Relationship of Various Blood Metabolites to Voluntary Feed Intake in Lactating Ewes

Thye, Forrest W.; Warner, R.G.; Miller, Paul D.

doi:10.1093/jn/100.5.565

Cited by 44 publications

(14 citation statements)

References 22 publications

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“…Variations observed in postprandial concentrations of selected hormones and metabolites reflect some of the metabolic changes that an animal undergoes following feeding. Glucose concentration decreased following the meal, as previously reported in steers (Veira et al 1994), sheep (Bassett 1975) and in lactating ewes (Thye et al 1970). In ruminants, such a decrease most probably results from increased tissue uptake of glucose stimulated by the postprandial rise in insulin secretion coupled with a low portal absorption of glucose.…”

Section: Effect Of Feeding On Hormone and Metabolite Concentrationssupporting

confidence: 85%

Effect of feed restriction on plasma concentration of hormones and metabolites in steers fed grass silage

Ouellet¹,

Seoane²,

Bernier³

et al. 2001

Can. J. Anim. Sci.

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. 2001. Effect of feed restriction on plasma concentration of hormones and metabolites in steers fed grass silage. Can. J. Anim. Sci. 81: 553-561. Plasma concentrations of hormones and metabolites were measured in growing steers to establish their relation with degree of feed restriction. Sixty medium frame beef steers (259 ± 29 kg) were divided in groups of five and fed during 3 mo either timothy (T) or bromegrass (B) harvested at stem elongation of the first cut or at boot stage of the aftermath. Forages were fed at one of three levels of intake: ad libitum (FF), 80% of FF, or 65% of FF. Plasma concentrations of growth hormone (GH), insulin, glucagon, insulin-like growth factor-1 (IGF-1), glucose and nonesterfied fatty acids (NEFA) were measured on day 1 and day 78 before the morning meal. The effect of a meal on GH, insulin, glucagon, IGF-1, glucose and NEFA concentrations was also determined in 24 steers sampled from 3 h before to 3 h after a meal. Severity of feed restriction resulted in a linear decrease (P < 0.05) of plasma glucagon (0.139, 0.130, 0.121 ± 0.005 ng mL -1 ) and IGF-1 (109, 98, 84 ± 7 ng mL -1 ). Insulin concentration tended to be affected quadratically (0.37, 0.35, 0.27 ± 0.04 ng mL -1 for FF, 80% of FF and 65% of FF, respectively, P < 0.10). Ingestion of a meal resulted in a decrease (P < 0.05) of GH, NEFA and glucose, and an increase of insulin concentrations (P < 0.05). There was a positive correlation (r = 0.53, P < 0.05) between IGF-1 and average daily gain, and lipid percentage of carcasses suggesting that IGF-1 is related to growth rate and fat accumulation in growing steers. kg) ont été divisés en groupes de cinq et alimentés pour une période de trois mois avec de la fléole ou du brome récoltés au stade d'élongation de la première coupe ou au stade bouton du regain. Les fourrages ont été servis à un des trois niveaux suivants: à volonté (AV), 80% de AV, ou 65% de AV. Les concentrations plasmatiques de l'hormone de croissance (HC), de l'insuline, du glucagon, du IGF-1, du glucose et des acides gras non estérifiés (AGNE) ont été déterminés aux jours 1 et 78 avant le repas matinal. L'effet de l'ingestion du repas sur les niveaux plasmatiques de l'HC, de l'insuline, du glucagon, de l'IGF-1, du glucose et des AGNE a été aussi déterminé chez 24 bouvillons échantillonnés de 3 h avant à 3 h après un repas. La sévérité de la restiction alimentaire a causé une diminution linéaire (P < 0,05) de la concentration plasmatique de glucagon (0,139; 0,130; 0,121 ± 0,005 ng mL -1 ) et de l'IGF-1 (109; 98; 84 ± 7 ng mL -1 ) et tendait à affecter de façon quadratique la concentration de l'insuline (0,37; 0,35; 0,27 ± 0,04 ng mL -1 pour les groupes à AV, 80% de AV et 65% de AV, respectivement, P < 0,10). L'ingestion du repas a causé une diminution (P < 0,05) de la concentration de l'HC, des AGNE et du glucose tandis que la concentration de l'insuline augmentait (P < 0,05). Les concentrations d'IGF-1 était corrélée (r = 0,53, P < 0,05) avec le gain moyen quotidien et la composition lipidique des carcasses...

