mortality/aging
• about 30% of mice die within the first 40 days due to profound muscle weakness
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behavior/neurological
• mice are weaker in the inverted wire screen holding test and in the grip strength test
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muscle
• alterations in myofibrillar organization, enlarged and swollen mitochondria and autophagic/lysosomal vacuoles
• large desmin inclusions in some myofibers
• muscle shows the presence of keratin 18 positive inclusions that colocalize with the mutant protein in the center of some muscle fibers
• accumulation of the RNA-binding proteins hnRNPA1 and hnRNPA2/B1as small puncta within the center of scattered myofibers, indicating inclusions
|
• alterations in expression and localization of Z-disc components and decreased organization
• levels of Z-disc proteins desmin, alpha-actinin, and syncolin are increased, while myotilin is unchanged and synemin is decreased
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• mice develop progressive muscle weakness that is detectable at 2 months of age
|
• mice exhibit myopathic features with internal nuclei, variation in fiber size and increased endomysial connective tissue
|
Mouse Models of Human Disease |
DO ID | OMIM ID(s) | Ref(s) | |
autosomal dominant limb-girdle muscular dystrophy type 1 | DOID:0110305 |
OMIM:603511 |
J:226488 |