QT:{{”
“Stevens has spent much of her career studying a normal immune mechanism that prunes weak or unnecessary synapses as the brain matures from the womb through adolescence, allowing more important connections to become stronger. In this process, a protein called C1q sets off a series of chemical reactions that ultimately mark a synapse for destruction. After a synapse has been “tagged,” immune cells called microglia—the brain’s trash disposal service—know to “eat” it, Stevens says. When this system goes awry during the brain’s
development, whether in the womb or later during childhood and into the teen years, it may lead to psychiatric disorders such as schizophrenia, she says.”
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