Evidence map›Paper›PMID 29494662›Full record

ArticlePloS one2018

Combined effect of glutamine at position 70 of HLA-DRB1 and alanine at position 57 of HLA-DQB1 in type 1 diabetes: An epitope analysis.

Petroula Gerasimou, Vicky Nicolaidou, Nicos Skordis, Michalis Picolos, Demetrios Monos, Paul A Costeas

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
0.9field-weighted citation impact, top 22% 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

13 citing papers in PubMed, 16 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

6 authors at 3 institutions in 2 countries.

Petroula GerasimouKaraiskakio Foundation, Nicosia, Cyprus.ORCID 0000-0001-8970-9056
Vicky NicolaidouDepartment of Life and Health Sciences, School of Sciences and Engineering, University of Nicosia, Nicosia Cyprus.
Nicos SkordisDivision of Paediatric Endocrinology, Paedi Centre for Specialized Paediatrics, Nicosia, Cyprus.
Michalis PicolosAlithia Endocrinology Centre, Nicosia, Cyprus.
Demetrios MonosDepartment of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania, United States of America.
Paul A CosteasKaraiskakio Foundation, Nicosia, Cyprus.ORCID 0000-0002-7257-4746
Children's Hospital of Philadelphia · USUniversity of Cyprus · CYUniversity of Nicosia · CY

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The contribution of specific HLA Class II alleles in type 1 diabetes is determined by polymorphic amino acid epitopes that direct antigen binding therefore, along with conventional allele frequency analysis, epitope analysis can provide important insights into disease susceptibility. We analyzed the highly heterogeneous Cypriot population for the HLA class II loci of T1DM patients and controls and we report for the first time their allele frequencies. Within our patient cohort we identified a subgroup that did not carry the DRB1*03:01-DQA1*05:01-DQB1*02:01 and DRB1*04:xx-DQA1*03:01-DQB1*03:02 risk haplotypes but a novel recombinant one, DRB1*04:XX-DQA1*03:01-DQB1*02:01 designated DR4-DQ2.3. Through epitope analysis we identified established susceptibility (DQB1 A57, DRB1 H13) and resistance (DQB1 D57) residues as well as other novel susceptibility residues DRB1 Q70, DQB1 L26 and resistance residues DRB1 D70, R70 and DQB1 Y47. Prevalence of susceptibility epitopes was higher in patients and was not exclusively a result of linkage disequilibrium. Residues DRB1 Q70, DQB1 L26 and A57 and a 10 amino acid epitope of DQA1 were the most significant in discriminating risk alleles. An extended haplotype containing these epitopes was carried by 92% of our patient cohort. Sharing of susceptibility epitopes could also explain the absence of risk haplotypes in patients. Finally, many significantly associated epitopes were non-pocket residues suggesting that critical immune functions may exist spanning further from the binding pockets.

Indexed as

Age of OnsetAlanineBinding SitesCohort StudiesCyprusDiabetes Mellitus, Type 1Epitope MappingFemaleGene FrequencyGenetic Predisposition to DiseaseGlutamineHaplotypesHLA-DQ beta-ChainsHLA-DRB1 ChainsHumansLinkage DisequilibriumAlanineGlutamineHLA-DQB1 antigenHLA-DQ beta-ChainsHLA-DRB1 Chains

Identifiers

PMID29494662
PMCPMC5832312
OpenAlexW2793201967

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Registered trials

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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.