IMPACT STATEMENT: Gaining knowledge about opioid exposure and placental transfer of opioids is an important part of providing clinicians with the necessary information for therapeutic strategies during pregnancy in the rising opioid epidemic. Opioids exposure often includes a mixture rather than an exposure to an individual opioid. We investigated placental trophoblast permeability to opioids in vitro for six individual opioids and selected mixtures. The rate and concentration of opioid translocation across placental trophoblast monolayer varied considerably between the six investigated opioids. Oxycodone had the highest level of translocation. We also found that the transfer of heroin decreased when administered together with fentanyl, while no change was observed for fentanyl transfer in the mixture. This suggests that opioid mixtures may decrease translocation of some opioids while others are unaffected.
Placental trophoblast transfer of opioids following exposures to individual or mixtures of opioids in vitro
Mortensen, N. P., Caffaro [Moreno], M. M., Snyder, R. W., Yueh, Y. L., & Fennell, T. R. (2019). Placental trophoblast transfer of opioids following exposures to individual or mixtures of opioids in vitro. Experimental Biology and Medicine, 244(10), 846-849. [1535370219851109]. https://doi.org/10.1177/1535370219851109
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