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N-methyl-D-aspartate receptor autoimmunity affects cognitive performance in herpes simplex encephalitis
Umeå University, Faculty of Medicine, Department of Clinical Microbiology, Infectious Diseases.
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2016 (English)In: Clinical Microbiology and Infection, ISSN 1198-743X, E-ISSN 1469-0691, Vol. 22, no 11, 934-940 p.Article in journal (Refereed) Published
Abstract [en]

Objectives: To investigate the prevalence and temporal development of N-methyl-D-aspartate receptor (NMDAR) autoantibodies in relation to neurocognitive performance in patients with herpes simplex encephalitis (HSE).

Methods: This prospective observational study enrolled a total of 49 HSE patients within a randomized controlled trial of valacyclovir. Cerebrospinal fluid and serum samples were drawn in the initial stage of disease, after 2 to 3 weeks and after 3 months. Anti-NMDAR IgG was detected with HEK293 cells transfected with plasmids encoding the NMDA NR1 type glutamate receptor. A batch of neurocognitive tests, including the Mattis Dementia Rating Scale (MDRS), Glasgow Coma Scale (GCS), Reaction Level Scale (RLS85), Mini-Mental State Examination (MMSE) and National Institutes of Health (NIH) stroke scale, was performed during 24 months' follow-up.

Results: Anti-NMDAR IgG was detected in 12 of 49 participants. None were antibody positive in the initial stage of disease. In ten of 12 positive cases, specific antibodies were detectable only after 3 months. Notably, the development of NMDAR autoantibodies was associated with significantly impaired recovery of neurocognitive performance. After 24 months' follow-up, the median increase in MDRS total score was 1.5 vs. 10 points in antibody-positive and -negative participants (p = 0.018).

Conclusions: Anti-NMDAR autoimmunity is a common complication to HSE that develops within 3 months after onset of disease. The association to impaired neurocognitive recovery could have therapeutical implications, as central nervous system autoimmunity is potentially responsive to immunotherapy. 

Place, publisher, year, edition, pages
2016. Vol. 22, no 11, 934-940 p.
Keyword [en]
Autoantibodies, Autoimmunity, Herpes simplex encephalitis, IgG, Mattis Dementia Rating Scale, N- thyl-D-aspartate receptor, Neurocognitive impairment, NMDAR
National Category
Microbiology in the medical area Infectious Medicine
Identifiers
URN: urn:nbn:se:umu:diva-128967DOI: 10.1016/j.cmi.2016.07.028ISI: 000388119300009PubMedID: 27497810OAI: oai:DiVA.org:umu-128967DiVA: diva2:1060799
Available from: 2016-12-30 Created: 2016-12-20 Last updated: 2017-01-13Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
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