Effects of dietary protein levels on production performance and serum insulin-like growth factor-1 levels in sika deer

2012 ◽  
Vol 52 (8) ◽  
pp. 728 ◽  
Author(s):  
Fuhe Yang ◽  
Xiuhua Gao ◽  
Guangyu Li
Keyword(s):  
Growth Factor ◽  
Dietary Protein ◽  
Sika Deer ◽  
Serum Insulin ◽  
Growth Period ◽  
Bodyweight Gain ◽  
Production Performance ◽  
Insulin Like Growth Factor ◽  
Protein Levels ◽  
Antler Growth

The purpose of this study was to investigate the influence of dietary protein levels on the performance of sika deer. Twenty-four male sika deer were randomly assigned into three treatments, where they were fed a diet containing either 12, 16 or 20% crude protein (CP). During the antler growth period the average bodyweight gain in 12, 16 and 20% CP levels was 17.3, 19.9 and 14.4 kg, respectively; antler yield was 2224, 2518 and 2246 g, respectively. A significant positive relationship (P < 0.01) was found between serum insulin-like growth factor (IGF)-I concentration and bodyweight gain (P < 0.01) and antler yield (P < 0.01), using the regression equations: bodyweight gain (kg) = 0.06IGF-1 (ng/mL) – 52.14 (R2 = 0.69, n = 8) and antler yield (g) = 3.55IGF-1 (ng/mL) – 1659.4 (R2 = 0.77, n = 8), respectively. We concluded that 16% dietary protein was optimal for bodyweight gain and antler yield during the antler growth period in the sika deer.

Evidence That Pretranslational and Translational Defects Decrease Serum Insulin-Like Growth Factor-I Concentrations during Dietary Protein Restriction*

Endocrinology ◽  
1991 ◽  
Vol 129 (1) ◽  
pp. 429-435 ◽  
Author(s):  
JEAN-PAUL THISSEN ◽  
SANDRINE TRIEST ◽  
BILLIE M. MOATS-STAATS ◽  
LOUIS E. UNDERWOOD ◽  
TEKLA MAUERHOFF ◽  
...  
Keyword(s):  
Growth Factor ◽  
Dietary Protein ◽  
Serum Insulin ◽  
Protein Restriction ◽  
Insulin Like Growth Factor ◽  
Dietary Protein Restriction ◽  
Factor I ◽  
Growth Factor I

scholarly journals Dietary calcium supplementation affects nutrient digestibility and antler-production performance during the antler-velvet growth period of male sika deer

2019 ◽  
Vol 59 (9) ◽  
pp. 1689
Author(s):  
Weili Sun ◽  
Haiping Zhao ◽  
Kun Bao ◽  
Chunyi Li ◽  
Guangyu Li
Keyword(s):  
Sika Deer ◽  
Calcium Supplementation ◽  
Growth Period ◽  
Basal Diet ◽  
Optimal Level ◽  
Nutrient Digestibility ◽  
Production Performance ◽  
The Other ◽  
Feed Digestibility ◽  
Antler Growth

Effects of calcium (Ca) supplementation on nutrient digestibility, physiochemical characteristics and antler growth in farmed male sika deer were investigated. Eighteen sika deer (6 years old, 105.50 ± 5.05 kg) were assigned into the following three treatments where they had ad libitum access to water for 90 days: (1) control (C), basal diet containing 0.5% Ca; (2) Ca1.10, basal diet supplemented with 0.6% Ca; and (3) Ca1.70, basal diet supplemented with 1.2% Ca. The basal diet contained 0.50% Ca and 0.34% phosphorus (P). Each group consisted of the same ratio of Ca to P (provided as CaCO3 and CaHPO4). The results showed that the digestibility of dry matter (DM) and crude protein in the Ca1.70 group was lower than in the other two groups. The digestibilities of Ca, P and neutral detergent fibre in the Ca1.10 group were higher than those in the C group and Ca1.70 group (P &lt; 0.05). Concentrations of Ca and P in faeces increased with an increasing supplementation level of Ca and the highest concentrations were observed in the Ca1.70 group (P &lt; 0.05). There were no differences in the concentrations of parathyroid hormone, alkaline phosphatase and osteocalcin among the treatments. Testosterone and oestradiol concentrations of the Ca1.7 group were higher than those of the C and Ca1.10 groups (P &lt; 0.05). Average daily gains of fresh antler weight and dry antler weight of the groups Ca1.10 and Ca1.70 were greater than those of the C (P &lt; 0.05). Fresh and dry antler yields of the Ca1.10 group were higher than those of the other groups (P &lt; 0.05). In conclusion, optimal level of Ca supplement was found to be total Ca concentration of 1.10–1.70%, on the basis of DM, which significantly increased feed digestibility and antler daily gain for the 6-year-old sika deer.

