Skeletal muscle growth and protein turnover in neonatal boars and barrows

Dm, Skjaerlund; Dr, Mulvaney; Wg, Bergen; Ra, Merkel

doi:10.2527/1994.722315x

Cited by 14 publications

(9 citation statements)

References 23 publications

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“…In addition to its close association with reproduction, androgen induces growth hormone secretion, promotes growth, development, and nitrogen, phosphorous and potassium retention, and enhances muscle and bone growth in mammals (Ford and Klindt, 1989). Caponization, however, decreases muscle mass; increases meat tenderness and changes the meat components, pH value and functional characteristics (Skjaerlund et al, 1994;Madruga et al, 1999;Nold et al, 1999). However, reports on the caponization effects on quality and quantity of poultry meat were inconsistent.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Caponization Age on Muscle Characteristics in Male Chicken

Chen¹,

Chen²,

Lin³

et al. 2007

Asian Australas. J. Anim. Sci

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This study examined the caponization effects on the muscle characteristics (quality and quantity) of caponized male chickens fed before or after sexual maturity. Healthy and uniform Single Comb White Leghorn chickens were caponized at 3-week-old. Feeding was conducted until 16-week-old in trial 1 or from 12-week-old to 26-week-old in trial 2. Ten sham operated male chickens (Sham) were also assigned to each trial as the control group. Chickens used in both trials were housed in individual cages with each chicken representing one replicate. The results showed that early caponization (3-week-old) significantly increased (p<0.05) body weight and pectoral major muscle weight and percentage at 16-week-old compared to the Sham in trial 1. Caponization significantly increased (p<0.05) the protein content of the pectoral major muscle, but decreased (p<0.05) the ash content. Late caponization (12week-old) significantly decreased (p<0.05) the ash content, myofibrillar ATPase activity and emulsification capacity of the pectoral major muscle in mature capons (26-week-old) compared to the Sham in trial 2. Early caponization (3-week-old) only increased the weight and protein content of the pectoral major muscle with decreased ash content in 16-week-old capons. Late caponization (12-weekold) showed no affects on pectoral major muscle quantity, while it decreased the ATPase activity and enhanced the emulsification capacity in mature (26-week-old) capons. Hence, the muscle quality improvement was shown as capons were fed to sexual maturity.

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Section: Introductionmentioning

confidence: 99%

The Effects of Caponization Age on Muscle Characteristics in Male Chicken

Chen¹,

Chen²,

Lin³

et al. 2007

Asian Australas. J. Anim. Sci

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“…Fractional rates of protein synthesis in skeletal muscle are high immediately after birth and decline more rapidly than in other tissues of the body during the first month of life (Davis et al 1989(Davis et al , 1993a(Davis et al , 1996Skjaerlund et al 1994). In fact, the fractional rate of muscle protein synthesis in the pig and rat is about threefold higher in the newborn than at weaning and the rate of decline is attenuated as development proceeds Baillie and Garlick 1992).…”

Section: Protein Deposition Is Developmentallymentioning

confidence: 99%

Interaction of amino acids and insulin in the regulation of protein metabolism in growing animals

Davis

Suryawan²,

Bush³

et al. 2003

Can. J. Anim. Sci.

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Connor, P. M. and Thivierge, M. C. 2003. Interaction of amino acids and insulin in the regulation of protein metabolism in growing animals. Can. J. Anim. Sci. 83: 357-364. Young animals utilize their dietary amino acids more efficiently for growth because they are capable of a greater increase in tissue protein synthesis in response to feeding than older animals. This response to feeding is particularly profound in skeletal muscle. The feeding-induced stimulation of protein synthesis in skeletal muscle is uniquely and independently regulated by both insulin and amino acids. In most visceral tissues, the stimulation of protein synthesis by feeding is mediated by amino acids alone and not by insulin. The stimulation of protein synthesis by nutrition and hormones is regulated by alterations in the expression and activity of components of the intracellular signaling pathways that control the initiation of translation. Les jeunes animaux utilisent mieux les acides aminés des aliments pour la croissance parce que leurs tissus synthétisent plus de protéines que ceux de leurs aînés. Cette réaction est particulièrement évidente dans le muscle squelettique. La stimulation de la synthèse des protéines par les aliments dans le muscle squelettique est particulière et est régulée de manière indépendante par l'insuline et les acides aminés. Dans la plupart des viscères, cette stimulation n'est actionnée que par les acides aminés des aliments, pas l'insuline. La stimulation de la synthèse des protéines par la nutrition et les hormones est contrôlée par un changement au niveau de l'expression et de l'activité de certains éléments des systèmes intracellulaires qui amorcent la traduction des signaux.

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“…Until that period the young animal has depended entirely upon the placenta for the supply of oxygen and all other nutrients, and then it starts on independent life. One of the characteristics of growth in neonatal pigs is highly efficient nutrient utilization associated with high rates of skeletal muscle protein synthesis and deposition (Susenbeth and Keitel, 1987;Skjaerlund et al, 1994). Possible factors responsible for the rapid postnatal development include genetic programming, effects of dietary nutrients and actions of colostrum-derived growth factors or hormones (Wang and Hu, 1996).…”

Section: Introductionmentioning

confidence: 99%

The serum levels of insulin and igf-i in newborn piglets treated with clinoptilolite

Stojić¹,

Gvozdić²,

Nikolić-Judith³

et al. 2003

Acta vet. (Beogr.)

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The aim of this study was to investigate the influence of the natural mineral adsorber clinoptilolite on the serum levels of insulin and insulin-like growth factor-I in newborn piglets in the first 30 hours postnatally. A total number of 40 crossbred Landrace x Duroc newborn piglets from 4 litters was used. Five piglets from each litter were randomly assigned to the treated group and another five piglets to the control group. The treated animals received 10 ml of 15% clinoptilolite suspension three times: immediately after birth and subsequently at 12 and 24 hours after birth. Mean serum insulin level in the treated newborn piglets was almost 20% higher at both time intervals after treatment but the increases were not statistically significant, due to the high individual variation (44.40±6.33:36.40±5.14 and 17.54±2.61:14.02±1.14 mIU/L, treated vs. control at 10 and 30 hours postpartum). Serum levels of IGF-I were also increased in the treated newborn piglets, and the differences between means were statistically significant (18.20±0.63: 13.70±1.02 and 17.61±0.173:12.48±0.64 nmol/L, p<0.001, treated vs. control at 10 and 30 hours postpartum). Our results indicate that clinoptilolite treatment could effectively increase serum IGF-I and possibly also insulin levels in newborn piglets

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Skeletal muscle growth and protein turnover in neonatal boars and barrows

Cited by 14 publications

References 23 publications

The Effects of Caponization Age on Muscle Characteristics in Male Chicken

The Effects of Caponization Age on Muscle Characteristics in Male Chicken

Interaction of amino acids and insulin in the regulation of protein metabolism in growing animals

The serum levels of insulin and igf-i in newborn piglets treated with clinoptilolite

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