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[Anti-NMDA Receptor Encephalitis].

Takahiro Iizuka1, Naomi Kanazawa, Atsuko Yanagida

  • 1Department of Neurology, Kitasato University.

Brain and Nerve = Shinkei Kenkyu No Shinpo
|May 19, 2021
PubMed
Summary
This summary is machine-generated.

Autoimmune encephalitis, including anti-NMDAR encephalitis, involves antibodies targeting neuronal surface proteins. This review updates diagnosis and treatment strategies for these complex neurological disorders.

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Area of Science:

  • Neuroimmunology
  • Neurology
  • Autoimmune Diseases

Background:

  • Anti-NMDA receptor (NMDAR) encephalitis is a significant autoimmune neurological disorder.
  • Autoantibodies against neuronal surface (NS) proteins are implicated in various conditions, including post-herpes simplex encephalitis (post-HSE) and stiff-person spectrum disorder.
  • These antibodies contribute to diverse clinical manifestations such as seizures, psychosis, and movement disorders.

Purpose of the Study:

  • To provide an updated overview of anti-NMDAR encephalitis.
  • To discuss the differential diagnosis of cryptogenic new-onset refractory status epilepticus (NORSE).
  • To review current and emerging treatment strategies, including third-line therapies.

Main Methods:

  • Identification of NS antibodies using cell-based assays.
  • Immunohistochemistry with fixed rodent brain tissue for antibody detection.
  • Clinical case reviews and literature synthesis for diagnostic and therapeutic updates.

Main Results:

  • Autoantibodies against NMDAR (GluN1 antibodies) are a key cause of autoimmune encephalitis.
  • A spectrum of NS antibodies is associated with various neurological syndromes, highlighting diagnostic challenges.
  • Effective diagnostic and treatment strategies are crucial for managing these conditions.

Conclusions:

  • Anti-NMDAR encephalitis requires timely diagnosis and appropriate management.
  • Understanding the role of NS antibodies aids in diagnosing and treating overlapping autoimmune neurological disorders.
  • This review emphasizes the importance of updated diagnostic criteria and advanced therapeutic approaches.