Evidence map›Paper›PMID 29732726›Full record

ArticleArthritis & rheumatology (Hoboken, N.J.)2018

Functional Characterization of the Osteoarthritis Genetic Risk Residing at ALDH1A2 Identifies rs12915901 as a Key Target Variant.

Colin Shepherd, Dongxing Zhu, Andrew J Skelton, Jennifer Combe, Harrison Threadgold, Linyi Zhu, Tonia L Vincent, Paul Stuart, Louise N Reynard, John Loughlin

Open access · hybridAbstract read
In one paragraph

Article in Arthritis & rheumatology (Hoboken, N.J.), 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 4 pooled it
4.7field-weighted citation impact, top 5% 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

29 citing papers in PubMed, 4 syntheses or guidelines pooled it, 54 citations in OpenAlex.

  1. Pooled it
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  14. A Functional Polymorphism Downstream of Vitamin A Regulator GeneInternational journal of molecular sciences · 2023
    Article
  15. Article
  16. Article
  17. Genetics of osteoarthritis.Osteoarthritis and cartilage · 2022
    Review
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  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 2 countries.

Colin ShepherdNewcastle University, Newcastle upon Tyne, UK.ORCID 0000-0003-3334-3379
Dongxing ZhuNewcastle University, Newcastle upon Tyne, UK, and Guangzhou Institute of Cardiovascular Disease, The Second Affiliated Hospital, and Guangzhou Medical University, Guangzhou, China.
Andrew J SkeltonNewcastle University, Newcastle upon Tyne, UK.
Jennifer CombeNewcastle University, Newcastle upon Tyne, UK.
Harrison ThreadgoldNewcastle University, Newcastle upon Tyne, UK.
Linyi ZhuArthritis Research UK Centre for OA Pathogenesis, University of Oxford, Oxford, UK.
Tonia L VincentArthritis Research UK Centre for OA Pathogenesis, University of Oxford, Oxford, UK.
Paul StuartNewcastle University Teaching Hospitals NHS Trust, Freeman Hospital, Newcastle upon Tyne, UK.
Louise N ReynardNewcastle University, Newcastle upon Tyne, UK.
John LoughlinNewcastle University, Newcastle upon Tyne, UK.
Newcastle University · GBUniversity of Oxford · GBFreeman Hospital · GBSecond Affiliated Hospital of Guangzhou Medical University · CN

Funding

Arthritis Research UK 20205Arthritis Research UK 20771Department of HealthMedical Research Council MR/P020941/1Versus Arthritis 20771
6 · The paper itself

Abstract

objectiveTo identify the functional single-nucleotide polymorphisms (SNPs) and mechanisms conferring increased risk of hand osteoarthritis (OA) at the ALDH1A2 locus, which is a retinoic acid regulatory gene.

methodsTissue samples from 247 patients with knee, hip, or hand OA who had undergone joint surgery were included. RNA-sequencing analysis was used to investigate differential expression of ALDH1A2 and other retinoic acid signaling pathway genes in cartilage. Expression of ALDH1A2 in joint tissues obtained from multiple sites was quantified using quantitative reverse transcription-polymerase chain reaction. Allelic expression imbalance (AEI) was measured by pyrosequencing. The consequences of ALDH1A2 depletion by RNA interference were assessed in primary human chondrocytes. In silico and in vitro analyses were used to pinpoint which, among 62 highly correlated SNPs, could account for the association at the locus.

resultsALDH1A2 expression was observed across multiple joint tissue samples, including osteochondral tissue from the hand. The expression of ALDH1A2 and of several retinoic acid signaling genes was different in diseased cartilage compared to non-diseased cartilage, with ALDH1A2 showing lower levels in OA cartilage. Experimental depletion of ALDH1A2 resulted in changes in the expression levels of a number of chondrogenic markers, including SOX9. In addition, reduced expression of the OA risk-conferring allele was witnessed in a number of joint tissues, with the strongest effect in cartilage. The intronic SNP rs12915901 recapitulated the AEI observed in patient tissues, while the Ets transcription factors were identified as potential mediators of this effect.

conclusionThe ALDH1A2 locus seems to increase the risk of hand OA through decreased expression of ALDH1A2 in joint tissues, with the effect dependent on rs12915901. These findings indicate a mechanism that may now be targeted to modulate OA risk.

Indexed as

Aldehyde Dehydrogenase 1 FamilyAllelesCartilage, ArticularChondrocytesFemaleGene ExpressionGenetic Predisposition to DiseaseHandHumansMaleMiddle AgedOsteoarthritisPolymorphism, Single NucleotideRetinal DehydrogenaseRisk FactorsSignal TransductionAldehyde Dehydrogenase 1 FamilyALDH1A2 protein, humanRetinal Dehydrogenase

Identifiers

PMID29732726
PMCPMC6175168
OpenAlexW2801878099

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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.