"Motherhood's Brain Rewired by Single Protein"

The presence of the MECP2 protein in parvalbumin (PV) neurons is crucial for newly-mothering mice to rapidly learn and respond to their pups' distress cries, hinting at how the brain rewires during pivotal adult learning phases. When MECP2 is absent, maternal mice show neglectful behavior toward their young, illuminating how the protein's dysfunction could contribute to communication and interpretation deficits in neurodevelopmental disorders like Rett syndrome in humans. Furthermore, the work illuminates the versatility of the brain's circuits, which, though they solidify as we age, retain the capacity for significant rewiring during specific life events.