Provides a methodological framework for assessing muscle mass, fiber type, and contractility in murine models and cell lines.
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Supplies a framework for murine muscle phenotyping; leaves open translation to cardiovascular models.
Muscle weakness is an important phenotype of many diseases that is linked to impaired locomotion and increased mortality. The force that a muscle can generate is determined predominantly by muscle size, fiber type and the excitation-contraction coupling process. Here we describe methods for the histological assessment of whole muscle to determine fiber cross-sectional area and fiber type, determination of changes in myocyte size using C2C12 cells, in vivo functional tests and measurement of contractility in dissected whole muscles. The extensor digitorum longus and soleus muscles are ideally suited for whole-muscle contractility, and dissection of these muscles is described.
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Bonetto et al. (2015) studied this question.
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