Juvonen H, Reunanen A, Haukka J, Muhonen M, Suvisaari J, Arajärvi R, Partonen T, Lönnqvist J.
Incidence of schizophrenia in a nationwide cohort of patients with type 1 diabetes mellitus.
Arch Gen Psychiatry
.
2007 Aug
;
64(8):894-9.
PubMed
Abstract
This is an interesting epidemiological finding. A reproduction of this association in other populations would be needed. Of note, one of the autoantigens of type I diabetes (GAD, glutamic acid decarboxylase) is expressed in the nervous system and autoantibodies against GAD lead to a rare neurological disorder, Stiff-Person-Syndrome. Immunologically, type I diabetes is very complex, involving cellular and humoral immune effector mechanisms. How this may protect against the development of schizophrenia is not easily explained.