Evidence map›Paper›PMID 15940292›Full record

ArticleMolecular psychiatry2005

Association of the paternally transmitted copy of common Valine allele of the Val66Met polymorphism of the brain-derived neurotrophic factor (BDNF) gene with susceptibility to ADHD.

L Kent, E Green, Z Hawi, A Kirley, F Dudbridge, N Lowe, R Raybould, K Langley, N Bray, M Fitzgerald and 5 more

Abstract read
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In one paragraph

Article in Molecular psychiatry, 2005. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers, 3 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed, 3 pooled it
6.6field-weighted citation impact, top 3% 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

38 citing papers in PubMed, 3 syntheses or guidelines pooled it, 123 citations in OpenAlex.

  1. Evaluation of the Relationship BetweenFrontiers in psychiatry · 2022
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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

15 authors at 4 institutions in 2 countries.

L KentDevelopmental Psychiatry, University of Cambridge, Cambridge, UK. lk255@cam.ac.uk
E Green
Z Hawi
A Kirley
F Dudbridge
N Lowe
R Raybould
K Langley
N Bray
M Fitzgerald
M J Owen
M C O'Donovan
M Gill
A Thapar
N Craddock
Cardiff University · GBTrinity College Dublin · IEGenomics (United Kingdom) · GBUniversity of Cambridge · GB

Funding

Wellcome Trust
6 · The paper itself

Abstract

Attention deficit hyperactivity disorder (ADHD) is a common, highly heritable, neurodevelopmental disorder with onset in early childhood. Genes involved in neuronal development and growth are, thus, important etiological candidates and brain-derived neurotrophic factor (BDNF), has been hypothesized to play a role in the pathogenesis of ADHD. BDNF is a member of the neurotrophin family and is involved in the survival and differentiation of dopaminergic neurons in the developing brain (of relevance because drugs that block the dopamine transporter can be effective therapeutically). The common Val66Met functional polymorphism in the human BDNF gene (rs 6265) was genotyped in a collaborative family-based sample of 341 white UK or Irish ADHD probands and their parents. We found evidence for preferential transmission of the valine (G) allele of BDNF (odds ratio, OR=1.6, P=0.02) with a strong paternal effect (paternal transmissions: OR=3.2, P=0.0005; maternal transmissions: OR=1.00; P=1.00). Our findings support the hypothesis that BDNF is involved in the pathogenesis of ADHD. The transmission difference between parents raises the possibility that an epigenetic process may be involved.

Indexed as

Polymorphism, Single NucleotideAmino Acid SubstitutionAttention Deficit Disorder with HyperactivityBase SequenceBrain-Derived Neurotrophic FactorDNA PrimersFemaleGenetic Predisposition to DiseaseHumansMaleMethionineMolecular Sequence DataNuclear FamilyValineBrain-Derived Neurotrophic FactorDNA PrimersMethionineValine

Identifiers

PMID15940292
OpenAlexW2120195418

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.