Evidence map›Paper›PMID 21993206›Full record

ArticleNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology2012

Long-lasting effects of a PEGylated mutant cocaine esterase (CocE) on the reinforcing and discriminative stimulus effects of cocaine in rats.

Gregory T Collins, Diwahar Narasimhan, Alyssa R Cunningham, Matthew E Zaks, Joseph Nichols, Mei-Chuan Ko, Roger K Sunahara, James H Woods

Open access · bronzeAbstract read
In one paragraph

Article in Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
1.0field-weighted citation impact, top 32% 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

24 citing papers in PubMed, 26 citations in OpenAlex.

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  20. Thinking outside the synapse: pharmacokinetic-based medications for cocaine addiction.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology · 2012
    Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 2 institutions in 1 country.

Gregory T CollinsDepartment of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA. gcollins@mclean.harvard.edu
Diwahar Narasimhan
Alyssa R Cunningham
Matthew E Zaks
Joseph Nichols
Mei-Chuan Ko
Roger K Sunahara
James H Woods
University of Michigan–Ann Arbor · USHarvard University · US

Funding

Development of Esterases for the Treatment of Cocaine Overdose and AbuseR01DA021416 · NIDA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI WOODS, JAMES H · 2006 to 2009
$2.8M
Evaluation in Primates of Cocaine Esterase for the Treatment of Cocaine ToxicityR01DA023213 · NIDA · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI KO, MEI-CHUAN · 2008 to 2010
$1.5M
NIDA NIH HHS DA 021416NIDA NIH HHS DA 023213NIDA NIH HHS R01 DA021416NIDA NIH HHS R01 DA023213
6 · The paper itself

Abstract

Recent mutagenesis studies have identified a mutant G4C/S10C/T172R/G173Q cocaine esterase (CCRQ CocE) with an in vitro duration of action of >40 days. Although the in vivo duration of CCRQ CocE's action was <24 h, modification of this enzyme with polyethylene glycol (PEG) polymers resulted in a CocE (PEG-CCRQ CocE) capable of preventing cocaine-induced lethality for up to 72 h. The current studies were aimed at providing a detailed characterization of the effectiveness, selectivity, and duration of PEG-CCRQ CocE's actions in cocaine self-administration and discrimination assays in rats. Pretreatment with PEG-CCRQ CocE produced dose-dependent rightward shifts in the dose-response curves for cocaine self-administration and discrimination, with the highest dose of PEG-CCRQ CocE capable of producing an initial shift of cocaine's reinforcing and interoceptive effects of >30-fold to the right, with significant inhibition of these effects observed for up to 72 h. Although PEG-CCRQ CocE also produced slight reductions in the rates of methylphenidate- and food-reinforced responding, these effects were short-lived, lasting <24 h. Finally, when taken together with the finding that PEG-CCRQ CocE failed to alter the cocaine-like interoceptive effects of either methylphenidate or d-amphetamine, these results suggest that PEG-CCRQ CocE possesses a high degree of pharmacologic specificity for cocaine and a prolonged in vivo duration of action. In conclusion, these studies provide strong evidence to support the further development of long-lasting, highly efficient CocEs, such as PEG-CCRQ CocE, as a potential therapeutic option for the treatment of cocaine abuse in humans.

Indexed as

Reinforcement, PsychologyAnimalsCarboxylic Ester HydrolasesCocaineConditioning, OperantDiscrimination, PsychologicalDopamine Uptake InhibitorsDose-Response Relationship, DrugDrug InteractionsFood PreferencesInjections, IntraperitonealKetamineMaleMethylphenidateRatsRats, Sprague-DawleyCarboxylic Ester HydrolasesCocainecocaine esteraseDopamine Uptake InhibitorsKetamineMethylphenidateSucroseSweetening Agents

Identifiers

PMID21993206
PMCPMC3306869
OpenAlexW1975678504

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.