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Paroxysmal dyskinesias in mice
Thomas L Shirley1, Lekha M Rao, Ellen J Hess
1Department of Neurology, Johns Hopkins University, Baltimore, Maryland, USA.
Abstract:
Animal models of human disease are important tools for revealing the underlying mechanisms of pathophysiology and developing therapeutic strategies. Several unique mouse calcium channel mutants have been identified with nonepileptic, episodic dyskinetic movements that are phenotypically similar to human paroxysmal dyskinesias. In this report, video demonstrations of these motor attacks are provided for two previously described mouse mutants, tottering and lethargic, as well as a new one, rocker. Semiquantitative comparisons using two different rating scales reveal differences in attack morphology, severity, and duration among the strains. These mice provide three independent models of paroxysmal dyskinesia and support for prior proposals that channelopathies may underlie the human disorders.
Insights
Mouse calcium channel mutants, including tottering, lethargic, and rocker, exhibit episodic movement disorders. These findings support channelopathies as a cause of human paroxysmal dyskinesias.
Area of Science:
- Neuroscience
- Genetics
- Pharmacology
Background:
- Animal models are crucial for understanding human diseases and developing treatments.
- Specific mouse calcium channel mutants display episodic movement disorders resembling human paroxysmal dyskinesias.
Purpose of the Study:
- To present video demonstrations of motor attacks in tottering, lethargic, and rocker mouse mutants.
- To compare the phenotypic characteristics of these mouse models of paroxysmal dyskinesia.
Main Methods:
- Video recording and analysis of motor attacks in three mouse strains.
- Semiquantitative assessment using two distinct rating scales to evaluate attack features.
Main Results:
- Distinct differences in attack morphology, severity, and duration were observed among the tottering, lethargic, and rocker mouse mutants.
- The study provides detailed phenotypical characterization of these three independent models.
Conclusions:
- These mouse mutants serve as valuable models for studying paroxysmal dyskinesia.
- The findings lend support to the hypothesis that channelopathies are implicated in human paroxysmal dyskinesias.