scholarly journals Reduction of Serum Insulin-like Growth Factor-I by Dietary Protein Restriction Is Age Dependent

1989 ◽  
Vol 26 (5) ◽  
pp. 415-419 ◽  
Author(s):  
Therese Fliesen ◽  
Dominique Maiter ◽  
Guy Gerard ◽  
Louis E Underwood ◽  
Marc Maes ◽  
...  
Keyword(s):  
Growth Factor ◽  
Dietary Protein ◽  
Serum Insulin ◽  
Protein Restriction ◽  
Insulin Like Growth Factor ◽  
Dietary Protein Restriction ◽  
Factor I ◽  
Age Dependent ◽  
Growth Factor I

scholarly journals Associations of serum insulin-like growth factor-I and insulin-like growth factor-binding protein 3 levels with biomarker-calibrated protein, dairy product and milk intake in the Women's Health Initiative

2013 ◽  
Vol 111 (5) ◽  
pp. 847-853 ◽  
Author(s):  
Jeannette M. Beasley ◽  
Marc J. Gunter ◽  
Andrea Z. LaCroix ◽  
Ross L. Prentice ◽  
Marian L. Neuhouser ◽  
...  
Keyword(s):  
Growth Factor ◽  
Protein Intake ◽  
Serum Insulin ◽  
Dairy Product ◽  
Milk Intake ◽  
Insulin Like Growth Factor ◽  
Protein Levels ◽  
Health Initiative ◽  
Igf I ◽  
Igfbp 3

It is well established that protein–energy malnutrition decreases serum insulin-like growth factor (IGF)-I levels, and supplementation of 30 g of whey protein daily has been shown to increase serum IGF-I levels by 8 % after 2 years in a clinical trial. Cohort studies provide the opportunity to assess associations between dietary protein intake and IGF axis protein levels under more typical eating conditions. In the present study, we assessed the associations of circulating IGF axis protein levels (ELISA, Diagnostic Systems Laboratories) with total biomarker-calibrated protein intake, as well as with dairy product and milk intake, among postmenopausal women enrolled in the Women's Health Initiative (n 747). Analyses were carried out using multivariate linear regression models that adjusted for age, BMI, race/ethnicity, education, biomarker-calibrated energy intake, alcohol intake, smoking, physical activity and hormone therapy use. There was a positive association between milk intake and free IGF-I levels. A three-serving increase in milk intake per d (approximately 30 g of protein) was associated with an estimated average 18·6 % higher increase in free IGF-I levels (95 % CI 0·9, 39·3 %). However, total IGF-I and insulin-like growth factor-binding protein 3 (IGFBP-3) levels were not associated with milk consumption and nor were there associations between biomarker-calibrated protein intake, biomarker-calibrated energy intake, and free IGF-I, total IGF-I or IGFBP-3 levels. The findings of the present study carried out in postmenopausal women are consistent with clinical trial data suggesting a specific relationship between milk consumption and serum IGF-I levels, although in the present study this association was only statistically significant for free, but not total, IGF-I or IGFBP-3 levels.

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