Controversies in immunotherapy for anti-NMDA receptor encephalitis: a scoping review with a proposal of operational definitions

Neurol Sci. 2023 Dec;44(12):4307-4312. doi: 10.1007/s10072-023-07018-x. Epub 2023 Aug 19.

Abstract

Anti-NMDA receptor encephalitis (NMDARE), an autoimmune encephalitis associated with autoantibodies against the N-methyl-D-aspartate (NMDA) receptor, affects predominantly young women and is associated with psychiatric symptoms, seizures, movement disorders, and autonomic instability. Traditional treatments of anti-NMDA receptor encephalitis involve corticosteroids, intravenous immunoglobulin, plasmapheresis, cyclophosphamide, and rituximab. However, many controversies remain in the treatment for NMDA receptor encephalitis, such as optimal timing and combination of different immunotherapies, the role of newer strategies (e.g., bortezomib or tocilizumab) for severe and refractory patients, and the need or not for long-term immunosuppression. Our goal was to perform a scoping review to discuss the controversial topics of immunotherapy for NMDA receptor encephalitis and propose operational definitions to guide clinical practice and future research in the field.

Keywords: Anti-NMDA encephalitis; Glucocorticoids; Immunotherapy; Treatment.

Publication types

  • Review

MeSH terms

  • Anti-N-Methyl-D-Aspartate Receptor Encephalitis* / complications
  • Autoantibodies
  • Cyclophosphamide / therapeutic use
  • Female
  • Humans
  • Immunotherapy
  • Receptors, N-Methyl-D-Aspartate
  • Rituximab / therapeutic use

Substances

  • Receptors, N-Methyl-D-Aspartate
  • Cyclophosphamide
  • Rituximab
  • Autoantibodies