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Study implicates marijuana use in pregnancy problems
Date:9/12/2012

CINCINNATI New research indicates marijuana-like compounds called endocannabinoids alter genes and biological signals critical to the formation of a normal placenta during pregnancy and may contribute to pregnancy complications like preeclampsia.

A study in the Sept. 14 edition of The Journal of Biological Chemistry offers new evidence that abnormal biological signaling by endocannabinoid lipid molecules produced by the body disrupts the movement of early embryonic cells important to a healthy pregnancy, in particular trophoblast cells that form the placenta. Abnormal placental function is common in preeclampsia a medical condition of unknown cause that is a danger to mother and child.

The research from scientists in the Division of Reproductive Sciences at Cincinnati Children's Hospital Medical Center analyzed mouse preimplantation embryos mutated to alter endocannabinoid signaling. They found that either silencing or enhancing endocannabinoid signaling adversely affects trophoblast stem cell migration.

"The findings or our investigation raise concerns that exposure to cannabis products may adversely affect early embryo development that is then perpetuated later in pregnancy," said Sudhansu K. Dey, PhD., principal investigator on the study and division director. "Also, given that endocannabinoid signaling plays a key role in the central nervous system, it would be interesting in future studies to examine whether affected cell migration-related genes in early embryos also participate in neuronal cell migration during brain development."

Along with co-first authors Huirong Xie and Xiaofei Sun, Dey and other members of the research team studied mouse embryos that had not yet implanted inside the uterus of the mother. Previous research by Dey's laboratory has shown the timing of critical events in early pregnancy, including when and how well an embryo implants in the uterus, is vital to a healthy pregnancy and birth.
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Contact: Nick Miller
nicholas.miller@cchmc.org
513-803-6035
Cincinnati Children's Hospital Medical Center
Source:Eurekalert

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