Mice Without NAPE-PLD Show Sex-Based Differences in Opioid and Reward Responses
Mice lacking the endocannabinoid enzyme NAPE-PLD showed sex-dependent changes in how they responded to oxycodone and natural rewards like food and social interaction.
Quick Facts
What This Study Found
NAPE-PLD knockout mice displayed sex-dependent dysregulations in opioid (oxycodone) reward responsiveness and natural reward processing, revealing endocannabinoid-opioid interactions that differ between males and females.
Key Numbers
Tested male and female NAPE-PLD knockout mice on oxycodone reward and natural reward responses — specific group sizes in full methods.
How They Did This
Preclinical study using NAPE-PLD knockout mice to examine sex differences in responsiveness to oxycodone and natural rewards (food, social interaction), testing endocannabinoid-opioid system interactions.
Why This Research Matters
The opioid crisis demands better understanding of addiction biology. The endocannabinoid system interacts closely with opioid reward pathways, and sex differences in these interactions could explain why addiction manifests differently in men and women.
The Bigger Picture
Cannabis and opioid systems are deeply interconnected. Understanding how disrupting endocannabinoid synthesis affects opioid reward could inform strategies for using cannabinoids in opioid addiction treatment, with attention to sex-specific approaches.
What This Study Doesn't Tell Us
Global gene knockout, mouse behavior may not translate to human addiction. Oxycodone is one of many opioids. Natural reward paradigms are simplified models of human reward processing.
Questions This Raises
- ?Could enhancing endocannabinoid tone help reduce opioid reward and dependence?
- ?Should cannabinoid-based addiction treatments consider sex-specific dosing strategies?
Trust & Context
- Key Stat:
- Evidence Grade:
- Knockout mouse study revealing important biological mechanisms — foundational for understanding endocannabinoid-opioid interactions but not directly clinical.
- Study Age:
- Recent preclinical work at the intersection of endocannabinoid and opioid research, addressing the important role of sex differences.
- Original Title:
- Mice lacking the endocannabinoid-synthesizing enzyme NAPE-PLD exhibit sex-dependent dysregulations in responsiveness to oxycodone and a natural reward.
- Published In:
- Neuropharmacology, 278, 110573 (2025)
- Authors:
- Woodward, Taylor J(2), Sizemore, Emily, Balaji, Ananya, Port, Ada, Hainline, John, Kazi, Hasaan, Luquet, Serge, Mackie, Ken, Hohmann, Andrea G
- Database ID:
- RTHC-07973
Evidence Hierarchy
Frequently Asked Questions
How are the endocannabinoid and opioid systems connected?
These systems share overlapping brain circuits involved in pain, reward, and mood. Anandamide (made by NAPE-PLD) can modulate how the brain responds to opioids, affecting both pain relief and addiction potential.
Why do sex differences matter for addiction?
Men and women develop addiction differently — different rates, triggers, and treatment responses. This study shows that endocannabinoid-opioid interactions are sex-dependent at a biological level, which could inform more personalized treatments.
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Cite This Study
https://rethinkthc.com/research/RTHC-07973APA
Woodward, Taylor J; Sizemore, Emily; Balaji, Ananya; Port, Ada; Hainline, John; Kazi, Hasaan; Luquet, Serge; Mackie, Ken; Hohmann, Andrea G. (2025). Mice lacking the endocannabinoid-synthesizing enzyme NAPE-PLD exhibit sex-dependent dysregulations in responsiveness to oxycodone and a natural reward.. Neuropharmacology, 278, 110573. https://doi.org/10.1016/j.neuropharm.2025.110573
MLA
Woodward, Taylor J, et al. "Mice lacking the endocannabinoid-synthesizing enzyme NAPE-PLD exhibit sex-dependent dysregulations in responsiveness to oxycodone and a natural reward.." Neuropharmacology, 2025. https://doi.org/10.1016/j.neuropharm.2025.110573
RethinkTHC
RethinkTHC Research Database. "Mice lacking the endocannabinoid-synthesizing enzyme NAPE-PL..." RTHC-07973. Retrieved from https://rethinkthc.com/research/woodward-2025-mice-lacking-the-endocannabinoidsynthesizing
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.