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Title : UK study finds children who were exposed to opioids before birth are more likely to develop chronic diseases when they grow up
link : UK study finds children who were exposed to opioids before birth are more likely to develop chronic diseases when they grow up

UK study finds children who were exposed to opioids before birth are more likely to develop chronic diseases when they grow up

By Lindsay Travis
University of Kentucky

What happens to the cardiovascular health of babies exposed to opioids in the womb?

A new study at the University of Kentucky suggests that children born to mothers who use opioids during pregnancy may be more likely to develop chronic diseases as adults, including cardiovascular and metabolic diseases. 

Opioid abuse is a key public-health challenge in Kentucky and the U.S., which saw over half a million opioid-related overdose deaths in 2022 alone. The use and misuse of opioids during pregnancy have grown rapidly over the past decade. On average, about one baby born every 15 minutes in the U.S. has an array of symptoms stemming from opioid use during pregnancy, called neonatal opioid withdrawal syndrome.

NOWS symptoms are usually treatable in babies, but scientists have known little about the potential long-term health impacts of in utero opioid exposure once these children grow up.

Analia Loria, Ph.D.

“It is challenging to predict the long-term impact on the cardiovascular health of children from women with opioid misuse and opioid overdoses due to the lack of follow-ups after discharge,” said Analia Loria, Ph.D., senior study author and an associate professor in the Department of Pharmacology and Nutritional Sciences in the University of Kentucky College of Medicine. “However, our studies provide insights regarding how opioids could affect the programming of the mechanisms regulating cardiovascular function and increase the cardiovascular risk.”

The researchers developed a rat model that mimics the use of drugs during pregnancy and studied what happens to the offspring from birth until adulthood. They found that babies of mothers who used drugs while pregnant were shorter at birth and weighed less during the breastfeeding stage. When they started eating independently, they gained weight quickly and caught up to their non-exposed peers, a pattern that has been found to increase the risk of cardiovascular and metabolic disease.

“Overall, we found that the systems that control blood pressure and how sugar and lipids are processed in our bodies are altered in drug-exposed babies,” said Nermin Ahmed, a registered dietitian and UK doctoral candidate in pharmacology and nutritional sciences. “This could mean that adults who were exposed to drugs in the womb are more likely to develop chronic diseases like high blood pressure, diabetes, chronic kidney disease and high cholesterol, and they may also be more susceptible to other drugs and environmental stressors. This prenatal exposure can permanently change how the body handles a second exposure to opioids.”

As adults, rats exposed to drugs in the womb had higher blood pressure, poorer blood sugar control and increased levels of bad cholesterol despite eating the same type of diet as the nondrug-exposed rats. The researchers also observed differences in the expression of certain proteins and receptors involved in regulating how the brain responds to drugs, raising the possibility that people exposed to opioids in the womb may also face a higher risk of drug dependence later in life.

The study draws attention to the effects of the opioid epidemic on childbearing women and the importance of screening for prenatal opioid exposure. Researchers say that knowing more about such exposures could help to inform disease prevention and treatment approaches throughout the lifespan.

Researchers presented their work in April to the American Physiological Society. The study was published in the American Heart Association’s journal Hypertension, online here.

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