Evidence map›Paper›PMID 17093889›Full record

ArticleJournal of neural transmission (Vienna, Austria : 1996)2007

Family-based association study of serotonergic candidate genes and attention-deficit/hyperactivity disorder in a German sample.

P Heiser, A Dempfle, S Friedel, K Konrad, A Hinney, H Kiefl, S Walitza, T Bettecken, K Saar, M Linder and 5 more

Abstract readMulticenter Study
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In one paragraph

Article in Journal of neural transmission (Vienna, Austria : 1996), 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

16 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Candidate gene associations with withdrawn behavior.Journal of child psychology and psychiatry, and allied disciplines · 2013
    Article
  7. Article
  8. Article
  9. Article
  10. Article
  11. Molecular genetics of attention deficit hyperactivity disorder.The Psychiatric clinics of North America · 2010
    Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Genetic aspects in attention-deficit/hyperactivity disorder.Journal of neural transmission (Vienna, Austria : 1996) · 2008
    Review
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.

P HeiserDepartment of Child and Adolescent Psychiatry and Psychotherapy, Philipps-University, Marburg, Germany.
A Dempfle
S Friedel
K Konrad
A Hinney
H Kiefl
S Walitza
T Bettecken
K Saar
M Linder
A Warnke
B Herpertz-Dahlmann
H Schäfer
H Remschmidt
J Hebebrand

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Alterations in the serotonergic pathway have been implicated in the pathogenesis of attention-deficit/hyperactivity disorder (ADHD). The aim of this study was to investigate seven genetic variants in three genes (serotonin transporter (5-HTT), serotonin receptor 1B (5-HTR1B) and serotonin receptor 2A (5-HTR2A)), which have previously been shown to be associated with ADHD. The polymorphisms under investigation were the 5-HTTLPR, the VNTR in intron 2 and the 3'UTR SNP in 5-HTT, the 5-HTR1B variations 861G>C and 102T>C, and the 5-HTR2A variations His452Tyr and 1438G>A. We genotyped these variants in a sample of 102 families with 229 children with ADHD according to DSM-IV criteria. Among the affected children, 69% fulfilled criteria for the combined type, 27% for the predominantly inattentive type, and 4% for the predominantly hyperactive-impulsive type. Associations were tested by the pedigree transmission disequilibrium test (PDT). All investigated polymorphisms in serotonergic candidate genes showed no association to ADHD in our sample. Earlier studies of these polymorphisms had also shown inconsistent results, with some studies reporting significant associations and others demonstrating no association. This discordance between studies may reflect variation in patient ascertainment criteria, genetic heterogeneity, too low statistical power for the expected effects or false positive results in the initial reports. We cannot rule out the possibility that other variations in the investigated genes contribute to the etiology of ADHD.

Indexed as

Genetic Predisposition to DiseaseAdultAttention Deficit Disorder with HyperactivityChildFemaleGermanyHumansMalePedigreePolymerase Chain ReactionPolymorphism, Single NucleotideReceptor, Serotonin, 5-HT1BReceptor, Serotonin, 5-HT2ASerotoninSerotonin Plasma Membrane Transport ProteinsReceptor, Serotonin, 5-HT1BReceptor, Serotonin, 5-HT2ASerotoninSerotonin Plasma Membrane Transport ProteinsSLC6A4 protein, human

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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.