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Labs

Elise Weerts

Johns Hopkins University, MD·Pharmacology

Cannabis use and cannabis use disorder (CUD) are rising in the US, yet no FDA-approved medication treats CUD. One obstacle is the lack of good animal models for testing new drugs.

Fields

Pharmacology

Neuroscience

Psychology

Topics

cannabis use disorder

delta-9-tetrahydrocannabinol

cannabinoids

Grants
1 known grant, through Apr 2028

What they work on

  1. Test whether vaporized cannabis extract produces effects that rats trained on injected THC recognize as similar, and whether a CB1 receptor blocker cancels them, using drug discrimination procedures.
  2. Establish the dose and timing effects of CAN-THC vapor discrimination, find optimal training doses, and relate effects to blood levels of THC and its metabolites.
  3. Determine whether CAN-THC vapor sustains drug-seeking and self-administration above control vapor under a second-order schedule, where drug-paired cues also reward responding.

More about the research

Researchers need rodents that reliably work to obtain cannabis or THC (delta-9-tetrahydrocannabinol, its main mind-altering ingredient). Most rat studies that deliver THC by intravenous injection have failed to show this. People mostly inhale cannabis, so delivering vaporized cannabis extract may give a more realistic model.

Why it matters

With no approved medication for cannabis use disorder, a reliable rodent model of cannabis vapor use could serve as a platform for testing new treatment drugs. It may also clarify why cannabis is rewarding and how it feels to the user. Such a model could speed medication development for people with CUD.

Known grants

From NIH and NSF research grants. Labs often have other funding we can't see.

Optimizing rodent models of drug discrimination and self-administration of vaporized cannabis extracts for medications development

NIH · May 2026 – Apr 2028

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Characterize how psilocybin doses of 1, 5, 15, and 25 mg affect simulated driving and computerized cognitive and psychomotor performance, and test whether impairment at higher doses matches alcohol at 0.08% blood alcohol concentration.

The school

Johns Hopkins University: 100 labs on PI Pages, $4.1B a year on research, 622 research doctorates a year.

More about Johns Hopkins University

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