Teenage cannabinoid exposure changed how adult mice responded to cocaine withdrawal
Mice exposed to a synthetic cannabinoid during adolescence showed altered cocaine withdrawal effects as adults: reduced anxiety but increased depressive symptoms compared to controls.
Quick Facts
What This Study Found
Mice pre-treated with the synthetic cannabinoid WIN 55212-2 during adolescence and then given chronic cocaine in adulthood showed a modified withdrawal profile compared to controls.
Adolescent cannabinoid exposure prevented the anxiety increase normally seen during cocaine withdrawal. However, it produced greater depressive-like symptoms during cocaine cessation. The psychotic-like effects of WIN (measured by pre-pulse inhibition deficits) persisted into adulthood regardless of cocaine exposure, and memory impairment during cocaine withdrawal was not altered by prior cannabinoid treatment.
The results suggest that adolescent cannabinoid exposure does not simply worsen all cocaine withdrawal symptoms but selectively modifies the emotional dimensions of withdrawal.
Key Numbers
Adolescent WIN pre-treatment prevented cocaine withdrawal-induced anxiety (elevated plus maze) but increased depressive-like behavior (tail suspension test). Pre-pulse inhibition deficits from WIN persisted independently of cocaine exposure. Object recognition impairment during cocaine withdrawal was unaffected by prior WIN exposure.
How They Did This
Juvenile mice received the CB1 agonist WIN 55212-2 during adolescence, then underwent chronic cocaine treatment in adulthood followed by withdrawal. Researchers tested four behavioral domains during withdrawal: pre-pulse inhibition (psychosis-like), object recognition (memory), elevated plus maze (anxiety), and tail suspension (depression-like).
Why This Research Matters
Cannabis use in adolescence has been epidemiologically linked to later cocaine use, but the biological mechanisms are poorly understood. This study suggests that adolescent cannabinoid exposure creates lasting changes in how the brain responds to cocaine withdrawal, potentially altering the experience of quitting cocaine in ways that could affect relapse.
The Bigger Picture
The finding that adolescent cannabinoid exposure selectively modifies cocaine withdrawal adds nuance to the "gateway drug" discussion. Rather than simply increasing vulnerability, early cannabinoid exposure appears to reshape the emotional landscape of subsequent drug withdrawal in complex ways, potentially making some aspects easier and others harder.
What This Study Doesn't Tell Us
Used a synthetic cannabinoid (WIN 55212-2), which is more potent and selective than THC. The doses and administration route differ from human cannabis use. Mouse behavioral tests are approximations of human psychiatric symptoms. The study did not examine females.
Questions This Raises
- ?Would THC produce the same modification of cocaine withdrawal effects?
- ?Does the reduced anxiety but increased depression during withdrawal affect relapse likelihood?
- ?How do these behavioral changes map onto the neurotransmitter systems involved?
Trust & Context
- Key Stat:
- Adolescent cannabinoid exposure prevented cocaine withdrawal anxiety but increased depression-like behavior
- Evidence Grade:
- Animal study using a synthetic cannabinoid in mice. Provides mechanistic insight into cross-drug interactions but uses compounds and routes different from human use.
- Study Age:
- Published in 2017. Described as the first study to show long-lasting behavioral consequences of juvenile cannabinoid exposure on cocaine withdrawal.
- Original Title:
- Adolescent Exposure to the Synthetic Cannabinoid WIN 55212-2 Modifies Cocaine Withdrawal Symptoms in Adult Mice.
- Published In:
- International journal of molecular sciences, 18(6) (2017)
- Authors:
- Aguilar, María A(3), Ledesma, Juan Carlos(2), Rodríguez-Arias, Marta(4), Penalva, Carles, Manzanedo, Carmen, Miñarro, José, Arenas, M Carmen
- Database ID:
- RTHC-01322
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
Does teenage cannabis use make cocaine withdrawal worse?
In this mouse study, the picture was mixed. Adolescent cannabinoid exposure actually reduced anxiety during cocaine withdrawal but increased depressive symptoms. The overall effect on withdrawal severity depends on which dimension you examine.
Is this related to the gateway drug theory?
It addresses one possible mechanism: that early cannabinoid exposure biologically alters how the brain later responds to other drugs and their withdrawal. However, it does not support a simple "cannabis leads to cocaine" narrative, as the effects were selective and mixed.
Read More on RethinkTHC
- 30-days-without-weed
- 6-months-sober-weed-what-to-expect
- 90-days-no-weed
- benefits-of-quitting-weed
- boredom-after-quitting-weed
- boredom-after-quitting-weed-nothing-fun
- creativity-without-weed-quitting-artist-musician
- hobbies-after-quitting-weed
- how-to-talk-to-teenager-about-weed
- identity-after-quitting-weed
- kids-friends-smoke-weed-parent-guide
- leaving-stoner-culture-identity
- money-saved-quitting-weed-calculator
- one-year-sober-weed
- parent-smokes-weed-kids-hypocrite
- quitting-weed-creativity
- quitting-weed-face-changes-skin
- quitting-weed-parent
- quitting-weed-teenager-young-adult
- quitting-weed-weight-loss-gain
- teenager-smoking-weed-parent-guide
Cite This Study
https://rethinkthc.com/research/RTHC-01322APA
Aguilar, María A; Ledesma, Juan Carlos; Rodríguez-Arias, Marta; Penalva, Carles; Manzanedo, Carmen; Miñarro, José; Arenas, M Carmen. (2017). Adolescent Exposure to the Synthetic Cannabinoid WIN 55212-2 Modifies Cocaine Withdrawal Symptoms in Adult Mice.. International journal of molecular sciences, 18(6). https://doi.org/10.3390/ijms18061326
MLA
Aguilar, María A, et al. "Adolescent Exposure to the Synthetic Cannabinoid WIN 55212-2 Modifies Cocaine Withdrawal Symptoms in Adult Mice.." International journal of molecular sciences, 2017. https://doi.org/10.3390/ijms18061326
RethinkTHC
RethinkTHC Research Database. "Adolescent Exposure to the Synthetic Cannabinoid WIN 55212-2..." RTHC-01322. Retrieved from https://rethinkthc.com/research/aguilar-2017-adolescent-exposure-to-the
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.