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Optineurin in neurodegenerative diseases
Tenshi Osawa1, Yuji Mizuno, Yukio Fujita
1Department of Neurology, Gunma University Graduate School of Medicine, Gunma, Japan.
Summary
Optineurin, a protein linked to glaucoma, is found in various neurodegenerative diseases, including amyotrophic lateral sclerosis (ALS). Its presence in these conditions suggests a broader role, though its exact significance remains unclear.
Area of Science:
- Neuroscience
- Genetics
- Ophthalmology
Background:
- Optineurin is associated with glaucoma, a leading cause of blindness.
- Mutations in the optineurin gene have been recently identified in patients with amyotrophic lateral sclerosis (ALS).
- Optineurin aggregation in spinal cord inclusions suggests it may be a marker for ALS.
Purpose of the Study:
- To investigate the distribution of optineurin in various neurodegenerative diseases.
- To determine if optineurin is exclusively found in ALS-associated pathologies.
Main Methods:
- Immunohistochemical analysis of post-mortem brain and spinal cord tissues.
- Examination of optineurin presence in pathological inclusions across multiple neurodegenerative disorders.
Main Results:
- Optineurin was detected in various pathological structures beyond ALS, including Alzheimer's disease, Parkinson's disease, Creutzfeldt-Jakob disease, multiple system atrophy, and Pick disease.
- Optineurin was found in ubiquitin-positive inclusions, but also in some basophilic inclusions that were ubiquitin-negative.
- This indicates optineurin expression is not always correlated with ubiquitin.
Conclusions:
- Optineurin is widely distributed in diverse neurodegenerative conditions.
- The precise role and significance of optineurin in these diseases are currently unknown.
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