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Opsoclonus: clinical and immunological features.

Joanna C Jen1, Ivan Lopez, Robert W Baloh

  • 1Department of Neurology, UCLA School of Medicine, Los Angeles, CA 90095‐1769, United States.

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|July 24, 2012
PubMed
Summary
This summary is machine-generated.

Opsoclonus, a saccadic oscillation disorder, may stem from antibodies targeting the Purkinje cell synapse. This study identified anti-Purkinje cell antibodies in patients with opsoclonus, suggesting a novel autoimmune mechanism.

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Area of Science:

  • Neuroscience
  • Immunology
  • Ophthalmology

Background:

  • Opsoclonus is a saccadic oscillation disorder with an unclear neuroanatomical basis.
  • The underlying mechanisms of opsoclonus are poorly understood.

Purpose of the Study:

  • To investigate the neuroanatomical substrate and potential autoimmune mechanisms of opsoclonus.
  • To identify specific antibodies associated with opsoclonus in patients with myoclonus or tremor.

Main Methods:

  • Recorded eye movements in 7 patients with opsoclonus and myoclonus/tremor.
  • Analyzed serum samples for anti-neuronal antibodies using immunohistochemistry on cerebellar sections.
  • Investigated potential links to neoplasms and paraneoplastic syndromes.

Main Results:

  • Opsoclonus resolved in most patients within two weeks following treatment or spontaneously.
  • Anti-Purkinje cell antibodies were detected in three patients, showing punctate staining in the molecular layer.
  • No known paraneoplastic antibodies were identified in the initial screen.

Conclusions:

  • Findings support the hypothesis that opsoclonus can result from antibodies targeting the parallel fiber-Purkinje cell synapse.
  • These antibodies may disrupt parallel fiber input, allowing aberrant cerebellar activity to affect oculomotor nuclei.
  • This suggests an autoimmune basis for opsoclonus in some individuals.