J. Anim Sci.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

J. Anim Sci. 1979. 49:675-682.
© 1979 American Society of Animal Science
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Steele, N. C.
Right arrow Articles by Ono, K.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Steele, N. C.
Right arrow Articles by Ono, K.

Influence of Diet Composition and Pharmacological Treatment on Longissimus Muscle Quality and Metabolism in Swine

N. C. Steele1, T. G. Althen2,3, and K. Ono2

US Department of Agriculture, SEA, AR, Beltsville, MD 20705

Abstract

Twenty-five, 90 kg, barrows were fed either a high sucrose or high fat diet for 10 days prior to slaughter and treated with either epinephrine (adenylate cyclase stimulant) or 3-isobutyl-l-methylxanthine (IBMX, phosphodiesterase inhibitor) 5 min prior to slaughter to investigate the infuence of diet composition on longissimus muscle c-AMP concentration, phosphorylase activation, glycogenolysis and muscle color as an indicator of meat quality. Animals fed the high fat diet and treated with epinephrine had darker meat than similar animals treated with IBMX or those fed the sucrose diet and treated with either epinephrine or IBMX (P<.05). The concentration of c-AMP, degree of phosphorylase activation, initial concentration of glycogen, rate of glycogenolysis, rate of lactate accumulation and rate of postmortem pH decline were not influenced by diet composition. These data would not suggest that the observed beneficial effect of dietary fat on pork quality was due to an alteration of skeletal muscle catecholamine receptor characteristics. Pretreatment of animals with a combination of a(phenoxybenzamine) and /} (propranolol) receptor blocking agents prior to epinephrine treatment demonstrated that such treatment results in less c-AMP accumulation, less phosphorylase activation, a retarded rate of glycogenolysis and darker meat compared to similar animals fed the high sucrose diet and treated with epinephrine.

Footnotes

1 Nonruminant Animal Nutrition Laboratory, Animal Science Institute.

2 Meat Science Research Laboratory, Agricultural Marketing Research Institute.

3 Present address: Department of Animal Science, Mississippi State Univ., Mississippi State 39762.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1979 by the American Society of Animal Science.