Endocannabinoid levels rose in the cervix during pregnancy in mice, and inflammation-induced disruption of this system contributed to premature cervical remodeling.
Reproductive biologists, obstetricians researching preterm birth, and endocannabinoid system researchers.
Endocannabinoid levels rose in pregnant cervix; inflammation disrupted this system and triggered premature remodeling
What the researchers found
Anandamide and 2-AG increased in the cervix of pregnant mice. LPS-induced inflammation reduced CB1 and CB2 receptor expression and increased metalloprotease activity and COX-2, modulated by cannabinoid receptor antagonists.
Why it matters
Preterm birth is a leading cause of infant mortality. Understanding how the endocannabinoid system maintains cervical integrity could reveal new prevention targets.
The numbers in context
Anandamide and 2-AG increased in pregnant vs. non-pregnant cervix. FAAH decreased. LPS reduced CB1/CB2, increased MMPs and COX-2.
How the study worked
Animal study comparing cervical tissue from non-pregnant and pregnant mice with and without LPS treatment. Mass spectrometry, Western blot, immunostaining, and explant cultures.
What this study cannot tell us
Mouse model may not fully represent human cervical biology. LPS is only one cause of preterm labor. Does not directly test exogenous cannabis exposure.
How to read the evidence
Well-designed animal study with multiple techniques, but mouse cervical biology differs from human.
When this study was published
Published in 2024.
The bigger picture
If cannabis use disrupts this cervical endocannabinoid balance, it could be one mechanism by which cannabis affects pregnancy outcomes.
Questions still open
- Does cannabis use during pregnancy disrupt the cervical endocannabinoid balance?
- Could targeted cannabinoid receptor modulation prevent preterm remodeling?
Common questions
Does the endocannabinoid system play a role in pregnancy?
Could cannabis use affect preterm birth risk?
Read the original research
Endocannabinoid regulation in the cervix during pregnancy: insights into molecular mechanisms of premature labor.
Reproduction (Cambridge, England), 167(4)
Citation
Marvaldi, Carolina; Herrero, Felisa; Johnson, Clare; Aylen Schander, Julieta; Correa, Fernando; Cella, Maximiliano; Aisemberg, Julieta; Franchi, Ana María; Bradshaw, Heather; Wolfson, Manuel Luis. (2024). Endocannabinoid regulation in the cervix during pregnancy: insights into molecular mechanisms of premature labor.. Reproduction (Cambridge, England), 167(4). https://doi.org/10.1530/REP-23-0383
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