Keck School of Medicine of USC Mar 5 2025 USC Stem Cell scientists discover a new way to rid cells of toxic tau protein in a study involving mice and lab-grown human “mini-brains,” known as organoids. The neurotransmitter glutamate is essential for regulating everything from mood to memory, but it can also encourage a toxic buildup of the notorious tau protein, which can contribute to Alzheimer's and related diseases. In a USC Stem Cell-led study published in  Neuron , scientists describe a new