Western blot analysis of cathepsin-D in tissue supernatant fluids from normal and
degenerative soleus muscles. The three forms of cathepsin-D, which are
preprocathepsin-D, procathepsin-D, and cathepsin-D mature form (heavy chain), were
detected in the CON and HULT rats (a). Preprocathepsin-D level decreased in the HULT
group (b). Procathepsin-D level showed no significant difference between the CON and
HULT groups (c). The total inactive form of cathepsin-D, which is the amount of
preprocathepsin-D and procathepsin-D, decreased in the HULT group (d), and the active
form of cathepsin-D increased drastically in the HULT group (e). The results represent
the mean ± SD. *Significant difference between the CON and HULT groups (p < 0.05).
†Significant difference between the CON and HULT groups (p < 0.001).