scholarly journals Dietary protein supplementation and its consequences for intake, digestion, and physical activity of a carnivorous marsupial, Sminthopsis crassicaudata

2018 ◽  
Vol 8 (7) ◽  
pp. 3636-3647 ◽  
Author(s):  
Lihong Yuan ◽  
Shawn Wilder ◽  
David Raubenheimer ◽  
Stephen J. Simpson ◽  
Michelle Shaw ◽  
...  
Keyword(s):  
Physical Activity ◽  
Dietary Protein ◽  
Protein Supplementation ◽  
Sminthopsis Crassicaudata ◽  
Carnivorous Marsupial

scholarly journals The effect of dietary protein on reproduction in the mare. VI. Serum progestagen concentrations during pregnancy

1998 ◽  
Vol 69 (4) ◽  
Author(s):  
F.E. Van Niekerk ◽  
C.H. Van Niekerk
Keyword(s):  
Dietary Protein ◽  
Protein Quality ◽  
Amino Acid Content ◽  
Protein Supplementation ◽  
The Other ◽  
Protein Diet ◽  
Sharp Decline ◽  
High Quality Protein ◽  
Essential Amino Acid Content

Sixty-four Thoroughbred and Anglo-Arab mares aged 6-12 years were used, of which 40 were non-lactating and 24 lactating. Foals from these 24 mares were weaned at the age of 6 months. Non-lactating and lactating mares were divided into 4 dietary groups each. The total daily protein intake and the protein quality (essential amino-acid content) differed in the 4 groups of non-lactating and 4 groups of lactating mares. The mares were covered and the effect of the quantity and quality of dietary protein on serum progestagen concentrations during pregnancy was studied. A sharp decline in serum progestagen concentrations was recorded in all dietary groups from Days 18 to 40 of pregnancy, with some individual mares reaching values of less than 4 ng/mℓ. Serum progestagen concentrations recorded in some of the non-lactating mares on the low-quality protein diet increased to higher values (p<0.05) than those of mares in the other 3 dietary groups at 35-140 days of pregnancy. A similar trend was observed for the lactating mares on a low-quality protein diet at 30-84 days of pregnancy. No such trends were observed in any of the other dietary groups. High-quality protein supplementation increased serum progestagen concentrations during the 1st 30 days of pregnancy. Lactation depressed serum progestagen concentrations until after the foals were weaned.

The effect of dietary protein supplementation on insulin-like growth factors (IGFs) and IGF-binding proteins in children with shigellosis.

1993 ◽  
Vol 77 (6) ◽  
pp. 1516-1521
Author(s):  
J B Pucilowska ◽  
M L Davenport ◽  
I Kabir ◽  
D R Clemmons ◽  
J P Thissen ◽  
...  
Keyword(s):  
Growth Factors ◽  
Dietary Protein ◽  
Binding Proteins ◽  
Protein Supplementation ◽  
Igf Binding Proteins ◽  
Igf Binding ◽  
Insulin Like Growth Factors

In silico investigation of the effect of nutrition on the estimates of genetic parameters for lambs infected with gastro-intestinal parasites

2007 ◽  
Vol 2007 ◽  
pp. 89-89
Author(s):  
A. B. Doeschl-Wilson ◽  
D. Vagenas ◽  
S.C. Bishop ◽  
I. Kyriazakis
Keyword(s):  
Dietary Protein ◽  
Genetic Parameters ◽  
Intestinal Parasites ◽  
Protein Supplementation ◽  
Gastrointestinal Parasites ◽  
Environment Interaction ◽  
Phenotypic Correlations ◽  
Nutritional Conditions ◽  
Breeding Programmes ◽  
Genetic And Phenotypic Correlations

In recent years there has been an increased interest for breeding lambs resistant to gastrointestinal parasites due to the reduced efficacy of anthelminthics. Furthermore, protein supplementation alleviates the adverse effects of parasitism since more protein is available for the satisfaction of the competing body functions of growth and resistance to parasites. Therefore, differences in dietary protein might result in the expression of genotype x environment interaction. Additionally the estimates of genetic and phenotypic correlations obtained from populations kept under different nutritional conditions might differ with implications for the breeding programmes. The aim here is to explore the effect of dietary protein level on the estimates of genetic and phenotypic correlations of a population of growing lambs infected with gastrointestinal parasites using a simulation model.

