Abstract
An ubiquitin-binding protein, p62, is one of the components of the ubiquitin-containing
inclusions in several human neurodegenerative diseases. Amyotrophic lateral sclerosis
(ALS) is characterized by the presence of skein-like inclusions, Lewy body-like inclusions,
and basophilic inclusions in the remaining anterior horn cells, in which these inclusions
contain ubiquitin, while the other characteristic inclusions of Bunina type are ubiquitin-negative.
We examined the spinal cord from 28 ALS cases including two ALS with dementia and
two ALS with basophilic inclusions, using antibody to p62. The results demonstrated
that p62 localized in skein-like inclusions, Lewy body-like inclusions and basophilic
inclusions. The number of p62-positive inclusions observed in the remaining anterior
horn cells of each section was variable among the ALS cases. In contrast, Bunina bodies,
that do not contain ubiquitin, were negative for p62. As far as we examined, the 11
non-ALS cases did not show any p62 immunoreactivities in the anterior horn cells.
Our results suggested that p62 plays important roles in forming the inclusions and
may be associated with the protection of the neurons from degenerative processes involving
ubiquitin.
Keywords
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Article info
Publication history
Accepted:
May 19,
2006
Received in revised form:
May 18,
2006
Received:
April 10,
2006
Identification
Copyright
© 2006 Elsevier B.V. Published by Elsevier Inc. All rights reserved.
