the journal Science

new study shows

Five major psychiatric disorders have overlapping patterns of genetic activity... 

Certain patterns of genetic activity appear to be common among five distinct psychiatric disorders — autismschizophreniabipolar disorder, depressionand alcoholism — according to a new study. The paper, appearing in the journal Science, was released Thursday.
Scientists analyzed data from 700 human brains, all donated either from patients who suffered one of these major psychiatric disorders or from people who had not been diagnosed with mental illness. The scientists found similar levels of particular molecules in the brains of people with autism, schizophrenia and bipolar disorder; other commonalities between bipolar and major depression; and other matches between major depression and alcoholism.