Evidence map›Paper›PMID 27381299›Full record

ArticleBrain, behavior, and immunity2016

Histamine regulation of microglia: Gene-environment interaction in the regulation of central nervous system inflammation.

Luciana Frick, Maximiliano Rapanelli, Eeman Abbasi, Hiroshi Ohtsu, Christopher Pittenger

Open access · greenAbstract read
In one paragraph

Article in Brain, behavior, and immunity, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 45 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
45citing papers in PubMed, 2 pooled it
4.5field-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

45 citing papers in PubMed, 2 syntheses or guidelines pooled it, 87 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Neurotransmitter Systems in Alzheimer's Disease.Current issues in molecular biology · 2026
    Review
  4. Article
  5. Article
  6. Bidirectional Interplay Between Microglia and Mast Cells.International journal of molecular sciences · 2025
    Review
  7. Review
  8. Review
  9. Article
  10. Review
  11. Review
  12. Article
  13. Microglia and Brain Disorders: The Role of Vitamin D and Its Receptor.International journal of molecular sciences · 2023
    Review
  14. Review
  15. Article
  16. Article
  17. Article
  18. Review
  19. Review
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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

5 authors at 2 institutions in 2 countries.

Luciana FrickDepartment of Psychiatry, Yale University, New Haven, CT, United States.
Maximiliano RapanelliDepartment of Psychiatry, Yale University, New Haven, CT, United States.
Eeman AbbasiDepartment of Psychiatry, Yale University, New Haven, CT, United States.
Hiroshi OhtsuTohoku University, Graduate School of Engineering, Sendai, Japan.
Christopher PittengerDepartment of Psychiatry, Yale University, New Haven, CT, United States; Department of Psychology, Yale University, New Haven, CT, United States; Child Study Center, Yale University, New Haven, CT, United States; Interdepartmental Neuroscience Program, Yale University, New Haven, CT, United States. Electronic address: christopher.pittenger@yale.edu.
Yale University · USTohoku University · JP

Funding

Yale Clinical and Translational Science Award (U Component)UL1TR001863 · NCATS · YALE UNIVERSITY · PI John H. Krystal, LUCILA OHNO-MACHADO · 2016 to 2026
$102.9M
Pathophysiologically Realistic Mouse Models of Neuropsychiatric Disease: TouretteR01MH091861 · NIMH · YALE UNIVERSITY · PI PITTENGER, CHRISTOPHER JOHN · 2010 to 2014
$2.0M
NCATS NIH HHS UL1 TR001863NIMH NIH HHS R01 MH091861
6 · The paper itself

Abstract

Microglia mediate neuroinflammation and regulate brain development and homeostasis. Microglial abnormalities are implicated in a range of neuropsychiatric pathology, including Tourette syndrome (TS) and autism. Histamine (HA) is both a neurotransmitter and an immune modulator. HA deficiency has been implicated as a rare cause of TS and may contribute to other neuropsychiatric conditions. In vitro studies suggest that HA can regulate microglia, but this has never been explored in vivo. We used immunohistochemistry to examine the effects of HA deficiency in histidine decarboxylase (Hdc) knockout mice and of HA receptor stimulation in wild-type animals. We find HA to regulate microglia in vivo, via the H4 receptor. Chronic HA deficiency in Hdc knockout mice reduces ramifications of microglia in the striatum and (at trend level) in the hypothalamus, but not elsewhere in the brain. Depletion of histaminergic neurons in the hypothalamus has a similar effect. Microglia expressing IGF-1 are particularly reduced, However, the microglial response to challenge with lipopolysacchariade (LPS) is potentiated in Hdc knockout mice. Genetic abnormalities in histaminergic signaling may produce a vulnerability to inflammatory challenge, setting the state for pathogenically dysregulated neuroimmune responses.

Indexed as

Gene-Environment InteractionAnimalsCentral Nervous System DiseasesCorpus StriatumHistamineHistidine DecarboxylaseInflammationInsulin-Like Growth Factor IMiceMice, Inbred C57BLMice, TransgenicMicrogliaReceptors, Histamine H4HistamineHistidine Decarboxylaseinsulin-like growth factor-1, mouseInsulin-Like Growth Factor IReceptors, Histamine H4Basal gangliaH4R receptorIGF-1Lipopolysaccharide

Identifiers

PMID27381299
PMCPMC5012904
OpenAlexW2461704283

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.