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PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1984-1-7
pubmed:abstractText
Compensatory hypertrophy of the rat soleus was compared between normal rats (N) and rats bearing a non-metastasizing mammary tumor (TB). Two weeks after the tumor inoculation, introduced subcutaneously on the midline of the upper back, the two groups of rats underwent unilateral tenotomy of the plantaris and gastrocnemius muscles to induce functional overload or compensatory hypertrophy of the soleus. One week later, the body weight (BW), wet muscle weights (MW), percent of Type I (slow-twitch) and Type II (fast-twitch) muscle fibers and contractile parameters of the isometric twitch (Pt) and tetanic (Po) tensions were evaluated. The TB animals did not show any signs of cancer cachexia. The sham-operated control soleus muscles of the two groups were similar in wet MW, maximum isometric Pt and Po. The latent period (LP), the contraction time (CT), the half relaxation time (HRT) and the number of Type I (slow-twitch) fibers were increased significantly. The hypertrophied muscles in the N and TB rats showed significant declines in the maximum isometric Pt, compared to their respective controls. These data suggest that the compensatory hypertrophy of muscle is expressed similarly in both the normal and tumor-bearing rats but that it interferes with the generation of isometric twitch tension in the muscle.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-510X
pubmed:author
pubmed:issnType
Print
pubmed:volume
61
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
171-9
pubmed:dateRevised
2004-11-17
pubmed:meshHeading
pubmed:year
1983
pubmed:articleTitle
Compensatory hypertrophy of the soleus in tumor-bearing rats.
pubmed:publicationType
Journal Article