Skip to main content Accessibility help
×
Home

Protein utilization during energy undernutrition in sheep sustained by intragastric infusion: effects of protein infusion level, with or without sub-maintenance amounts of energy from volatile fatty acids, on energy and protein metabolism

  • S. A. Chowdhury (a1), E. R. Ørskov (a1), F. D. DeB. Hovell (a1), J. R. Scaife (a2) and G. Mollison (a1)...

Abstract

Utilization of endogenous and exogenous energy for protein accretion during energy undernutrition has been studied. Nine lambs nourished by intragastric infusion were given either progressively increasing or decreasing amounts of casein-N up to 2550 mg/kg metabolic weight (W0·75), with or without 250 kJ/kg W0·75 of volatile fatty acids daily. Energy balance (respiration calorimetry) and N balance were measured. While all experimental animals were in negative energy balance, N balance increased curve-linearly with the increase in casein-N infusion and attained positive N balance. Endogenous energy (presumably body fat) was found to meet the energy needs for protein accretion during energy undernutrition. It is concluded that body fat can be effectively utilized to support lean-tissue growth during energy undernutrition, so that the classical nutritional concept of dietary energy:protein ratio is only meaningful when both endogenous and exogenous energy are considered.

    • Send article to Kindle

      To send this article to your Kindle, first ensure no-reply@cambridge.org is added to your Approved Personal Document E-mail List under your Personal Document Settings on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part of your Kindle email address below. Find out more about sending to your Kindle. Find out more about sending to your Kindle.

      Note you can select to send to either the @free.kindle.com or @kindle.com variations. ‘@free.kindle.com’ emails are free but can only be sent to your device when it is connected to wi-fi. ‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.

      Find out more about the Kindle Personal Document Service.

      Protein utilization during energy undernutrition in sheep sustained by intragastric infusion: effects of protein infusion level, with or without sub-maintenance amounts of energy from volatile fatty acids, on energy and protein metabolism
      Available formats
      ×

      Send article to Dropbox

      To send this article to your Dropbox account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Dropbox.

      Protein utilization during energy undernutrition in sheep sustained by intragastric infusion: effects of protein infusion level, with or without sub-maintenance amounts of energy from volatile fatty acids, on energy and protein metabolism
      Available formats
      ×

      Send article to Google Drive

      To send this article to your Google Drive account, please select one or more formats and confirm that you agree to abide by our usage policies. If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your <service> account. Find out more about sending content to Google Drive.

      Protein utilization during energy undernutrition in sheep sustained by intragastric infusion: effects of protein infusion level, with or without sub-maintenance amounts of energy from volatile fatty acids, on energy and protein metabolism
      Available formats
      ×

