Effects of steroidal implantation and ractopamine-HCl on nitrogen retention, blood metabolites and skeletal muscle gene expression in Holstein steers

Summary Six Holstein steers (231 ± 17 kg) housed in metabolism crates were used in a randomized complete block design with three blocks of two steers based on previous serum insulin‐like growth factor (IGF)‐I concentrations. One of the two steers in each block was implanted with 120 mg trenbolone ac...

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Veröffentlicht in:	Journal of animal physiology and animal nutrition 2007-10, Vol.91 (9-10), p.439-447
Hauptverfasser:	Walker, D. K., Titgemeyer, E. C., Sissom, E. K., Brown, K. R., Higgins, J. J., Andrews, G. A., Johnson, B. J.
Format:	Artikel
Sprache:	eng
Schlagworte:	Animal Feed Animal Nutritional Physiological Phenomena Animals cattle Cattle - blood Cattle - growth & development Cattle - metabolism Digestion Drug Combinations Drug Implants Drug Interactions Estradiol - pharmacology growth Insulin-Like Growth Factor I - metabolism Male Muscle, Skeletal - metabolism Muscle, Skeletal - pathology Nitrogen - blood Nitrogen - metabolism Phenethylamines - pharmacology Polymerase Chain Reaction - methods Polymerase Chain Reaction - veterinary ractopamine RNA, Messenger - metabolism steroidal implant Trenbolone Acetate - analogs & derivatives Trenbolone Acetate - pharmacology Weight Gain - drug effects
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