Effects of growth hormone on skeletal muscle. I. Studies on normal adult rats
- 1 April 1989
- journal article
- research article
- Published by Wiley in Acta Physiologica Scandinavica
- Vol. 135 (4), 531-536
- https://doi.org/10.1111/j.1748-1716.1989.tb08612.x
Abstract
A study was made on the effects of recombinant human growth hormone (rhGH) on fast and slow skeletal muscle in normal adult female rats. Daily injections of 4 IE of rhGH over 36 days resulted in increased levels of insulin-like growth factor I in serum and increased body weight. Morphometric analysis of the muscle fibres of the extensor digitorum longus (EDL) and soleus muscles revealed a significant increase in diameter of both type I and type 2 fibres in both muscles. The DNA:protein ratio and the number of satellite cells:muscle fibre in cross-sections was increased in the GH-treated rats in relation to controls. The results show that rhGH has pronounced effects on both cell proliferation and muscle fibre growth in skeletal muscle of normal adult rats.Keywords
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