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Section: Effect Of Feeding On Hormone and Metabolite Concentrationssupporting

confidence: 85%

Effect of feed restriction on plasma concentration of hormones and metabolites in steers fed grass silage

Ouellet¹,

Seoane²,

Bernier³

et al. 2001

Can. J. Anim. Sci.

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“…As in other species, fasting induces an increase in the free fatty acid content in sheep plasma (Giinzel and Giesecke, 1974 ; Thompson, Gardner and Bell, 1975 ;Thye, Warner and Miller, 1970). Our results confirmed this pattern and showed that the increment occurred at the end of the first day, and thus 12 to 24 hrs before the increase of blood ketone bodies.…”

supporting

confidence: 90%

“…The same conclusion can apparently be drawn for fatty acid mobilization, and there is an evident relation between this mobilization and ketogenesis. Thye, Warner and Miller (1970) (Bates, Linn and Huen, 1976).…”

mentioning

confidence: 99%

Effects of fasting on blood composition and nitrogen losses in the adult sheep depending on previous diet and body weight

Bouchat¹,

Doizé²,

Paquay³

et al. 1980

Reprod. Nutr. Dévelop.

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Summary. In order to study the profiles of blood composition and nitrogen losses during fasting, groups of adult sheep that had previously received diets with variable intake levels were fasted during 8-day periods. A decrease in blood ketone concentration was observed during the first day, followed by a strong increase after 36 to 48 hrs. After The role of the ketone bodies and the protein reserves in meeting energy needs and in maintaining glycemia during fasting have been discussed.

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“…In order to determine the possible influence of fattening and food intake level, the direct effect of food ingestion on blood composition had to be eliminated as much as possible. To Warner and Miller (1970) described an increment after an initial fall. Some authors (Coggins and Field, 1976 ;Giinzel and Giesecke, 1974 ;Hart et al, 1975 ; Thye, Warner and Miller, 1970) observed a reduction of the FFA's after feeding, followed by a progressive rise.…”

Section: Introductionmentioning

confidence: 99%

“…To Warner and Miller (1970) described an increment after an initial fall. Some authors (Coggins and Field, 1976 ;Giinzel and Giesecke, 1974 ;Hart et al, 1975 ; Thye, Warner and Miller, 1970) observed a reduction of the FFA's after feeding, followed by a progressive rise. Rindsig and Schultz (1974) could not establish such a clear evolution, and neither could we from our results.…”

Section: Introductionmentioning

confidence: 99%

Diurnal changes in blood ketone bodies, glucose and lipids according to energy intake in adult sheep

Doizé¹,

Bouchat²,

Paquay³

1979

Ann. Biol. anim. Bioch. Biophys.

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Summary. In order to establish the daily evolution of different blood components according to energy intake in sheep, blood samples were taken every hour during three periods of 24 or 48 hrs. The animals were underfed, fed at maintenance level or fed ad libitum. A rapid increase of blood acetoacetate and !-hydroxybutyrate generally occurred 1 to 2 hrs after feeding. Daily fluctuations were larger in animals fed in a limited way than in those fed ad libitum. The mean daily blood concentration of ketone bodies depended more on individual differences than on the intake level. Food ingestion also induced an increase of glycemia, but it was not as evident as that of the ketone bodies and occurred later (3 or 4 hrs after feeding) ; glycemia also appeared to increase during the night. The level of food intake had no effect on mean blood glucose content nor on its evolution during the day. We could not conclude that there was an evolution of blood lipids in regard to their distribution, FFA content or FFA distribution during the day. It was also impossible to demonstrate an effect of food level intake on the blood lipids.Introduction.

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Relationship of Various Blood Metabolites to Voluntary Feed Intake in Lactating Ewes

Cited by 44 publications

References 22 publications

Effect of feed restriction on plasma concentration of hormones and metabolites in steers fed grass silage

Effect of feed restriction on plasma concentration of hormones and metabolites in steers fed grass silage

Effects of fasting on blood composition and nitrogen losses in the adult sheep depending on previous diet and body weight

Diurnal changes in blood ketone bodies, glucose and lipids according to energy intake in adult sheep

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