Evidence has been mounting that some mental disorders share many of the same genetic risk factors. Now, researchers have discovered that this overlap extends to the molecular level – some of these suspect genes also turn on-and-off similarly in the brains of people with autism spectrum disorder (ASD), schizophrenia, and bipolar disorder. These molecular signatures may hold clues to what goes wrong in the brain in these disorders—and potentially ways to better treat or even prevent them.
In search of such clues, Drs. Daniel Geschwind and Michael Gandalof the University of California Los Angeles (UCLA), and colleagues, examined gene expression in postmortem brains of people who had been diagnosed with autism spectrum disorder (ASD), schizophrenia, bipolar disorder, major depressive disorder, or alcoholism. One of the largest such efforts of its kind to date, the study, funded by the National Institute of Mental Health (NIMH), tapped brain molecular data resources gathered through the NIMH-funded PsychENCODE consortium, a data-sharing collaboration among NIMH grantees.