Posted on November 18, 2019
University of Illinois Chicago researchers report that intermittent exposure to high levels of alcohol in adolescent animals leads to increased levels of microRNA-137 — a molecule that regulates gene expression in cells — in the brains of adults.
Their findings, which are published in the journal eNEURO, also show that blocking microRNA-137 in adulthood helps to reverse or reduce the lasting effects of youth drinking in animal models, such as increased alcohol use and anxiety.
“MicroRNA-137 is an important part of normal brain development, but when young brains are exposed to high amounts of alcohol intermittently, as happens with binge drinking behavior, the molecule’s regular function is altered,” said Subhash Pandey, professor of psychiatry and director of the UIC Center for Alcohol Research in Epigenetics. “By altering microRNA-137 levels, binge drinking actually rewires the brain.”