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Rigshospitalet - a part of Copenhagen University Hospital
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A prospective three-year follow-up study on the clinical significance of anti-neuronal antibodies in acute psychiatric disorders

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  • M B Schou
  • S G Sæther
  • O K Drange
  • E Brenner
  • J Crespi
  • L Eikenes
  • M S Mykland
  • C Pintzka
  • A K Håberg
  • T Sand
  • A Vaaler
  • D Kondziella
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The clinical significance of anti-neuronal antibodies for psychiatric disorders is controversial. We investigated if a positive anti-neuronal antibody status at admission to acute psychiatric inpatient care was associated with a more severe neuropsychiatric phenotype and more frequent abnormalities during clinical work-up three years later. Patients admitted to acute psychiatric inpatient care who tested positive for N-methyl-D-aspartate receptor (NMDAR), contactin-associated protein 2 (CASPR2) and/or glutamic acid decarboxylase 65 (GAD65) antibodies (n = 24) were age - and sex matched with antibody-negative patients (1:2) from the same cohort (n = 48). All patients were invited to follow-up including psychometric testing (e.g. Symptom Checklist-90-Revised), serum and cerebrospinal fluid (CSF) sampling, EEG and 3 T brain MRI. Twelve antibody-positive (ab+) and 26 antibody-negative (ab-) patients consented to follow-up. Ab+ patients had more severe symptoms of depression (p = 0.03), psychoticism (p = 0.04) and agitation (p = 0.001) compared to ab- patients. There were no differences in CSF analysis (n = 6 ab+/12 ab-), EEG (n = 7 ab+/19 ab-) or brain MRI (n = 7 ab+/17 ab-) between the groups. In conclusion, anti-neuronal ab+ status during index admission was associated with more severe symptoms of depression, psychoticism and agitation at three-year follow-up. This supports the hypothesis that anti-neuronal antibodies may be of clinical significance in a subgroup of psychiatric patients.

Original languageEnglish
JournalScientific Reports
Volume10
Issue number1
Pages (from-to)35
ISSN2045-2322
DOIs
Publication statusPublished - 31 Dec 2019

ID: 59014457