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The Emerging Concept of and Treatment Approaches for Autoimmune Psychosis

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Abstract

The etiology of severe mental illnesses (SMIs) of the schizophrenic and affective spectra still appears to be rather obscure. However, a small, emerging subgroup can now be diagnosed as autoimmune psychoses (AP), often presenting as schizophrenia-like psychosis, and can be successfully treated with various immune-modulatory treatments. These recent insights match the longer, previously defined, mild encephalitis hypothesis. Recently published consensus AP diagnostic criteria are comparable with autoimmune encephalitis criteria and are mainly based on the presence of neuronal autoantibodies in cerebrospinal fluid (CSF). Other forms of autoimmune-mediated psychiatric syndromes may present in context with systemic autoimmune diseases and yet unknown underlying causes. The frequent prevalence of minor CSF pathologies and postmortem findings of low-grade neuroinflammatory processes in a considerable subgroup of SMIs remains an intriguing challenge for further etiology-focused research, which should include immunogenetics, the role of infections and of the blood-brain barrier, and potentially, various types of immune-pathology beyond the important paraclinical methods, such as CSF diagnostics and neuroimaging.

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Bechter, K., Endres, D. (2023). The Emerging Concept of and Treatment Approaches for Autoimmune Psychosis. In: Demarin, V., Battistin, L., Budinčević, H. (eds) Mind, Brain and Education. Springer, Cham. https://doi.org/10.1007/978-3-031-33013-1_8

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