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The rodent electronic nicotine delivery system: Apparatus for voluntary nose-only e-cigarette aerosol inhalation.

Journal of the experimental analysis of behavior
March 1, 2025
Amy L Odum et al. (16 authors)
Journal ArticleAnimal Study
Study Details

Study Goal

The researchers aimed to validate a novel preclinical model (RENDS) for nicotine aerosol self-administration to study intervention and prevention tactics.

Results Summary

The study confirmed that RENDS effectively delivers nicotine aerosol, leading to high blood cotinine levels and withdrawal symptoms in rats, validating its use for preclinical research.

Population

Laboratory rats

Effective Dosage

Not specified

Duration

Not specified

Interactions

None mentioned

Extracted Claims (3)
InterventionDirectionEndpointPopulationDosageImpactClaim #
RENDS (rodent electronic nicotine delivery system)
neutral
nicotine aerosol in the nose port
-
-
sequesters
#1
flavored nicotine aerosol
increase
blood levels of cotinine
rats
high
robustly self-administer
#2
flavored nicotine aerosol
increase
spontaneous somatic withdrawal symptoms
rats
-
resulting in
#3
Abstract

Tobacco use is the leading cause of death globally and in the United States. After decades of decline, driven by decreases in combusted tobacco use, nicotine product use has increased due to electronic nicotine delivery systems, also known as e-cigarettes or vapes. Preclinical models of nicotine self-administration can serve as important lodestars in the search for effective intervention and prevention tactics. Current variants of the preclinical models have substantial limitations, however. Therefore, we created the rodent electronic nicotine delivery system (RENDS), a novel low-cost nonproprietary nose-only preclinical model of nicotine aerosol self-administration. We confirmed that RENDS sequesters nicotine aerosol in the nose port by measuring fine particulate matter (PM <2.5 microns) generated by e-cigarettes. We also showed that rats robustly self-administer flavored nicotine aerosol, resulting in high blood levels of cotinine (the major nicotine metabolite) and spontaneous somatic withdrawal symptoms. Thus, we provide validation of the operation and function of the RENDS, opening the door to an open-source preclinical aerosol model of nicotine self-administration that is relatively low in cost. Four existing operant chambers can be retrofitted with the RENDS for less than $325/chamber. All RENDS diagrams and plans for custom-designed components are on Open Science Framework (https://osf.io/x2pqf/?view_only=775b55435b8e428f98e6da384ef7889d).

Medical Subject Headings (MeSH)
AnimalsElectronic Nicotine Delivery SystemsRatsNicotineAerosolsMaleSelf AdministrationAdministration, InhalationRats, Sprague-DawleyVapingCotinineSubstance Withdrawal Syndrome
Study Links
Quality Scores
SafetyNot Assessed
Efficacy75/10
Quality85/10
Citation Metrics
Total Citations1
Citations/Year1.0
Research Impact Scores
APT Score0.05
Weight Score2.17
Normalized Score0.67
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