Protein, nucleic acid content and activity of micro- and m-calpain in the longissimus dorsi muscle as affected by protein and energy restriction during early growth of pigs.
The study was conducted to determine the changes in growth rate, protein deposition, concentration of nucleic acids, and activity of calpain enzymes in the longissimus dorsi muscle of pigs, which received a low protein and low energy diet from 25-50 kg bodyweight (BW) followed by adequate feeding to 105 kg BW in comparison with pigs fed adequately throughout the study. The muscle of pigs subjected to limitation tended to grow slower and deposit less protein daily (by 25%, p < 0.10), but have a significantly lower DNA concentration (by 13%, p < 0.01). The activity of micro- and m-calpain was also significantly lower compared with control pigs (0.942 vs. 1.92 and 0.246 vs. 0.403 U/g, respectively). After resumption of adequate feeding, the daily gain of muscle and protein deposition did not differ from control pigs. Moreover, at 80 kg and 105 kg BW the DNA and RNA concentration as well as the activity of m-calpain and micro-calpain did not differ between groups.
Skiba
Grzegorz
G
The Kielanowski Institute of Animal Physiology and Nutrition, Polish Academy of Sciences, Jabłonna, Poland. g.skiba@ifzz.pan.pl
Raj
Stanisława
S
Weremko
Dagmara
D
Fandrejewski
Henryk
H
D000818:Animals; D031204:Caloric Restriction / Q000662:veterinary*; D002154:Calpain / Q000378:metabolism*; D004044:Dietary Proteins / Q000378:metabolism*; D005260:Female; D009124:Muscle Proteins / Q000737:chemistry*; D018482:Muscle, Skeletal / Q000737:chemistry* / Q000378:metabolism; D009696:Nucleic Acids / Q000737:chemistry*; D013552:Swine / Q000254:growth & development* / Q000378:metabolism; D015430:Weight Gain
D004044:Dietary Proteins; D009124:Muscle Proteins; D009696:Nucleic Acids; D002154:Calpain