open access · greenAbstract read
In one paragraph

Article in Human mutation, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
6.8field-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

47 citing papers in PubMed, 75 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Human-specific gene expansions contribute to brain evolution.bioRxiv : the preprint server for biology · 2025
    Article
  5. Article
  6. Copy Number Variation in Asthma: An Integrative Review.Clinical reviews in allergy & immunology · 2025
    Review
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  8. Article
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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 at 7 institutions in 5 countries.

Robert J HardwickDepartment of Genetics, University of Leicester, University Road, Leicester, United Kingdom.
Lee R Machado
Luciana W Zuccherato
Suzanne Antolinos
Yali Xue
Nyambura Shawa
Robert H Gilman
Lilia Cabrera
Douglas E Berg
Chris Tyler-Smith
Paul Kelly
Eduardo Tarazona-Santos
Edward J Hollox
University of Leicester · GBQueen Mary University of London · GBUniversidade Federal de Minas Gerais · BRWellcome Sanger Institute · GBJohns Hopkins University · USPrisma · PEWashington University in St. Louis · US

Funding

Medical Research Council G0801123Medical Research Council GO801123Wellcome Trust 067948Wellcome Trust 077009Wellcome Trust 087663
6 · The paper itself

Abstract

Beta-defensins are a family of multifunctional genes with roles in defense against pathogens, reproduction, and pigmentation. In humans, six beta-defensin genes are clustered in a repeated region which is copy-number variable (CNV) as a block, with a diploid copy number between 1 and 12. The role in host defense makes the evolutionary history of this CNV particularly interesting, because morbidity due to infectious disease is likely to have been an important selective force in human evolution, and to have varied between geographical locations. Here, we show CNV of the beta-defensin region in chimpanzees, and identify a beta-defensin block in the human lineage that contains rapidly evolving noncoding regulatory sequences. We also show that variation at one of these rapidly evolving sequences affects expression levels and cytokine responsiveness of DEFB103, a key inhibitor of influenza virus fusion at the cell surface. A worldwide analysis of beta-defensin CNV in 67 populations shows an unusually high frequency of high-DEFB103-expressing copies in East Asia, the geographical origin of historical and modern influenza epidemics, possibly as a result of selection for increased resistance to influenza in this region.

Indexed as

Evolution, MolecularAnimalsAsia, Easternbeta-DefensinsDNA Copy Number VariationsGene ExpressionHumansInfluenza, HumanMultigene FamilyOrthomyxoviridaePan troglodytesPhylogeographySelection, Geneticbeta-Defensins

Identifiers

PMID21387465
PMCPMC3263423
OpenAlexW2081856897

What OpenQuestion holds

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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.