Researchers at McGill University and the Douglas Institute have discovered that two distinct types of brain cells function differently in people with depression. The findings, published in Nature Genetics , offer important clues that could lead to new treatments designed to target these specific cells. They also provide a clearer understanding of depression, a condition that affects more than 264 million people worldwide and remains a leading cause of disability. "This is the first time we've been able to identify what specific brain cell types are affected in depression by mapping gene activity together with mechanisms that regulate the DNA code," said senior author Dr. Gustavo Turecki, a professor at McGill, clinician-scientist at the Douglas Institute and Canada Research Chair in Major Depressive Disorder and Suicide.…