Evidence map›Paper›PMID 21070631›Full record

ArticleBMC medical genetics2010

The dopamine β-hydroxylase -1021C/T polymorphism is associated with the risk of Alzheimer's disease in the Epistasis Project.

Onofre Combarros, Donald R Warden, Naomi Hammond, Mario Cortina-Borja, Olivia Belbin, Michael G Lehmann, Gordon K Wilcock, Kristelle Brown, Patrick G Kehoe, Rachel Barber and 17 more

Open access · goldAbstract read
In one paragraph

Article in BMC medical genetics, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed, 2 pooled it
1.4field-weighted citation impact, top 23% 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

31 citing papers in PubMed, 2 syntheses or guidelines pooled it, 58 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Associations Between Dopamine Beta-Hydroxylase Gene Polymorphisms and Restless Legs Syndrome: A Case-Control Study.Medical science monitor : international medical journal of experimental and clinical research · 2025
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  14. Evolutionary footprint of epistasis.PLoS computational biology · 2018
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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

27 authors at 13 institutions in 4 countries.

Onofre CombarrosNeurology Service and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas, Marqués de Valdecilla University Hospital (University of Cantabria), 39008 Santander, Spain. combarro@unican.es
Donald R Warden
Naomi Hammond
Mario Cortina-Borja
Olivia Belbin
Michael G Lehmann
Gordon K Wilcock
Kristelle Brown
Patrick G Kehoe
Rachel Barber
Eliecer Coto
Victoria Alvarez
Panos Deloukas
Rhian Gwilliam
Reinhard Heun
Heike Kölsch
Ignacio Mateo
Abderrahim Oulhaj
Alejandro Arias-Vásquez
Maaike Schuur
Yurii S Aulchenko
M Arfan Ikram
Monique M Breteler
Cornelia M van Duijn
Kevin Morgan
A David Smith
Donald J Lehmann
Erasmus University Rotterdam · NLUniversity of Nottingham · GBWellcome Sanger Institute · GBErasmus MC · NLFrenchay Hospital · GBHospital Universitario Central de Asturias · ESJohn Radcliffe Hospital · GBBiomedical Research Networking Center on Neurodegenerative Diseases · ESMarqués de Valdecilla University Hospital · ESRadboud University Nijmegen · NLRoyal Derby Hospital · GBUniversity College London · GBUniversity of Bonn · DE

Funding

Medical Research Council G0400546
6 · The paper itself

Abstract

backgroundThe loss of noradrenergic neurones of the locus coeruleus is a major feature of Alzheimer's disease (AD). Dopamine β-hydroxylase (DBH) catalyses the conversion of dopamine to noradrenaline. Interactions have been reported between the low-activity -1021T allele (rs1611115) of DBH and polymorphisms of the pro-inflammatory cytokine genes, IL1A and IL6, contributing to the risk of AD. We therefore examined the associations with AD of the DBH -1021T allele and of the above interactions in the Epistasis Project, with 1757 cases of AD and 6294 elderly controls.

methodsWe genotyped eight single nucleotide polymorphisms (SNPs) in the three genes, DBH, IL1A and IL6. We used logistic regression models and synergy factor analysis to examine potential interactions and associations with AD.

resultsWe found that the presence of the -1021T allele was associated with AD: odds ratio = 1.2 (95% confidence interval: 1.06-1.4, p = 0.005). This association was nearly restricted to men < 75 years old: odds ratio = 2.2 (1.4-3.3, 0.0004). We also found an interaction between the presence of DBH -1021T and the -889TT genotype (rs1800587) of IL1A: synergy factor = 1.9 (1.2-3.1, 0.005). All these results were consistent between North Europe and North Spain.

conclusionsExtensive, previous evidence (reviewed here) indicates an important role for noradrenaline in the control of inflammation in the brain. Thus, the -1021T allele with presumed low activity may be associated with misregulation of inflammation, which could contribute to the onset of AD. We suggest that such misregulation is the predominant mechanism of the association we report here.

Indexed as

Polymorphism, Single NucleotideAgedAlzheimer DiseaseDopamine beta-HydroxylaseEpistasis, GeneticEuropeFemaleGenotypeHumansInterleukin-1alphaInterleukin-6Locus CoeruleusMaleNeuronsOdds RatioRisk FactorsDopamine beta-HydroxylaseIL1A protein, humanInterleukin-1alphaInterleukin-6

Identifiers

PMID21070631
PMCPMC2994840
OpenAlexW2122103325

What OpenQuestion holds

Textmetadata
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.