Evidence map›Paper›PMID 26134309›Full record

SynthesisCellular and molecular neurobiology2016

Brain-Derived Neurotrophic Factor Gene Val66Met Polymorphism and Risk of Schizophrenia: A Meta-analysis of Case-Control Studies.

Majid Kheirollahi, Elahe Kazemi, Saeideh Ashouri

Open access · greenAbstract readMeta-Analysis
In one paragraph

Synthesis in Cellular and molecular neurobiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
3.1field-weighted citation impact, top 9% 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 50 citations in OpenAlex.

  1. Pooled it
  2. Schizophrenia: from mechanism to therapy.Science China. Life sciences · 2026
    Review
  3. BDNF: New Views of an Old Player in Traumatic Brain Injury.The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry · 2024
    Review
  4. Article
  5. Biomedicines · 2023
    Article
  6. Association Study ofJournal of personalized medicine · 2023
    Article
  7. Article
  8. Review
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Review
  15. Article
  16. Critical Issues inFrontiers in molecular neuroscience · 2018
    Review
  17. Glioma in Schizophrenia: Is the Risk Higher or Lower?Frontiers in cellular neuroscience · 2018
    Review
  18. Review
  19. Brain-derived neurotrophic factor and schizophrenia.The mental health clinician · 2016
    Article
  20. 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

3 authors at 1 institution in 1 country.

Majid KheirollahiPediatric Inherited Diseases Research Center, Research Institute for Primordial Prevention of Non-communicable Disease and Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, P.O. Box: 81746-73461, Isfahan, Iran. mkheirollahi@med.mui.ac.ir.
Elahe KazemiPediatric Inherited Diseases Research Center, Research Institute for Primordial Prevention of Non-communicable Disease and Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, P.O. Box: 81746-73461, Isfahan, Iran. kazemielahe89@yahoo.com.
Saeideh AshouriPediatric Inherited Diseases Research Center, Research Institute for Primordial Prevention of Non-communicable Disease and Department of Genetics and Molecular Biology, School of Medicine, Isfahan University of Medical Sciences, P.O. Box: 81746-73461, Isfahan, Iran. saeede_ashoori@yahoo.com.
Isfahan University of Medical Sciences · IR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

According to evidences from previous family and association studies, it has been claimed that genetic factors are involved in the neuropathogenesis of Schizophrenia disorder. Whether the Val66Met variant of brain-derived neurotrophic factor (BDNF) gene plays any roles in the pathogenesis of this syndrome or could be a potential biomarker for prognosis of this disorder has been a long-standing controversial issue. We performed a meta-analysis restricted to case-control studies and searched Pubmed, PsychInfo, and Google scholar using keywords including 'association,' 'Val66Met,' 'BDNF,' and 'schizophrenia' published up to May 1, 2015. A total of 39 studies for schizophrenia were combined by fixed- and random-effects models. The pooled results from the schizophrenia sample indicated no significant evidence for the association of Val/Val and Val/Met genotypes of BDNF gene with schizophrenia, but it was observed that there is an association between Met/Met polymorphism and schizophrenia in Asian, European, and Chinese populations, this means that the risk of schizophrenia in Asian, European, and Chinese populations with Met/Met genotype is, respectively, 9, 26, and 9%. There was a significant association between BDNF Val66Met polymorphism and schizophrenia in our meta-analysis study. We cannot rule out the possibility that other polymorphisms in the BDNF gene are involved in the pathophysiology of schizophrenia. In addition, more studies should be conducted on the polymorphisms in other genes to elucidate their possible roles in schizophrenia.

Indexed as

Genetic Predisposition to DiseaseBrain-Derived Neurotrophic FactorCase-Control StudiesEthnicityGene FrequencyHumansPolymorphism, Single NucleotidePublication BiasSchizophreniaBDNF protein, humanBrain-Derived Neurotrophic FactorBDNFMeta-analysisSchizophreniaVal66Met polymorphism

Identifiers

PMID26134309
PMCPMC11482494
OpenAlexW803719727

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.