Effects of a methamphetamine vaccine, IXT-v100, on methamphetamine-related behaviors.

Affiliation

Department of Pharmacology, Toxicology & Neuroscience, LSU Health Shreveport, 1501 Kings Highway, Shreveport, LA, 71130, USA. [Email]

Abstract

BACKGROUND : Vaccines have been developed as a potential treatment for methamphetamine (meth) use disorder (MUD). Immunization with the meth vaccine IXT-v100 has previously been shown to elicit antibodies with high affinity for meth and thus may be an effective treatment for MUD.
OBJECTIVE : These studies were designed to determine the efficacy of IXT-v100 on meth-taking and meth-seeking behaviors in rats.
METHODS : In the acquisition and maintenance study, male and female rats were trained to self-administer meth (0.06 mg/kg/infusion) over an 8-week period following vaccination. In the last 4 weeks, the dose of meth was increased or decreased each week. To assess meth-seeking behavior, the meth-primed reactivity model was used. Rats were trained to self-administer meth for 5 weeks, followed by a 5-week or 11-week forced abstinence period during which the animals were vaccinated. Rats were then placed back into the self-administration chamber immediately after being injected with meth (1 mg/kg, i.p.) but did not receive meth during the session. Responses were recorded and used as a measure of meth seeking.
RESULTS : Results from the acquisition and maintenance study in Wistar rats show that vaccination with IXT-v100 adjuvanted with glucopyranosyl lipid A stable emulsion decreases the percentage of animals that will self-administer a moderate level of meth. In the meth-primed reactivity studies, results from males showed that vaccination significantly attenuates meth-seeking behavior.
CONCLUSIONS : Together, these results suggest vaccination with IXT-v100 may be effective at decreasing meth-taking and meth-seeking behaviors in humans suffering with MUD.

Keywords

Acquisition,Meth-primed reactivity,Methamphetamine,Self-administration,Therapeutic vaccine,

OUR Recent Articles