Evidence map›Paper›PMID 14988509›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2004

The tissue plasminogen activator-plasmin system participates in the rewarding effect of morphine by regulating dopamine release.

Taku Nagai, Kiyofumi Yamada, Masako Yoshimura, Kazuhiro Ishikawa, Yoshiaki Miyamoto, Kazuki Hashimoto, Yukihiro Noda, Atsumi Nitta, Toshitaka Nabeshima

Open access · greenAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2004. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
4.8field-weighted citation impact, top 3% 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

34 citing papers in PubMed, 111 citations in OpenAlex.

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  15. Depletion of perineuronal nets in the amygdala to enhance the erasure of drug memories.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2014
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  19. Glutamate controls tPA recycling by astrocytes, which in turn influences glutamatergic signals.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2012
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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

9 authors at 2 institutions in 1 country.

Taku NagaiDepartment of Neuropsychopharmacology and Hospital Pharmacy, Nagoya University Graduate School of Medicine, Nagoya 466-8560, Japan.
Kiyofumi Yamada
Masako Yoshimura
Kazuhiro Ishikawa
Yoshiaki Miyamoto
Kazuki Hashimoto
Yukihiro Noda
Atsumi Nitta
Toshitaka Nabeshima
Nagoya University · JPKanazawa University · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Tissue plasminogen activator (tPA) is a serine protease that catalyzes the conversion of plasminogen (plg) to plasmin, which in turn functions to degrade extracellular matrix proteins in the central nervous system. The tPA-plasmin system plays a role in synaptic plasticity and remodeling. Here we show that this protease system participates in the rewarding effects of morphine by acutely regulating morphine-induced dopamine release in the nucleus accumbens (NAcc). A single morphine treatment induced tPA mRNA and protein expression in a naloxone-sensitive manner, which was associated with an increase in the enzyme activity in the NAcc. The acute effect of morphine in inducing tPA expression was diminished after repeated administration. Morphine-induced conditioned place preference and hyperlocomotion were significantly reduced in tPA(-/-) and plg(-/-) mice, being accompanied by a loss of morphine-induced dopamine release in the NAcc. The defect of morphine-induced dopamine release and hyperlocomotion in tPA(-/-) mice was reversed by microinjections of either exogenous tPA or plasmin into the NAcc. Our findings demonstrate a previously undescribed function of the tPA-plasmin system in regulating dopamine release, which is involved in the rewarding effects of morphine.

Indexed as

RewardAnimalsBehavior, AnimalDopamineFibrinolysinMaleMiceMice, Inbred C57BLMice, KnockoutMorphineNociceptorsNucleus AccumbensPlasminogenRatsRats, WistarRNA, MessengerDopamineFibrinolysinMorphinePlasminogenRNA, MessengerTissue Plasminogen Activator

Identifiers

PMID14988509
PMCPMC373517
OpenAlexW2134044876

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.