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Antibody Transfection into Neurons as a Tool to Study Disease Pathogenesis
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Tenascin-R Autoimmunity: Isolated Tremor Reversed with Immunotherapy.

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This study identifies a rare autoimmune movement disorder causing severe tremor, linked to a tenascin-R antibody. Cancer treatment and immunotherapy led to complete recovery, expanding the understanding of autoimmune hyperkinetic disorders.

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Area of Science:

  • Neuroimmunology
  • Onconeural Disorders

Background:

  • Autoimmune movement disorders are recognized, but isolated tremor is rare.
  • This case highlights a unique presentation of autoimmune hyperkinetic movement disorder.

Observation:

  • A 70-year-old male presented with severe, progressive postural and intention tremor and weight loss.
  • Cerebrospinal fluid analysis revealed inflammation and a neural tissue-restricted antibody.

Findings:

  • The autoantigen was identified as tenascin-R using immunoprecipitation and mass spectrometry.
  • The patient was diagnosed with follicular lymphoma expressing tenascin-R, indicating a paraneoplastic origin.

Implications:

  • This discovery expands the spectrum of antibodies associated with autoimmune hyperkinetic movement disorders.
  • Individualized patient care and antibody identification are crucial for diagnosing and treating rare neurological conditions.
  • Successful treatment involved addressing the underlying cancer and utilizing immunotherapy, leading to complete recovery.