Researchers report that long-lasting physical pressure on the brain can make neurons activate a self-destruct program. When many neurons die, the loss is permanent and can cause problems with sensing, movement and thinking.
In the lab, the team grew networks of neurons and glial cells from iPSCs (stem cells that become brain cells) and applied sustained pressure to copy compression found in a growing brain mass. Students compared which cells lived and which cells died under pressure.
Analysis of RNA showed increased molecules linked to stress and inflammation. Patient data and further tests on preclinical models showed similar patterns. The findings point to possible targets for drugs to protect neurons.
Difficult words
- neuron — nerve cell that sends signals in the brainneurons
- self-destruct — to activate a program that kills itself
- glial cell — support cell that helps neurons workglial cells
- stem cell — basic cell that can become many cell typesstem cells
- inflammation — body response that causes swelling and damage
- compression — pressure that pushes tissues together inside body
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Discussion questions
- Why is neuron loss a serious problem for people?
- What kinds of drug ideas could help protect neurons?
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