Evidence map›Paper›PMID 18049818›Full record

ArticleImmunogenetics2007

Trans-species polymorphism and evidence of selection on class II MHC loci in tuco-tucos (Rodentia: Ctenomyidae).

Ana Paula Cutrera, Eileen A Lacey

Abstract readComparative Study
PubMed Publisher
In one paragraph

Article in Immunogenetics, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
1.6field-weighted citation impact, top 15% 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

25 citing papers in PubMed, 57 citations in OpenAlex.

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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

2 authors at 2 institutions in 2 countries.

Ana Paula CutreraLaboratorio de Ecofisiología, Departamento de Biología, Universidad Nacional de Mar del Plata, C.C. 1245, Mar del Plata, Argentina. acutrera@mdp.edu.ar
Eileen A Lacey
Museum of Vertebrate Zoology · USNational University of Mar del Plata · AR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Balancing selection acting over the evolutionary history of a lineage can result in the retention of alleles among species for longer than expected under neutral evolution. The associated pattern of trans-species polymorphism, in which similar or even identical alleles are shared among species, is often used to infer that balancing selection has occurred. The genes of the major histocompatibility complex (MHC) are thought to be subject to balancing selection that maintains alleles associated with response to specific pathogens. To explore the role of balancing selection in shaping MHC diversity in ctenomyid rodents, we examined allelic variability at the class II DRB and DQA loci in 18 species in the genus Ctenomys. Previous studies of four of these species had revealed significant within-population evidence of positive selection on MHC loci. The current study expands upon these analyses to (1) evaluate among-species evidence of positive selection and (2) explore the potential for balancing selection on MHC genes. Interspecific nucleotide sequence variation revealed significant evidence of positive selection on the DRB and DQA loci. At the same time, comparisons of phylogenetic trees for these MHC loci with a putative species tree based on mitochondrial sequence data revealed multiple examples of trans-specific polymorphism, including sharing of identical DRB and DQA alleles among distantly related species of Ctenomys. These findings suggest that MHC genes in these animals have historically been subject to balancing selection and yield new insights into the complex suite of forces shaping MHC diversity in free-living vertebrates.

Indexed as

Polymorphism, GeneticSelection, GeneticAnimalsArgentinaEvolution, MolecularGenes, MHC Class IIGenetic VariationHLA-DQ alpha-ChainsHLA-DQ AntigensHLA-DQ beta-ChainsHLA-DR AntigensLiverPhylogenyRodentiaHLA-DQA1 antigenHLA-DQ alpha-ChainsHLA-DQ AntigensHLA-DQbeta antigenHLA-DQ beta-ChainsHLA-DR Antigens

Identifiers

PMID18049818
OpenAlexW2034499746

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.