This topic has already been reported here but this article has addition info.
“Although SETD1A mutations exist in a small percentage of all schizophrenia patients, many people diagnosed with the disorder have issues similar to those caused by this mutation,” said Gogos, who is also a professor of neuroscience at Columbia’s Vagelos College of Physicians and Surgeons. “Thus, therapies that are specific to SETD1A may indeed have wider implications for schizophrenia as a whole.”