Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-20T04:49:04.134Z Has data issue: false hasContentIssue false
  • English
  • Français

Changes in propionate and glucose metabolism during synchronization of oestrus in ewes

Published online by Cambridge University Press:  27 March 2009

S. Wilson
S. Wilson
Affiliation:
Hill Farming Research Organisation, Bush Estate, Penicuik, Midlothian, EH26 0PY, Scotland
Get access Rights & Permissions [Opens in a new window]

Summary

Propionate and glucose metabolism were compared in two groups of Scottish Blackface ewes, one in which ewes had been fitted with vaginal pessaries impregnated with progesterone-analogue for the synchronization of oestrus and the other when ewes were in anoestrus. In ewes given the same amount of feed, the production rate of propionate increased significantly (P < 0·05) from 33 in anoestrous ewes to 44 gC/day in ewes with pessaries. The proportion of glucose-carbon apparently synthesized from propionate also increased significantly (P < 0·05) from 0·31 in anoestrous ewes to 0·44 in ewes with pessaries. The proportion of glucose-carbon apparently recycled was also significantly (P < 0·01) increased from 0·12 to 0·22. No changes were observed in glucose concentration, production rate or oxidation rate between the two groups of ewes.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 103 , Issue 2 , October 1984 , pp. 317 - 321
Copyright
Copyright © Cambridge University Press 1984

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Baird, G. D., Van Der Walt, J. G. & Bergman, E. N. (1983). Whole-body metabolism of glucose and lactate in productive sheep and cows. British Journal of Nutrition 50, 249–265.CrossRefGoogle ScholarPubMed
Bergman, E. N. (1973). Glucose metabolism in ruminants as related to hypoglycaemia and ketosis. Cornell Veterinarian 63, 341–382.Google Scholar
Bertoli, A., De Pirro, R., Fusco, A., Greco, A., Magnatta, R. & Lauro, R. (1980). Differences in insulin receptors between men and menstruating women and influence of sex hormones on insulin binding during the menstrual cycle. Journal of Clinical Endocrinology and Metabolism 50, 246–250.CrossRefGoogle ScholarPubMed
Brockman, R. P. (1978). In vivo effects of glucagon on gluconeogenesis in fed sheep. Federation Proceedings 37, 339.Google Scholar
Brockman, R. P. (1983). Effects of insulin and glucose on the production and utilisation of glucose dn sheep. Comparative Biochemistry and Physiology 74, 681–685.CrossRefGoogle Scholar
Brockman, R. P., Bergman, E. N., Pollak, W. L. & Brondum, J. (1975). Studies of glucose production in sheep using (6-3H) glucose and (U-14C) glucose. Canadian Journal of Physiology and Pharmacology 53, 1186–1189.CrossRefGoogle ScholarPubMed
Brockman, R. P. & Greer, C. (1980). Effects of somatostatin and glucagon on the utilisation of (2-14C) propionate in glucose production in vivo in sheep. Australian Journal of Biological Sciences 33, 457–464.CrossRefGoogle Scholar
Dunn, A., Chenoweth, M. & Schaeffer, L. D. (1967). Estimation of glucose turnover and the Cori cycle using glucose-6-t-14C. Biochemistry 6, 6–11.CrossRefGoogle ScholarPubMed
Dunn, T. G., Hopwood, M. L., House, W. A. & Faulkner, L. C. (1972). Glucose metabolism and plasma progesterone and corticords during the estrus cycle of ewes. American Journal of Physiology 222, 468–473.CrossRefGoogle ScholarPubMed
Emady, M., Hadley, J. C, Noakes, D. E. & Arthur, G. H. (1974). Progesterone levels in the peripheral blood of pregnant ewes. Veterinary Record 24, 168–169.CrossRefGoogle Scholar
Fylling, P. (1970). The effect of pregnancy ovariectomy and parturition on plasma progesterone levels in sheep. Acta Endocrinologica 65, 273–283.Google ScholarPubMed
Harrison, D. G. & McAllan, A. B. (1980). Factors affecting microbial growth yields in the reticulorumen. In Digestive Physiology and Metabolism in Ruminants (ed. Ruckebusch, Y. and Thivend, P.), pp. 205–226. Lancaster: MTP Press.CrossRefGoogle Scholar
Lindsay, D. B. (1970). Carbohydrate metabolism in ruminants. In Physiology of Digestion and Metabolism in the Ruminant (ed. Phillipson, A. T.), pp. 438–451. Newcastle: Oriel Press.Google Scholar
Lindsay, D. B. (1978). Gluconeogenesis in ruminants. Biochemical Society Transactions 6, 1152–1156.CrossRefGoogle ScholarPubMed
MacRae, J. C. & Wilson, S. (1978).Problems associated with scintillation counting of NaH14CO3 and gel suspension counting of Ba14CO3. International Journal of Applied Radiation and Isotopes 29, 191–195.CrossRefGoogle Scholar
Mauleon, P. (1979).Manipulation of the breeding cycle. In Sheep Breeding, 2nd edn (ed. Tomes, G. J., Robertson, D. E., Lightfoot, R. J. and Haresign, W.), pp. 439–449. London: Butterworths.CrossRefGoogle Scholar
Mayes, R. W., Lamb, C. S. & Colgrove, P. M. (1983). Attempts at improving the estimation of ruminal volatile fatty acid production rate in sheep. Proceedings of the Nutrition Society 42, 132A.Google Scholar
Robinson, T. J. (1979). Controlled breeding of sheep and goats. In Sheep Breeding, 2nd edn (ed. Tomes, G. J., Robertson, D. E., Lightfoot, R. J. and Haresign, W.), pp. 423–437. London: Butterworths.CrossRefGoogle Scholar
Samad, A. R. & Ford, E. J. H. (1981). The effects of progestorone on glucose and lactate metabolism in ovariectomised sheep. Quarterly Journal of Experimental Physiology 66, 73–80.CrossRefGoogle Scholar
Thompson, J. R. (1971). Gluconeogenesis from propionate in the lactating cow. Ph.D. thesis, Univorsity of California, Davis, U.S.A.Google Scholar
Wilson, S. (1982). Glucose metabolism in hill sheep. Ph.D. thesis, University of Nottingham.Google Scholar
Wilson, S., MacRae, J. C. & Buttery, P. J. (1979). The effects of implanting jugular catheters on plasma glucose concentrations in wethers fed two extremes of diet. Research in Veterinary Science 26, 256–258.CrossRefGoogle ScholarPubMed
Wilson, S., MacRae, J. C. & Buttery, P. J. (1981). Comparison of measurements of glucose flux rates in wethers and in pregnant and lactating ewes using 14C and 3H labelled tracers. Research in Veterinary Science 30, 205–212.CrossRefGoogle ScholarPubMed
Wilson, S., MacRae, J. C. & Buttery, P. J. (1983). Glucose production and utilisation in non-pregnant and lactating ewes. British Journal of Nutrition 50, 303–316.CrossRefGoogle ScholarPubMed
Young, J. W. (1977). Gluconeogenosis in cattle: significance and methodology. Journal of Dairy Science 60,1–15.CrossRefGoogle ScholarPubMed