Evidence map›Paper›PMID 21947542›Full record

ArticleImmunogenetics2012

Signatures of historical demography and pathogen richness on MHC class I genes.

Nouar Qutob, Francois Balloux, Towfique Raj, Hua Liu, Sophie Marion de Procé, John Trowsdale, Andrea Manica

Abstract read
PubMed Publisher
In one paragraph

Article in Immunogenetics, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
1.4field-weighted citation impact, top 20% 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

16 citing papers in PubMed, 32 citations in OpenAlex.

  1. Article
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  5. Population Genetics and Natural Selection in Rheumatic Disease.Rheumatic diseases clinics of North America · 2017
    Review
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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

7 authors at 4 institutions in 2 countries.

Nouar QutobDepartment of Zoology, University of Cambridge, Downing Street, Cambridge, CB2 3EJ, UK. nouarqutob@gmail.com
Francois Balloux
Towfique Raj
Hua Liu
Sophie Marion de Procé
John Trowsdale
Andrea Manica
University of Cambridge · GBBrigham and Women's Hospital · USImperial College London · GBUniversity of Edinburgh · GB

Funding

Biotechnology and Biological Sciences Research Council BB/C007123/2Biotechnology and Biological Sciences Research Council BB/H005854/1Biotechnology and Biological Sciences Research Council BB/H008802/1Medical Research Council G0800681Medical Research Council G0901682Medical Research Council G9800943Wellcome Trust RG56540
6 · The paper itself

Abstract

The extreme polymorphism of MHC class I has been argued to be driven by balancing selection from pathogens, with the prediction that populations exposed to a wider variety of diseases should have higher diversity. We assembled a global database of allotype frequencies for MHC class I genes and investigated possible drivers of genetic diversity, measured in different ways. We first looked for a decline in diversity with distance from Africa (a consequence of drift during human expansions) and then investigated the link with pathogen richness once the effect of drift had been corrected for. Using heterozygosity, we recovered a clear decline in diversity from Africa and confirmed the positive relationship between genetic diversity and pathogen richness for all three classical MHC class I genes. However, when we considered a sequence-based measure of genetic diversity, the correlation with geographic distance from Africa vanished for HLA-C, and the correlations with pathogen richness for the three MHC class I genes were much weaker. HLA-C is known to consist of two functional classes of allotypes (classified with respect to the 80th residue), which interact with different KIR receptors. While this separation provided some improvement in the fit between genetic diversity and distance from Africa for one class, much clearer and consistent patterns were recovered when we used the 90th residue to separate HLA-C allotypes into two new classes. This suggests that this residue, which is also involved in the binding of KIR, might have had an important evolutionary role that has been overlooked.

Indexed as

Genes, MHC Class IGenetic VariationSelection, GeneticAllelesDatabases, GeneticDemographyEvolution, MolecularGene FrequencyGenetics, PopulationHLA-B AntigensHLA-C AntigensHost-Pathogen InteractionsHumansRegression AnalysisHLA-B AntigensHLA-C Antigens

Identifiers

PMID21947542
OpenAlexW2091272031

What OpenQuestion holds

Textmetadata
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.