The current state of ayahuasca research in animal models: A systematic review
OpenAlex – August 04, 2022
Source: OpenAlex
Summary
Ayahuasca demonstrates promising therapeutic potential, particularly in its antidepressant effects. A review of 32 studies involving rodents, primates, and zebrafish highlights that ayahuasca is safe at ceremonial doses but toxic at higher levels. Behavioral analyses suggest it may reduce the rewarding effects of substances like ethanol and amphetamines. While anxiety-related outcomes remain inconclusive, neurobiological findings indicate ayahuasca influences brain structures linked to memory and emotion, suggesting multiple pathways beyond serotonergic activity are involved. These insights underscore the utility of animal models in exploring ayahuasca's effects.
Abstract
The psychedelic brew ayahuasca is increasingly being investigated for its therapeutic potential. To review and summarize data available on ayahuasca research using animal models, we systematically searched five databases (PubMed, Web of Science, EMBASE, LILACS and PsycInfo) for peer-reviewed studies in English, Portuguese or Spanish up to July 2022. We identified 32 studies investigating ayahuasca effects on toxicological, behavioural and (neuro)biological parameters in rodents, primates and zebrafish. Toxicological results show ayahuasca is safe at ceremonial-based doses, but toxic at high doses. Behavioural results indicate an antidepressant effect and a potential to reduce the reward effects of ethanol and amphetamine-type drugs, while the anxiety-related outcomes are yet inconclusive; also, ayahuasca can influence locomotor activity, highlighting the importance of controlling for locomotion when analysing tasks depending on it. Neurobiological results show ayahuasca affects brain structures involved in memory, emotion and learning, and that other neuropathways, besides the serotonergic action, are important in modulating its effects. Essential gaps in the ayahuasca field can still be sufficed using animal models.