Evidence map›Paper›PMID 23815974›Full record

ArticleSchizophrenia research2013

Histone methylation at H3K9: evidence for a restrictive epigenome in schizophrenia.

Kayla A Chase, David P Gavin, Alessandro Guidotti, Rajiv P Sharma

Abstract read
In one paragraph

Article in Schizophrenia research, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed, 1 pooled it
4.3field-weighted citation impact, top 5% 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

53 citing papers in PubMed, 1 synthesis or guideline pooled it, 104 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Review
  4. Article
  5. Review
  6. Article
  7. Review
  8. Review
  9. Chromatin modifiers in neurodevelopment.Frontiers in molecular neuroscience · 2025
    Review
  10. Review
  11. Epigenetic Control in Schizophrenia.Sub-cellular biochemistry · 2025
    Review
  12. Review
  13. Article
  14. Review
  15. Review
  16. Methylome-wide Association Study of Patients with Recent-onset Psychosis.Clinical psychopharmacology and neuroscience : the official scientific journal of the Korean College of Neuropsychopharmacology · 2022
    Article
  17. Review
  18. Article
  19. 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

4 authors at 2 institutions in 1 country.

Kayla A ChaseThe Psychiatric Institute, University of Illinois at Chicago, 1601 W. Taylor St., Chicago, IL 60612, United States.
David P Gavin
Alessandro Guidotti
Rajiv P Sharma
University of Illinois Chicago · USJesse Brown VA Medical Center · US

Funding

The H3K9 HISTONE SWITCH; 'LEVELS' IN SCHIZOPHRENIA BLOOD AND BRAINR01MH094358 · NIMH · UNIVERSITY OF ILLINOIS AT CHICAGO · PI SHARMA, RAJIV PANDIT · 2012 to 2016
$2.3M
Nicotinic receptor stimulation and epigenetic regulation of GABAergic function.R01MH093348 · NIMH · UNIVERSITY OF ILLINOIS AT CHICAGO · PI GUIDOTTI, ALESSANDRO · 2011 to 2015
$1.9M
NIMH NIH HHS R01 MH093348NIMH NIH HHS R01 MH094358
6 · The paper itself

Abstract

objectiveEpigenetic changes are stable and long-lasting chromatin modifications that regulate genomewide and local gene activity. The addition of two methyl groups to the 9th lysine of histone 3 (H3K9me2) by histone methyltransferases (HMT) leads to a restrictive chromatin state, and thus reduced levels of gene transcription. Given the numerous reports of transcriptional down-regulation of candidate genes in schizophrenia, we tested the hypothesis that this illness can be characterized by a restrictive epigenome.

methodsWe obtained parietal cortical samples from the Stanley Foundation Neuropathology Consortium and lymphocyte samples from the University of Illinois at Chicago (UIC). In both tissues we measured mRNA expression of HMTs GLP, SETDB1 and G9a via real-time RT-PCR and H3K9me2 levels via western blot. Clinical rating scales were obtained from the UIC cohort.

resultsA diagnosis of schizophrenia is a significant predictor for increased GLP, SETDB1 mRNA expression and H3K9me2 levels in both postmortem brain and lymphocyte samples. G9a mRNA is significantly increased in the UIC lymphocyte samples as well. Increased HMT mRNA expression is associated with worsening of specific symptoms, longer durations of illness and a family history of schizophrenia.

conclusionsThese data support the hypothesis of a restrictive epigenome in schizophrenia, and may associate with symptoms that are notoriously treatment resistant. The histone methyltransferases measured here are potential future therapeutic targets for small molecule pharmacology, and better patient prognosis.

Indexed as

AdultCerebral CortexEpigenomicsFemaleGene Expression RegulationHistone-Lysine N-MethyltransferaseHistonesHumansLinear ModelsLymphocytesLysineMaleMethylationMiddle AgedPostmortem ChangesProtein MethyltransferasesEHMT1 protein, humanHistone-Lysine N-MethyltransferaseHistonesLysineProtein MethyltransferasesRNA, MessengerSETDB1 protein, humanChromatinEpigeneticsHistone methylationLymphocytePostmortem BrainSchizophrenia

Identifiers

PMID23815974
PMCPMC3779891
OpenAlexW1967050451

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.