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Impaired Brain Growth Found in Pre-term Babies Exposed to Steroids
The findings challenge the recent policy statement of The American Academy of Pediatrics, which suggests that low doses of glucocorticoids -- a class of steroid hormones used in premature babies to support lung maturation, the normalization of blood pressure and breathing -- can continue to be used in premies. In their 2010 statement, the Academy recommended that high-dose dexamethasone not be given to babies after birth, but stated that the evidence was insufficient to make a recommendation regarding other doses of glucocorticoids.
In the current study, published in the Oct. 19, 2011, issue of Science Translational Medicine, the researchers found that betamethasone given to mothers in premature labor was not associated with adverse affects on the baby's brain growth. However, they found that premature babies given hydrocortisone or dexamethasone in a low-dose range after birth had, on average, 10 percent smaller cerebellar volumes by the time they were full term.
"This study provides new evidence that these drugs, even at low doses, are associated with impaired cerebellar development when given to babies after birth," said Emily Tam, MD, a child neurologist in the Neurological Intensive Care Nursery at the UCSF Benioff Children's Hospital and lead author of the study.
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