Evidence map›Paper›PMID 23481437›Full record

ArticleNeuropsychopharmacology : official publication of the American College of Neuropsychopharmacology2013

Estradiol as a mechanism for sex differences in the development of an addicted phenotype following extended access cocaine self-administration.

Carolina P Ramôa, Susan E Doyle, Diana W Naim, Wendy J Lynch

Open access · bronzeAbstract read
In one paragraph

Article in Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed
3.2field-weighted citation impact, top 8% 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

47 citing papers in PubMed, 70 citations in OpenAlex.

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  6. Neuroscience in addiction research.Journal of neural transmission (Vienna, Austria : 1996) · 2024
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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

4 authors at 1 institution in 1 country.

Carolina P RamôaDepartment of Psychiatry and Neurobehavioral Sciences, University of Virginia, Charlottesville, VA 22911, USA.
Susan E Doyle
Diana W Naim
Wendy J Lynch
University of Virginia · US

Funding

Dopaminergic and Glutamatergic Mechanisms of Cocaine Addiction: Sex DifferencesR01DA024716 · NIDA · UNIVERSITY OF VIRGINIA · PI Wendy Jean Lynch · 2008 to 2026
$6.1M
NIDA NIH HHS R01 DA024716NIDA NIH HHS R01DA024716
6 · The paper itself

Abstract

Women progress more rapidly after initial cocaine use to addiction as compared with men. Similarly, female rats appear to require less cocaine exposure before developing an addicted phenotype with evidence implicating estradiol as a potential mechanism. The goals of this study were to determine whether there are sex differences in the magnitude of the addicted phenotype under optimized conditions that induce its development in both males and females and to determine the role of estradiol in this effect. Following acquisition, intact male and intact and ovariectomized (OVX) female rats with and without estradiol replacement were given access to cocaine (1.5 mg/kg per infusion) under either extended access (ExA; discrete trial procedure, 4 trials/h, 24 h/day, 10 days) or short access (ShA) conditions (20 infusions maximum/day, 3 days). Motivation to obtain cocaine (0.5 mg/kg/infusion), as assessed under a progressive-ratio schedule, was then examined following a 2-week abstinence period. Results showed that following ExA self-administration, both males and females developed an addicted phenotype, with 9 of 11 males and 8 of 10 females showing a greater than 15% increase in levels of motivation to obtain cocaine as compared with ShA controls. In contrast, within the OVX groups, responding was enhanced from control levels after ExA self-administration in estradiol-replaced rats only. These results suggest that while females may have an enhanced vulnerability to developing an addicted phenotype, they may be similar to males once addiction has developed. These results also suggest that estradiol is critically involved in the development of an addicted phenotype in females.

Indexed as

Sex CharacteristicsAnimalsBehavior, AddictiveCocaineConditioning, OperantEstradiolFemaleHormone Replacement TherapyInjections, SubcutaneousMaleMotivationOvariectomyPhenotypeRatsReinforcement ScheduleSelf AdministrationCocaineEstradiol

Identifiers

PMID23481437
PMCPMC3717535
OpenAlexW2081158199

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.