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Neuronal intranuclear inclusion disease in identical twins
Annals of Neurology
|April 1, 1984
Summary
Identical twins developed neurological symptoms including motor neuron loss and unique brain inclusions. This study proposes the name Neuronal Intranuclear Inclusion Disease for this rare, fatal disorder.
Area of Science:
- Neuropathology
- Neurodegenerative Diseases
- Genetics
Background:
- Identical twins presented with a rare, fatal neurological disorder.
- The condition manifested in adolescence with progressive motor and neurological deficits.
Observation:
- Patients exhibited slurred speech, nystagmus, oculogyral spasms, rage, seizures, and motor neuron abnormalities.
- Postmortem examination revealed severe loss of motor neurons and unique intranuclear inclusion bodies in nerve cells.
- Inclusions were eosinophilic, autofluorescent, and composed of filaments rich in tryptophan.
Findings:
- The characteristic finding was the presence of neuronal intranuclear inclusion bodies (3-10 microns) in the central and peripheral nervous systems.
- Ultrastructural analysis identified these inclusions as masses of 8.5-9.5 nm filaments.
- Histochemistry suggested high tryptophan content in the inclusion body proteins.
Implications:
- This research proposes a new disease designation: Neuronal Intranuclear Inclusion Disease (NIID).
- Understanding NIID's pathology may aid in diagnosing and potentially treating similar rare neurological disorders.
- Further research into the composition and formation of these inclusions is warranted.