Document Detail


Zebrin II expressing Purkinje cell phenotype-related and -unrelated cerebellar abnormalities in Cav2.1 mutant, rolling mouse Nagoya.
MedLine Citation:
PMID:  20953553     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Rolling mouse Nagoya is an ataxic mutant mouse that carries a mutation in a gene encoding for the alpha 1A subunit of the voltage-gated P/Q-type Ca2+ channel (Cav2.1). This report summarizes our studies and others concerning cerebellar abnormalities in rolling mice based on chemical neuroanatomy. While there are no obvious cerebellar deformations in this mutant mouse, the altered functions of Purkinje cells can be revealed as a reduced expression of type 1 ryanodine receptor (RyR1) in all Purkinje cells uniformly throughout the cerebellum, and as an ectopic expression of tyrosine hydroxylase (TH) in the Purkinje cell subsets with the zebrin II-immunopositive phenotype. As the mutated Cav2.1 channel is expressed at uniform levels in all Purkinje cells, its copresence with RyR1 staining suggests that a Cav2.1 channel dysfunction links with the expression of RyR1 in Purkinje cells of rolling mice. However, an ectopic expression of TH in the Purkinje cells is topologically related to the projection of corticotrophin-releasing factor-immunopositive climbing fibers rather than expression of the mutated Cav2.1 channel. On the other hand, increased levels of serotonin (5-HT) in 5-HTergic fibers were revealed immunohistochemically in Purkinje cells of the vermis of rolling cerebellum. Thus, to determine whether or not cerebellar abnormalities are related to Purkinje cell populations revealed by zebrin II expression is essential for enhancing our understanding of the pathogenesis of hereditary cerebellar ataxic mutants such as rolling mice.
Authors:
Kazuhiko Sawada; Yoshihiro Fukui
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Publication Detail:
Type:  Journal Article     Date:  2010-10-12
Journal Detail:
Title:  TheScientificWorldJournal     Volume:  10     ISSN:  1537-744X     ISO Abbreviation:  ScientificWorldJournal     Publication Date:  2010  
Date Detail:
Created Date:  2010-10-18     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101131163     Medline TA:  ScientificWorldJournal     Country:  England    
Other Details:
Languages:  eng     Pagination:  2032-8     Citation Subset:  IM    
Affiliation:
Laboratory of Anatomy, Department of Physical Therapy, Faculty of Medical and Health Sciences, Tsukuba International University, Tsuchiura, Ibaraki, Japan.
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