Copyright

References

Hide All
Agricultural Research Council (1980). The Nutrient Requirements of Farm Livestock. Slough: Commonwealth Agricultural Bureaux.
Atkinson, T., Fowler, V. R., Garton, G. A. & Lough, A. K. (1972). A rapid method for accurate determination of lipid in animal tissue. Analyst 97, 562568.
Balch, C. C. (1967). Problems in predicting the role of non-protein nitrogen as a substitute for protein in rations for farm ruminants. World Review of Animal Production 3, 8491.
Bergman, E. N. (1973). Glucose metabolism in ruminants as related to hypoglycemia and ketosis. Cornell Veterinarian 63, 341382.
Black, J. L. & Griffiths, D. A. (1975). The effect of live weight and energy intake on nitrogen balance and total nitrogen requirements of lambs. British Journal of Nutrition 33, 339413
Brockway, J. M. (1987). Influence of Activity. Rowett Research Institute Report. Aberdeen: Rowett Research Institute.
Campbell, R. G. (1988). Nutritional constraints to lean tissue accretion in farm animals. Nutrition Research Reviews 1, 233253.
Chowdhury, S. A. (1989). Energy and protein metabolism during undernutrition. MSc Thesis, University of Aberdeen.
Chowdhury, S. A. (1992). Protein utilization during energy undernutrition in sheep. PhD Thesis, University of Aberdeen.
Chowdhury, S. A., Ørskov, E. R. & MacLeod, N. A. (1990). Protein utilization during energy undernutrition in steers. Proceedings of the Nutrition Society 49, 208A.
Davidson, J., Matheison, J. & Boyne, A. W. (1970). The use of automation in determining nitrogen in Kjeldahl method with final calculation by computer. Analyst 95, 181193.
Fuller, M. F. & Croft, M. (1977). The protein sparing effect of carbohydrate. Nitrogen retention of the growing pig in relation to diet. British Journal of Nutrition 39, 479488.
Garlick, P. J., Clugston, G. A. & Waterlow, J. C. (1980). Influence of low energy diets on whole body protein turnover in obese subjects. American Journal of Physiology 238, E235–E244.
Hovell, F. D. DeB., ørskov, E. R., Kyle, D. & MacLeod, N. A. (1983). Basal urinary nitrogen excretion and growth response to supplemental protein by lambs close to energy equilibrium. British Journal of Nutrition 50. 173187.
Krebs, H. A. (1964). The metabolic fate of amino acids. In Mammalian Protein Metabolism, pp. 125176 [Munro, H. N. and Allison, J. N., editors]. New York: Academic Press.
Ku Vera, J. C. (1988). Energy and N metabolism in cattle nourished by intragastric infusion of nutrients. PhD Thesis, University of Aberdeen.
Leat, W. M. F. (1983). Adipose tissue and structural lipid. In Dynamic Biochemistry of Animul Production. World Animal Science A, pp. 109136 [Riis, P. M., editor]. Amsterdam, Oxford, New York, Tokyo: Elsevier.
Livesey, G. (1984). The energy equivalents of ATP and the energy values of food proteins and fats. British Journal of Nutrition 51, 1528.
Lobley, G. E. (1990). Energy metabolism reactions in ruminant muscle: response to age, nutrition and hormonal status. Reproduction Nutrition and Development 30, 1334.
Lobley, G. E., Connell, A. & Buchan, V. (1987). Effect of food intake on energy and protein metabolism in finishing beef steers. British Journel of Nutrition 57, 457465.
MacLeod, N. A., Corrigal, W., Striton, R. A. & Ørskov, E. R. (1982). Intragastric infusion of nutrients in cattle. British Journal of Nutrition 47, 547552.
Madsen, A. (1983). The molecular basis of animal production: metabolism in liver cells. In Dynamic Biochemistry of Animal Production. World Animal Science, A, pp. 5374 [Riis, P. M., editor]. Amsterdam, Oxford, New York, Tokyo: Elsevier.
Marliss, E. B., Murry, F. T. & Nakhooda, A. F. (1978). The metabolic response to hypocaloric protein diets in obese man. Journal of Clinical Investigation 62. 468479.
Oldham, J. D. (1984). Protein-energy interrelationship in dairy cows. Journal of Dairy Science 10, 10901114.
Ørskov, E. R. (1982). Protein Nutrition in Ruminants. London: Academic Press.
Ørskov, E. R., Grubb, D. A., Wenham, G. & Corrigal, W. (1979). The sustenance of growing and fattening ruminants by intragastric infusion of volatile fatty acids and protein. British Journal of Nutrition 41, 553558.
Ørskov, E. R. & Hovell, F. D. DeB. (1986). Protein metabolism and utilization during undernutrition in ruminants. In Nuclear and Related Techniques in Animal Production Health, pp. 429438. Vienna: International Atomic Energy Agency.
Ørskov, E. R., MacLeod, N. A., Fahmy, S. T. M., Istasse, L. A. & Hovell, F. D. DeB (1983). Investigation of nitrogen balance in dairy cows and steers nourished by intragastric infusion. Effect of submaintenance energy input with or without protein. British Journal of Nutrition 50, 99107.
Sidhu, K. S., Emery, R. S., Parr, A. F. & Merkel, R. A. (1973). Fat mobilization lipase in relation to fatness in lambs. Journal of Animal Science 36, 658662.
Technicon Instrument Co. Ltd (1967). Technicon Autoanalyser Methodology Urea-N. Sheet no. N-1C. Terrytown: Technicon Instrument Corporation.
Winterer, J., Bistrian, B. R., Bilmazes, C., Blackburn, G. L. & Young, V. R. (1980). Whole body protein turnover study with 15N-glycine and muscle protein breakdown in mildly obese subjects during a protein sparing diet and a brief total fast. Metabolism 29, 575581.

Keywords

Protein utilization during energy undernutrition in sheep sustained by intragastric infusion: effects of protein infusion level, with or without sub-maintenance amounts of energy from volatile fatty acids, on energy and protein metabolism

  • S. A. Chowdhury (a1), E. R. Ørskov (a1), F. D. DeB. Hovell (a1), J. R. Scaife (a2) and G. Mollison (a1)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed