| Autor: |
Reichhardt CC; Department of Animal, Dairy and Veterinary Science, Utah State University, 4815 Old Main Hill, Logan, UT 84322, USA., Okamoto LL; Department of Animal, Dairy and Veterinary Science, Utah State University, 4815 Old Main Hill, Logan, UT 84322, USA., Motsinger LA; Department of Animal, Dairy and Veterinary Science, Utah State University, 4815 Old Main Hill, Logan, UT 84322, USA., Griffin BP; Department of Animal, Dairy and Veterinary Science, Utah State University, 4815 Old Main Hill, Logan, UT 84322, USA., Murdoch GK; Department of Animal, Veterinary and Food Sciences, University of Idaho, Logan, ID 83844, USA.; Department of Animal Sciences, Washington State University, Pullman, WA 99163, USA., Thornton KJ; Department of Animal, Dairy and Veterinary Science, Utah State University, 4815 Old Main Hill, Logan, UT 84322, USA. |
| Abstrakt: |
Emerging research suggests that hormones found in anabolic implants interact with polyamine biosynthesis. The objective of this study was to determine the effects of steroidal hormones, polyamines and polyamine precursors on bovine satellite cell (BSC) differentiation and polyamine biosynthesis temporally. Primary BSCs were induced to differentiate in 3% horse serum (CON) and treated with 10 nM trenbolone acetate (TBA), 10 nM estradiol (E2), 10 nM TBA and 10 nM E2, 10 mM methionine, 8 mM ornithine, 2 mM putrescine, 1.5 mM spermidine, or 0.5 mM spermine. Total mRNA was isolated 0, 2, 4, 8, 12, 24, and 48 h post-treatment. Abundance of mRNA for genes associated with induction of BSC differentiation: paired box transcription factor 7, myogenic factor 5, and myogenic differentiation factor 1 and genes in the polyamine biosynthesis pathway: ornithine decarboxylase and S-adenosylmethionine-were analyzed. Overall, steroidal hormones did not impact ( p > 0.05) mRNA abundance of genes involved in BSC differentiation, but did alter ( p = 0.04) abundance of genes involved in polyamine biosynthesis. Polyamine precursors influenced ( p < 0.05) mRNA of genes involved in BSC differentiation. These results indicate that polyamine precursors and polyamines impact BSC differentiation and abundance of mRNA involved in polyamine biosynthesis, while steroidal hormones altered the mRNA involved in polyamine biosynthesis. |
