Serotonin plays role in many autism cases, studies confirm Interesting information on Serotonin. ScienceDaily (2011-02-24) — Nearly a third of cases of autism spectrum disorder may have a serotonin component. Scientists now provided further proof by using a serotonin-mimicking medication to improve the social behaviors of a particular type of mice. Share this:ShareFacebookTwitterEmailLike this:Like Loading... Related