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Effects of severe energy and protein deficiencies on the fibres and nuclei in skeletal muscle of pigs

Published online by Cambridge University Press:  09 March 2007

N. C. Stickland ,
Elsie M. Widdowson  and
G. Goldspink
N. C. Stickland
Affiliation:
Zoology Department, University of Hull, Hull
Elsie M. Widdowson
Affiliation:
Department of Investigative Medicine, University of Cambridge, Cambridge CB2 1QN
G. Goldspink
Affiliation:
Zoology Department, University of Hull, Hull
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Abstract

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1. Measurements have been made of the size and number of muscle fibres and number of nuclei in a small indicator muscle (m. flexor digiti V brevis) in the fore-foot of the pig. Wellnourished, 10-d-old and 1-year-old animals were studied, as well as 1- and 2-year-old animals that were severely energy-deficient and protein-deficient.

2. The normal 1-year-old animals had much larger muscle fibres, with more nuclei, than the pigs in any of the other groups.

3. There were no significant differences between the numbers of fibres in the muscles of pigs in any of the four groups.

4. There was a significant difference between the number of fibres in the muscles of pigs coming from different litters, irrespective of their dietary history after birth. This suggests that the number of fibres is determined genetically before birth, and all that can take place after birth is an alteration in size.

Type
Papers of direct relevance to Clinical and Human Nutrition
Information
British Journal of Nutrition , Volume 34 , Issue 3 , November 1975 , pp. 421 - 428
Copyright
Copyright © The Nutrition Society 1975

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