Evidence map›Paper›PMID 21450041›Full record

ArticleGenes, brain, and behavior2008

Animals lacking endothelin-converting enzyme-2 are deficient in learning and memory.

R M Rodriguiz, K Gadnidze, A Ragnauth, N Dorr, M Yanagisawa, W C Wetsel, L A Devi

Open access · greenAbstract read
In one paragraph

Article in Genes, brain, and behavior, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed
1.2field-weighted citation impact, top 26% 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

29 citing papers in PubMed, 64 citations in OpenAlex.

  1. Endothelin-converting enzyme 2 regulates κ opioid receptor trafficking and function.The Journal of pharmacology and experimental therapeutics · 2025
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  12. PLEKHA5 as a Biomarker and Potential Mediator of Melanoma Brain Metastasis.Clinical cancer research : an official journal of the American Association for Cancer Research · 2015
    Article
  13. Article
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  15. Disruption of the expression of the proprotein convertase PC7 reduces BDNF production and affects learning and memory in mice.Proceedings of the National Academy of Sciences of the United States of America · 2013
    Article
  16. Article
  17. 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

7 authors at 3 institutions in 1 country.

R M RodriguizDepartment of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC, USA.
K Gadnidze
A Ragnauth
N Dorr
M Yanagisawa
W C Wetsel
L A Devi
Duke University Hospital · USDuke Medical Center · USHoward Hughes Medical Institute · US

Funding

Enzymes Involved in Neuropeptide Biosynthesis, Processing and RegulationR01NS026880 · NINDS · NEW YORK UNIVERSITY SCHOOL OF MEDICINE · PI DEVI, LAKSHMI A · 1994 to 2019
$6.5M
POST-TRANSLATIONAL REGULATION OF OPIOID RECEPTORSK05DA019521 · NIDA · MOUNT SINAI SCHOOL OF MEDICINE OF NYU · PI DEVI, LAKSHMI A · 2005 to 2014
$1.2M
ENZYMES INVOLVED IN DYNORPHIN BIOSYNTHESISR29NS026880 · NINDS · NEW YORK UNIVERSITY · PI DEVI, LAKSHMI A · 1989 to 1993
–
NIDA NIH HHS DA019521NIDA NIH HHS K05 DA019521NINDS NIH HHS NS026880NINDS NIH HHS R01 NS026880
6 · The paper itself

Abstract

Endothelin-converting enzyme (ECE)-2 is a metalloprotease that possesses many properties consistent with it being a neuropeptide-processing enzyme. This protease is found primarily in neural tissues, with high levels of expression in midbrain, cerebellum, hypothalamus, frontal cortex and spinal cord and moderate levels in hippocampus and striatum. To evaluate its role in neural function, mice have been generated lacking this enzyme. Physical appearance, autonomic reflexes, motor co-ordination, balance, locomotor activity and spontaneous emotional responses appear normal in these knockout (KO) mice. However, these mutants display deficits in learning and memory as evidenced by marked impairment in the Morris water maze. Knockout mice are also deficient in object recognition memory where they show delays in discerning changes in object location and in recognizing the introduction of a novel object. In this study, perseveration appears to interfere with learning and memory. Finally, mutants are impaired in social transmission of food preference where they show poor short-term memory and perturbations in long-term memory; the latter can be ameliorated by reminder cues. As ECE-2 has been implicated in Alzheimer's disease, the deficits in learning and memory in the KO mice may provide unique insights into processes that may contribute to this disease and possible other disorders of cognition.

Indexed as

AnimalsAspartic Acid EndopeptidasesBehavior, AnimalEmotionsEndothelin-Converting EnzymesExploratory BehaviorFemaleFood PreferencesLearning DisabilitiesMaleMaze LearningMemory DisordersMetalloendopeptidasesMiceMice, Inbred C57BLMice, KnockoutAspartic Acid EndopeptidasesEce2 protein, mouseEndothelin-Converting EnzymesMetalloendopeptidasesNeuropeptidesRNA

Identifiers

PMID21450041
PMCPMC2891928
OpenAlexW2019349431

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.