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And they discovered that gene activity changed in two types of brain cells. There's a class of excitatory neurons that are responsible for mood and stress regulation and a subtype of a mutia. These are immune cells that manage inflammation in the brain. In both cell types, many genes expressed differently in people with depression. So by identifying the cells, the fact that the research helps understand the biological foundation of the depression and helps kind of get rid of some of these outdated views of the disorder. And this research reinforces the neuroscience that depression isn't just emotional. It reflects real measurable changes in the brain. And scientists are looking ahead and they intend to explore how these cellular changes influence brain function and whether targeting them could lead to effective treatment. Dropping.