Plasma non-esterified fatty acids in sheep

Ef, Annison

doi:10.1071/ar9600058

Cited by 104 publications

(46 citation statements)

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“…There is also evidence that, as the concentration of glucose is increased, fat mobilization from adipose tissue is reduced (Annison, 1960;McClymont & Vallance, 1962). Possible mechanisms by which such effects may be brought about will be discussed later.…”

Section: Symposium Proceedings I 968mentioning

confidence: 99%

The amount and physical form of feed and milk secretion in the cow

Armstrong

1968

Proc. Nutr. Soc.

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Section: Symposium Proceedings I 968mentioning

confidence: 99%

The amount and physical form of feed and milk secretion in the cow

Armstrong

1968

Proc. Nutr. Soc.

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“…Plasma glucose was determined by the glucose oxidase method of Huggett and Nixon (1957); free fatty acids (FFA) by the method of Dole (1956), as modified by Annison (1960); and insulin and growth hormone by radio-immunoassay using talc to separate antibody-bound and free hormone (Rosselin et al 1966;Wallace and Bassett 1970). Sodium and potassium were determined by flame-photometry with an autoanalyser (Technicon Instruments Corp. N.Y.) and urea was determined on an autoanalyser by the method of Wilson (1966).…”

Section: (D) Analyticalmentioning

confidence: 99%

The Effects of Glucagon on Plasma Concentrations of Insulin. Growth Hormone, Glucose and Free Fatty Acids in Sheep: Comparison with the Effects of Catecholamines

Bassett¹

1971

Aust. Jnl. Of Bio. Sci.

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Glucagon, adrenaline, and isoprenaline were administered to adult sheep by intravenous infusion at a rate of 5 p.g/min for 2 hr.Plasma glucose concentration increased more rapidly during glucagon infusion than during infusion of either adrenaline or isoprenaline.Plasma insulin concentration increased rapidly during glucagon infusion, but the increase was less than that observed during infusion of isoprenaline. There was almost no increase in plasma insulin during infusion of adrenaline despite marked hyperglycaemia.Plasma growth hormone concentration increased during glucagon infusion, but high levels were not maintained. Both adrenaline and isoprenaline decreased growth hormone concentration.Plasma free fatty acid concentrations decreased during glucagon infusion. Plasma sodium and potassium concentrations also decreased but the plasma concentration of urea nitrogen was not altered during glucagon infusion.Intravenous infusion of glucagon at rates of 0·5 and O· 1 p.g/min for 2 hr also significantly increased plasma glucose, insulin, and growth hormone concentration and decreased plasma free fatty acid concentration. Infusion of glucagon at lower rates (0·05 and 0·01 p.g/min) had no significant effects.

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“…Ces derniEres recevaient des rations exp6rimentales contenant du propyldne-glycol et du glyc6rol; on a calcul6 les coefficients de corr6lation pour diverses combinaisons de paramdtres afin d'6valuer I'effet et la dose de I'additif sur la constance de ces rapports. Pour essayer d'expliquer la variation des rapports entre traitements, on a constitu6 deux groupes de 19 The concentration of free fatty acids (FFA) in the blood plasrna was slrggested by Annison (1960) (Reid and Hinks 1962b) control and fasted goats and cows (Radloff et al 1966) and in ketotic cows (Adler et al 1963;Rad1o1T and Schultz 1967). The regression of dietary energy deficit (Mcal/day) on blood components of normal cows during the 1st 2 wk of lactation has been estimated by Fisher et al (19'71).…”

mentioning

confidence: 99%

Interrelationships Between Blood Metabolites and an Evaluation of Their Use as Criteria of Energy Status of Cows in Early Lactation

Erfle¹,

Fisher²,

Sauer³

1974

Can. J. Anim. Sci.

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were found between these parameters in the control group. The correlations between blood glucose, acetoacetate and p-hydroxybutyrate and energy balance were very low. Plasma-free fatty acid levels were more closely associated with energy balance than were the other blood metabolites. When energy balance and free fatty acid correlations were compared for ketotic and control groups, only the control group showed a significant (P < 0.01) coefficient (r --0.42). The correlation between mean plasma-free fatty acids and mean body weight change over the experimental period for all animals, with time and treatment effects removed, was significant (r --0;54, P < 0.01). The estimated free fatty acid level at zero body weight change was 0.53 p eq per ml plasma. It is concluded that although free fatty acid levels are more sensitive than glucose as an indicator of energy status of the lactating cow, the excessive variability of this relationship during early Iactation drastically limits its usefulness.On a calcul6 les coefficients de corr6lation et de r6gression pour les m6tabolites' du sang, les composants du lait, le bilan 6nerg6tique et la valorisation de l'6nergie sur un total de 120 vaches. Ces derniEres recevaient des rations exp6rimentales contenant du propyldne-glycol et du glyc6rol; on a calcul6 les coefficients de cor-

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Plasma non-esterified fatty acids in sheep

Cited by 104 publications

References 0 publications

The amount and physical form of feed and milk secretion in the cow

The amount and physical form of feed and milk secretion in the cow

The Effects of Glucagon on Plasma Concentrations of Insulin. Growth Hormone, Glucose and Free Fatty Acids in Sheep: Comparison with the Effects of Catecholamines

Interrelationships Between Blood Metabolites and an Evaluation of Their Use as Criteria of Energy Status of Cows in Early Lactation

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