scholarly journals Impact of Meeting Different Guidelines for Protein Intake on Muscle Mass and Physical Function in Physically Active Older Women

Nutrients ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1156 ◽  
Author(s):  
Andreas Nilsson ◽  
Diego Montiel Rojas ◽  
Fawzi Kadi
Keyword(s):  
Physical Activity ◽  
Older Adults ◽  
Physical Function ◽  
Older Women ◽  
Muscle Mass ◽  
Dietary Protein ◽  
Protein Intake ◽  
Dietary Protein Intake ◽  
Physical Limitations

The role of dietary protein intake on muscle mass and physical function in older adults is important for the prevention of age-related physical limitations. The aim of the present study was to elucidate links between dietary protein intake and muscle mass and physical function in older women meeting current guidelines of objectively assessed physical activity. In 106 women (65 to 70 years old), protein intake was assessed using a 6-day food record and participants were classified into high and low protein intake groups using two Recommended Dietary Allowance (RDA) thresholds (0.8 g·kg−1 bodyweight (BW) and 1.1 g·kg−1 BW). Body composition, aerobic fitness, and quadriceps strength were determined using standardized procedures, and self-reported physical function was assessed using the SF-12 Health Survey. Physical activity was assessed by accelerometry and self-report. Women below the 0.8 g·kg−1 BW threshold had a lower muscle mass (p < 0.05) with no differences in physical function variables. When based on the higher RDA threshold (1.1 g·kg−1 BW), in addition to significant differences in muscle mass, women below the higher threshold had a significantly (p < 0.05) higher likelihood of having physical limitations. In conclusion, the present study supports the RDA threshold of 0.8 g·kg−1 BW of proteins to prevent the loss of muscle mass and emphasizes the importance of the higher RDA threshold of at least 1.1 g·kg−1 BW to infer additional benefits on constructs of physical function. Our study also supports the role of protein intake for healthy ageing, even in older adults meeting guidelines for physical activity.

scholarly journals Dietary Protein, Exercise, and Frailty Domains

Nutrients ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 2399 ◽  
Author(s):  
Josje D. Schoufour ◽  
Elvera Overdevest ◽  
Peter J. M. Weijs ◽  
Michael Tieland
Keyword(s):  
Physical Activity ◽  
Beneficial Effect ◽  
Dietary Protein ◽  
Protein Intake ◽  
Social Health ◽  
Physical Domain ◽  
Physical Frailty ◽  
Future Studies ◽  
Low Protein ◽  
The Impact

Increasing awareness of the impact of frailty on elderly people resulted in research focusing on factors that contribute to the development and persistence of frailty including nutrition and physical activity. Most effort so far has been spent on understanding the association between protein intake and the physical domain of frailty. Far less is known for other domains of frailty: cognition, mood, social health and comorbidity. Therefore, in the present narrative review, we elaborate on the evidence currently known on the association between protein and exercise as well as the broader concept of frailty. Most, but not all, identified studies concluded that low protein intake is associated with a higher prevalence and incidence of physical frailty. Far less is known on the broader concept of frailty. The few studies that do look into this association find a clear beneficial effect of physical activity but no conclusions regarding protein intake can be made yet. Similar, for other important aspects of frailty including mood, cognition, and comorbidity, the number of studies are limited and results are inconclusive. Future studies need to focus on the relation between dietary protein and the broader concept of frailty and should also consider the protein source, amount and timing.

Muscle protein turnover in the elderly and its potential contribution to the development of sarcopenia

2015 ◽  
Vol 74 (4) ◽  
pp. 387-396 ◽  
Author(s):  
Andrew J. Murton
Keyword(s):  
Amino Acids ◽  
Dietary Protein ◽  
Muscle Protein ◽  
The Elderly ◽  
Protein Supplementation ◽  
Potential Contribution ◽  
Anabolic Response ◽  
Peripheral Tissues ◽  
Present Evidence ◽  
Anabolic Resistance

