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Morphology of lesions in striated muscle fibres from the beige mouse
Abstract:
Lesions in striated muscle fibres from the beige mouse are described at both the light- and electronmicroscopical levels. The muscles have two types of lesions, one is well defined cores in the fibres and the other is diffusely enlarged intermyofibrillar spaces (IMS). The cores can be filled with membrane-like structures or a fluffy unstructured material. In the areas with enlarged IMS comparatively few organelles are present and the muscle fibres seem to be fragmented.
Insights
Striated muscle fibers in beige mice exhibit two distinct lesions: well-defined cores and enlarged intermyofibrillar spaces (IMS). These findings reveal unique pathological changes in mouse muscle tissue.
Area of Science:
- Muscle pathology
- Mouse models
- Cell biology
Background:
- Striated muscle fibers are essential for movement.
- Understanding muscle lesions is crucial for diagnosing neuromuscular disorders.
- Beige mice are a model organism for studying genetic conditions.
Purpose of the Study:
- To characterize the ultrastructural lesions in striated muscle fibers of beige mice.
- To differentiate between core lesions and enlarged intermyofibrillar spaces (IMS).
Main Methods:
- Light microscopy of muscle tissue.
- Electron microscopy of muscle tissue.
- Histopathological analysis of beige mouse muscle fibers.
Main Results:
- Identified two primary lesion types: well-defined cores and diffusely enlarged intermyofibrillar spaces (IMS).
- Muscle cores contained membrane-like structures or amorphous material.
- Enlarged IMS regions showed sparse organelles and fiber fragmentation.
Conclusions:
- Beige mouse striated muscle displays characteristic histopathological alterations.
- The observed lesions, cores and enlarged IMS, represent distinct pathological entities.
- These findings contribute to the understanding of muscle fiber pathology in this mouse model.