The Rodent Electronic Nicotine Delivery System: Apparatus for Voluntary Nose-Only E-Cigarette Aerosol Inhalation.
Study Goal
The researchers aimed to validate the Rodent Electronic Nicotine Delivery System (RENDS) as a preclinical model for nicotine aerosol self-administration.
Results Summary
The study confirmed that RENDS effectively sequesters nicotine aerosol in the nose port, demonstrated robust self-administration of flavored nicotine aerosol in rats, and resulted in high blood cotinine levels and withdrawal symptoms.
Population
Rats (preclinical model)
Effective Dosage
Not specified
Duration
Not specified
Interactions
None mentioned
| Intervention | Direction | Endpoint | Population | Dosage | Impact | Claim # |
|---|---|---|---|---|---|---|
RENDS (Rodent Electronic Nicotine Delivery System) | no change | nicotine aerosol in the nose port | preclinical model | - | 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 |
Tobacco use is the leading cause of death globally and in the U.S. 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 task have substantial limitations, however. Therefore, we created the Rodent Electronic Nicotine Delivery System, a novel low-cost non-proprietary 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 strong 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 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).