Testing for antibodies against glutamic acid decarboxylase and antinuclear antibodies was negative. (nejm.org)
Moreover, children with autism are also deficient in glutamic acid decarboxylase, an enzyme involved in converting glutamate to GABA (γ - Aminobutyric acid). (nourishinghope.com)
The autoantibodies commonly produced by people with APECED include one that is a marker of type 1 diabetes, called glutamic acid decarboxylase autoantibody (GAD). (sciencedaily.com)