Evidence map›Paper›PMID 24822045›Full record

ArticleFrontiers in synaptic neuroscience2014

D-amino acid oxidase is expressed in the ventral tegmental area and modulates cortical dopamine.

Jill F Betts, Judith V Schweimer, Katherine E Burnham, Philip W J Burnet, Trevor Sharp, Paul J Harrison

Open access · goldAbstract read
In one paragraph

Article in Frontiers in synaptic neuroscience, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
1.4field-weighted citation impact, top 21% 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

7 citing papers in PubMed, 1 synthesis or guideline pooled it, 15 citations in OpenAlex.

  1. Pooled it
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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

6 authors at 1 institution in 1 country.

Jill F BettsDepartment of Psychiatry, University of Oxford Oxford, UK ; Department of Pharmacology, University of Oxford Oxford, UK.
Judith V SchweimerDepartment of Psychiatry, University of Oxford Oxford, UK ; Department of Pharmacology, University of Oxford Oxford, UK.
Katherine E BurnhamDepartment of Psychiatry, University of Oxford Oxford, UK ; Department of Pharmacology, University of Oxford Oxford, UK.
Philip W J BurnetDepartment of Psychiatry, University of Oxford Oxford, UK.
Trevor SharpDepartment of Pharmacology, University of Oxford Oxford, UK.
Paul J HarrisonDepartment of Psychiatry, University of Oxford Oxford, UK.
University of Oxford · GB

Funding

Medical Research Council G0801352
6 · The paper itself

Abstract

D-amino acid oxidase (DAO, DAAO) degrades the NMDA receptor co-agonist D-serine, modulating D-serine levels and thence NMDA receptor function. DAO inhibitors are under development as a therapy for schizophrenia, a disorder involving both NMDA receptor and dopaminergic dysfunction. However, a direct role for DAO in dopamine regulation has not been demonstrated. Here, we address this question in two ways. First, using in situ hybridization and immunohistochemistry, we show that DAO mRNA and immunoreactivity are present in the ventral tegmental area (VTA) of the rat, in tyrosine hydroxylase (TH)-positive and -negative neurons, and in glial fibrillary acidic protein (GFAP)-immunoreactive astrocytes. Second, we show that injection into the VTA of sodium benzoate, a DAO inhibitor, increases frontal cortex extracellular dopamine, as measured by in vivo microdialysis and high performance liquid chromatography. Combining sodium benzoate and D-serine did not enhance this effect, and injection of D-serine alone affected dopamine metabolites but not dopamine. These data show that DAO is expressed in the VTA, and suggest that it impacts on the mesocortical dopamine system. The mechanism by which the observed effects occur, and the implications of these findings for schizophrenia therapy, require further study.

Indexed as

DAAODAOD-serinemicrodialysisNMDA receptorschizophrenia

Identifiers

PMID24822045
PMCPMC4014674
OpenAlexW1990464889

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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.