Prenatal THC exposure caused sex-specific brain and behavior changes in rat offspring
Rats exposed to THC in the womb developed anxiety-like and depression-like behaviors in adulthood, with males showing more persistent brain lipid disruptions than females.
Quick Facts
What This Study Found
Prenatal THC exposure induced lasting behavioral and neuronal changes in male and female rat offspring resembling neuropsychiatric conditions, with profound disruption of fatty acid pathways in the developing brain.
Key Numbers
THC dose was 3 mg/kg daily from GD7 to GD22. Females showed significant fatty acid alterations at prepubescence but recovered by adulthood. Males had persistent fatty acid deficits into adulthood. Both sexes showed enduring glutamatergic/GABAergic dysfunction in the nucleus accumbens.
How They Did This
Pregnant Wistar rats received THC (3 mg/kg) or vehicle from gestational day 7 to 22. Adult offspring underwent behavioral testing, electrophysiology, molecular assays, and MALDI imaging mass spectrometry of brain fatty acids at prepubescence and adulthood.
Why This Research Matters
This study identifies specific biological mechanisms through which prenatal cannabis exposure may alter brain development, showing that THC disrupts the brain's fatty acid landscape in ways that differ between males and females.
The Bigger Picture
With maternal cannabis use rising, understanding exactly how THC affects fetal brain development is critical. This study points to fatty acid pathways and sex-specific vulnerability as key pieces of that puzzle.
What This Study Doesn't Tell Us
This is an animal study, so results may not directly translate to humans. The THC dose and route of administration differ from typical human consumption patterns. The study used only THC, not whole cannabis with its many other compounds.
Questions This Raises
- ?Do similar fatty acid disruptions occur in human fetuses exposed to cannabis?
- ?Why do females recover from lipid changes while males do not?
- ?Could omega-3 supplementation during pregnancy offset any THC-related fatty acid deficits?
Trust & Context
- Key Stat:
- Males showed persistent fatty acid deficits into adulthood; females recovered
- Evidence Grade:
- Preliminary: single animal study with controlled conditions but no human data.
- Study Age:
- Published in 2022.
- Original Title:
- Prenatal THC Exposure Induces Sex-Dependent Neuropsychiatric Endophenotypes in Offspring and Long-Term Disruptions in Fatty-Acid Signaling Pathways Directly in the Mesolimbic Circuitry.
- Published In:
- eNeuro, 9(5) (2022)
- Authors:
- Sarikahya, Mohammed H(8), Cousineau, Samantha, De Felice, Marta(6), Lee, Kendrick, Wong, Karen Kw, DeVuono, Marieka V, Jung, Tony, Rodríguez-Ruiz, Mar, Ng, Tsun Hay Jason, Gummerson, Dana, Proud, Emma, Hardy, Daniel B, Yeung, Ken K-C, Rushlow, Walter, Laviolette, Steven R
- Database ID:
- RTHC-04197
Evidence Hierarchy
Tests effects in animals (usually mice or rats), not humans.
What do these levels mean? →Frequently Asked Questions
What did THC do to the developing brain in this study?
THC profoundly disrupted fatty acid pathways in the brain's reward system (mesolimbic circuitry), and both sexes showed lasting abnormalities in how neurons communicate using glutamate and GABA.
Why were males and females affected differently?
Female offspring showed significant fatty acid changes early on but recovered by adulthood, while males had persistent deficits. The exact reason for this sex difference is not yet known but may involve hormonal factors.
Can these findings be applied to humans?
Not directly. Rat studies provide important mechanistic insights, but the doses, timing, and biology differ enough that human studies are needed to confirm whether similar effects occur in people.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-04197APA
Sarikahya, Mohammed H; Cousineau, Samantha; De Felice, Marta; Lee, Kendrick; Wong, Karen Kw; DeVuono, Marieka V; Jung, Tony; Rodríguez-Ruiz, Mar; Ng, Tsun Hay Jason; Gummerson, Dana; Proud, Emma; Hardy, Daniel B; Yeung, Ken K-C; Rushlow, Walter; Laviolette, Steven R. (2022). Prenatal THC Exposure Induces Sex-Dependent Neuropsychiatric Endophenotypes in Offspring and Long-Term Disruptions in Fatty-Acid Signaling Pathways Directly in the Mesolimbic Circuitry.. eNeuro, 9(5). https://doi.org/10.1523/ENEURO.0253-22.2022
MLA
Sarikahya, Mohammed H, et al. "Prenatal THC Exposure Induces Sex-Dependent Neuropsychiatric Endophenotypes in Offspring and Long-Term Disruptions in Fatty-Acid Signaling Pathways Directly in the Mesolimbic Circuitry.." eNeuro, 2022. https://doi.org/10.1523/ENEURO.0253-22.2022
RethinkTHC
RethinkTHC Research Database. "Prenatal THC Exposure Induces Sex-Dependent Neuropsychiatric..." RTHC-04197. Retrieved from https://rethinkthc.com/research/sarikahya-2022-prenatal-thc-exposure-induces
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.