The underlying aetiology of sarcopenia appears multifaceted and not yet fully defined, but ultimately involves the gradual loss of muscle protein content over time. The present evidence suggests that the loss of lean tissue in the elderly is exacerbated by low dietary protein intake. Moreover, acute stable-isotope-based methodologies have demonstrated that the muscle anabolic response to a given amount of protein may decline with age, a phenomenon that has been termed anabolic resistance. Although the mechanism responsible for the inability of muscle to mount a satisfactory anabolic response to protein provision with increasing age is presently unknown, it does not appear due to impaired digestion or absorption of dietary protein. Rather, the issue could reside with any combination of: a diminished delivery of amino acids to peripheral tissues, impaired uptake of amino acids into muscle cells, or an inability of amino acids to elicit intracellular events pivotal for anabolism to occur. Despite the presence of anabolic resistance to dietary protein, present evidence suggests that protein supplementation may be able to overcome these issues, particularly when combined with resistance exercise programmes. As such, protein supplementation may prove to be an effective approach to delay the loss of muscle mass with age and has led to calls for the recommended daily intake of protein to be increased for the elderly population.

Improvement in Hepatic Steatosis, Visceral Adiposity, and Appetite by High Dietary Protein Supplementation

2015 ◽  
Vol 110 ◽  
pp. S897-S898
Author(s):  
Jihane Benhammou ◽  
John Vu ◽  
Will Parsons ◽  
Leon Luong ◽  
Suwan Oh ◽  
...  
Keyword(s):  
Hepatic Steatosis ◽  
Dietary Protein ◽  
Protein Supplementation ◽  
Visceral Adiposity ◽  
High Dietary Protein

scholarly journals Skeletal Muscle Disuse Atrophy Is Not Attenuated by Dietary Protein Supplementation in Healthy Older Men

2014 ◽  
Vol 144 (8) ◽  
pp. 1196-1203 ◽  
Author(s):  
Marlou L. Dirks ◽  
Benjamin T. Wall ◽  
Rachel Nilwik ◽  
Daniëlle H.J.M. Weerts ◽  
Lex B. Verdijk ◽  
...  
Keyword(s):  
Skeletal Muscle ◽  
Dietary Protein ◽  
Older Men ◽  
Protein Supplementation ◽  
Disuse Atrophy ◽  
Muscle Disuse

Frequency of concentrate supplementation for cattle fed barley straw. 1. Effect on voluntary intake, ruminal straw disappearance, apparent digestibility and heat production

2004 ◽  
Vol 84 (3) ◽  
pp. 455-465 ◽  
Author(s):  
R. C. Tellier ◽  
G. W. Mathison ◽  
E. K. Okine ◽  
D. McCartney ◽  
R. Soofi-Siawash
Keyword(s):  
Heat Production ◽  
Dietary Protein ◽  
Protein Concentration ◽  
Protein Supplementation ◽  
High Protein ◽  
Barley Straw ◽  
Protein Concentrate ◽  
Apparent Digestibility ◽  
Feeding Frequency ◽  
Voluntary Intake

Five ruminally cannulated crossbred steers (474 ± 30 kg) were fed diets containing 70% barley straw and 30% concentrate in an unbalanced 5 × 5 Latin square design experiment to investigate the effects of frequency of feeding barley grain-based concentrates (daily, alternate days or every third day) with different dietary protein (7.9 and 11.5%) on voluntary intake of straw, ruminal disappearance of straw, apparent digestibility, and heat production. Neither frequency of feeding nor dietary protein concentration influenced voluntary intake of straw, nor did cattle eat differing amounts of straw on days when concentrate was fed in comparison with days when concentrate was not fed. Protein supplementation increased (P < 0.01) 24-h ruminal straw disappearance, but did not affect disappearances at other times. Concentrate feeding frequency had no influence on rate of ruminal disappearance of straw. Apparent digestibilities of dry matter, gross energy, acid detergent fibre (ADF) and crude protein were 5, 6, 8 and 33% higher (P < 0.05), respectively, in diets containing the high-protein concentrate, but were not affected by frequency of concentrate feeding. Heat production (kJ kg-0.75) tended to be reduced (P = 0.06) by 4% in steers fed concentrate on alternate days in comparison with steers fed concentrate daily. Dietary protein concentration had no influence on heat production even though digestible energy intake was 10% higher when the high protein concentrate diet was fed. It was concluded that concentrate can be fed every second day without any negative impact on intake and digestibility, with a possible benefit of a reduction in energy lost as heat. More research, however, is required to study the feasibility of feeding concentrate every third day. Key words: Cattle, straw, protein, feeding frequency, digestion, heat production

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