Rats exposed to a synthetic cannabinoid in the womb developed sex-dependent changes in adulthood: males had increased sensitivity to CO2 and O2 while females had decreased sensitivity, and both sexes were more prone to high blood pressure and rapid heart rate.
Researchers studying prenatal cannabis effects and cardiorespiratory development.
Sex-specific effects: males had increased breathing sensitivity while females had decreased
What the researchers found
Males showed increased chemosensitivity to CO2 and O2, while females exhibited decreased sensitivity. Both sexes showed greater susceptibility to hypertension and tachycardia under adverse conditions. Males had more fragmented sleep, while females showed anxiolytic and panicolytic behavioral responses. No changes were found in lung mechanics or brainstem CB1 receptor expression.
Why it matters
This is among the first studies to examine how prenatal cannabinoid exposure affects the cardiorespiratory system long-term. The sex-specific effects on breathing control and cardiovascular regulation suggest that prenatal cannabis exposure may create lasting vulnerability to cardiorespiratory problems.
The numbers in context
WIN 55,212-2 dose: 0.5 mg/kg/day during gestation; males: increased CO2/O2 chemosensitivity, fragmented sleep; females: decreased chemosensitivity, anxiolytic responses; both: hypertension and tachycardia susceptibility
How the study worked
Pregnant rats received daily synthetic cannabinoid (WIN 55,212-2, 0.5 mg/kg/day) during gestation. Adult offspring were assessed for cardiorespiratory control, chemosensitivity, sleep patterns, and panic-like behavior.
What this study cannot tell us
Used a synthetic cannabinoid (not THC or whole cannabis). Single dose level. Rat model may not translate directly to humans. The sex differences make interpretation complex.
How to read the evidence
Animal study using a synthetic cannabinoid at a single dose. Novel cardiorespiratory findings but limited translatability.
When this study was published
Published in 2024.
The bigger picture
Most prenatal cannabis research focuses on brain development and behavior. This study extends concerns to the cardiorespiratory system, an area that has received little attention despite the potential clinical relevance.
Questions still open
- Would THC or whole cannabis produce similar cardiorespiratory effects to WIN 55,212-2?
- Could prenatal cannabis exposure increase vulnerability to sleep apnea or other breathing disorders in humans?
Common questions
Can prenatal cannabis affect breathing?
Were the effects the same in males and females?
Read the original research
Long-term effects on cardiorespiratory and behavioral responses in male and female rats prenatally exposed to cannabinoid.
American journal of physiology. Lung cellular and molecular physiology, 327(3), L341-L358
Citation
Patrone, Luis Gustavo A; Frias, Alana T; Fantinatti, Gabriel T; Stabile, Angelita M; Klein, Wilfried; Bícego, Kênia C; Gargaglioni, Luciane H. (2024). Long-term effects on cardiorespiratory and behavioral responses in male and female rats prenatally exposed to cannabinoid.. American journal of physiology. Lung cellular and molecular physiology, 327(3), L341-L358. https://doi.org/10.1152/ajplung.00042.2024
Explore the wider topic
- How to Talk to Your Teenager About Weed (Without Losing Them)
- My Kid's Friends Smoke Weed: A Parent's Guide
- I Smoke Weed But Don't Want My Kids To: Navigating the Hypocrisy
- Quitting Weed as a Parent: Why It Is the Hardest and Most Important Quit
- Quitting Weed as a Teen or Young Adult
- My Kid Is Smoking Weed: A Parent's Guide