Evidence map›Paper›PMID 25531449›Full record

ArticleNeuro-degenerative diseases2015

Is schizophrenia a neurodegenerative disease? Evidence from age-related decline of brain-derived neurotrophic factor in the brains of schizophrenia patients and matched nonpsychiatric controls.

Jagadeesh Rao, Joshua Chiappelli, Peter Kochunov, William T Regenold, Stanley I Rapoport, L Elliot Hong

Open access · greenAbstract read
In one paragraph

Article in Neuro-degenerative diseases, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed
1.9field-weighted citation impact, top 16% 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

14 citing papers in PubMed, 36 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Suicide and Schizophrenia: an Interplay of Factors.Current psychiatry reports · 2020
    Review
  7. Article
  8. Dietary Gluten and Neurodegeneration: A Case for Preclinical Studies.International journal of molecular sciences · 2020
    Review
  9. Article
  10. Review
  11. Article
  12. Article
  13. Article
  14. 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

6 authors at 2 institutions in 1 country.

Jagadeesh RaoBrain Physiology and Metabolism Section, Laboratory of Neurosciences, National Institute on Aging, National Institutes of Health, Bethesda, Md., USA.
Joshua Chiappelli
Peter Kochunov
William T Regenold
Stanley I Rapoport
L Elliot Hong
National Institute on Aging · USUniversity of Maryland, Baltimore · US

Funding

The Effects of Kynurenine Aminotransferase Inhibition in People with SchizophreniaP50MH103222 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI SCHWARCZ, ROBERT · 2014 to 2023
$25.2M
SOLAR-Eclipse Computational Tools for Imaging GeneticsR01EB015611 · NIBIB · UNIVERSITY OF TEXAS HLTH SCI CTR HOUSTON · PI KOCHUNOV, PETER V. · 2012 to 2024
$5.0M
Shared Neural Circuitry in Comorbid Schizophrenia and Nicotine AddictionR01DA027680 · NIDA · UNIVERSITY OF MARYLAND BALTIMORE · PI HONG, L ELLIOT ELLIOT · 2010 to 2014
$2.4M
Neural Oscillatory Biomarkers for Genetics and Animal Models of SchizophreniaR01MH085646 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI HONG, L ELLIOT ELLIOT · 2010 to 2013
$2.2M
Identifying molecular path of behavioural phenotype in schizophreniaR21MH079172 · NIMH · UNIVERSITY OF MARYLAND BALTIMORE · PI HONG, L ELLIOT ELLIOT · 2007 to 2008
$384k
Intramural NIH HHSNIBIB NIH HHS R01 EB015611NIDA NIH HHS R01 DA027680NIMH NIH HHS P50MH10322NIMH NIH HHS P50 MH103222NIMH NIH HHS R01 MH085646NIMH NIH HHS R01MH085646NIMH NIH HHS R21 MH079172NIMH NIH HHS R21MH079172
6 · The paper itself

Abstract

backgroundBrain-derived neurotrophic factor (BDNF) protein levels decline in the brain during senescence and are also shown to be reduced in schizophrenia patients. BDNF is present in both the gray and white matters of the brain. It is unclear whether BDNF abnormalities in schizophrenia are specific to gray and/or white matter.

objectiveWe hypothesized that the age-related BDNF decline is abnormal and contributes to the reduced BDNF in schizophrenia.

methodsWe tested this hypothesis by measuring BDNF protein levels in postmortem gray and white matter, using the prefrontal cortex (PFC) and the genu of the corpus callosum as regions of interests, from 20 schizophrenia patients and 20 matched nonpsychiatric controls. Samples were selected across the adult lifespan--from 20 to 80 years of age.

resultsPFC gray matter BDNF protein levels were significantly lower in older age in both nonpsychiatric comparisons and patients, while BDNF in white matter did not decrease significantly with age in either group. PFC BDNF was linearly lower from 20 to 80 years of age in nonpsychiatric comparisons. In schizophrenia, the age effect was similarly linear in younger patients but a decline did not occur in older patients.

conclusionPFC BDNF does not follow a normative linear age effect in schizophrenia patients as they grow older, which may represent a 'floor effect' due to earlier decline or a survivor cohort of older patient donors who are less susceptible to a schizophrenia-related pathological aging process.

Indexed as

AdultAgedAged, 80 and overAgingAutopsyBrainBrain-Derived Neurotrophic FactorCase-Control StudiesCorpus CallosumDiagnosis, DifferentialFemaleGray MatterHumansMaleMiddle AgedNeurodegenerative DiseasesBDNF protein, humanBrain-Derived Neurotrophic Factor

Identifiers

PMID25531449
PMCPMC4348338
OpenAlexW1992824344

What OpenQuestion holds

Textmetadata
LicenceTDM
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.