One-time exposure to cannabinoids (CBs) both synthetic and natural compounds during early pregnancy can cause growth issues in a developing embryo. This first research that showed such a connection in mammals, got published in Scientific Reports, a Nature Research journal. The study was performed in mice, which are very accurate models for the development that occurs during early pregnancy, according to the study's senior author, Scott Parnell, PhD, assistant professor of cell biology and physiology in the UNC School of Medicine.
‘Marijuana compounds and alcohol exposure should be avoided during pregnancy, as there is a high chance for brain and facial developmental defects.’
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"The development of the embryo in this time period is very similar across all vertebrates," said Parnell, a member of the UNC Bowles Center for Alcohol Studies. "In this study we also test a synthetic cannabinoid in zebrafish that yielded similar growth deformations as the natural CBs. Having the same results across animal models reinforces our findings."Read More..
In this study, the brain and facial developmental effects caused by one-time exposure to CBs - CBD and THC (the primary ingredients of marijuana) - are very similar to what is seen in fetal alcohol syndrome (FAS). Parnell and colleagues also found that when CBs and alcohol were used together, the likelihood of these birth defects more than doubled.
They went on to show that these drugs may be causing defects by interacting on a basic cellular level and disrupting signaling between molecules and cells that control growth and development.
"The interaction between alcohol and CBs we witnessed is very concerning," said the study's first author, Eric Fish, PhD, research associate in the UNC School of Medicine Bowles Center for Alcohol Studies.
"Previous studies have shown that CBs and alcohol are frequently used together, and for pregnant women we're learning that could be very dangerous to a developing child."
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The CBD amounts administered were within what is considered a therapeutic range for humans. The THC concentration administered was similar to levels reached by a person smoking marijuana.
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With the results of these one-time exposures, Parnell and Fish are planning to now test smaller, multiple exposures throughout a pregnancy that better mimics real-life usage in human pregnancy.
This research was supported by grants U01-AA021651 and U54-AA019765 from the National Institute on Alcohol Abuse and Alcoholism (NIAAA), part of the National Institutes of Health. This work was done, in part, with the Collaborative Initiative on Fetal Alcohol Spectrum Disorders (CIFASD), which is funded by grants from NIAAA.
Source-Eurekalert