Lipids

, Volume 13, Issue 11, pp 814–819 | Cite as

Effect of feeding protected cholesterol on ruminant milk fat secretion

  • S. K. Gulati
  • L. J. Cook
  • J. R. Ashes
  • T. W. Scott
Article

Abstract

Feeding 1–2 g/day of cholesterol protected against ruminal hydrogenation caused a 20–30% drop in the secretion of milk fat by goats and cows. The effect was observed with goats fed conventional rations or with goats and cows fed rations supplemented with protected lipids, but was not observed with cows fed conventional rations, or when unprotected cholesterol and protected β-sitosterol was fed to these animals. The results suggest that this depression in milk fat is due to a decreased uptake of plasma triacylglycerol fatty acids by the mammary gland, induced by dietary cholesterol.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Larson, S.A., and L.H. Schultz, J. Dairy Sci. 53:1233 (1970).CrossRefGoogle Scholar
  2. 2.
    Bitman, J., L.P. Dryden, H.K. Goering, T.R. Wrenn, R.A. Yoncoskie, and L.F. Edmonson, J. Am. Oil Chem. Soc. 50:93 (1973).PubMedGoogle Scholar
  3. 3.
    Nestel, P.J., A. Poyser, R.L. Hood, S.C. Mills, M.R. Willis, L.J. Cook, and T.W. Scott, J. Lipid Res. (In press) (1978).Google Scholar
  4. 4.
    Gulati, S.K., J.R. Ashes, L.J. Cook, and T.W. Scott, Proc. Aust. Biochem. Soc. 9:21 (1976).Google Scholar
  5. 5.
    Ashes, J.R., S.K. Gulati, L.J. Cook, S.C. Mills, and T.W. Scott, J. Lipid Res. 19:244 (1978).PubMedGoogle Scholar
  6. 6.
    Rosenfeld, R.S., D.K. Fukushima, L. Hellman, and T.F. Gallagher, J. Biol. Chem. 211:301 (1954).PubMedGoogle Scholar
  7. 7.
    Scott, T.W., L.J. Cook, and S.C. Mills, J. Am. Oil Chem. Soc. 48:358 (1971).Google Scholar
  8. 8.
    Scott, T.W., and L.J. Cook, in “The Coronary Heart Disease and Dietary Fat Controversy,” N.Z. Soc. Anim. Prod., occ. publ. No. 2, 1973, p. 48.Google Scholar
  9. 9.
    Official Methods of Analysis of the AOAC, Washington, Edited by W. Horwitz, 1975, p. 247.Google Scholar
  10. 10.
    Official Methods of Analysis of the AOAC, Washington, Edited by W. Horwitz, 1975, p. 250.Google Scholar
  11. 11.
    Jones, E.P., and V.L. Davison, J. Am. Oil Chem. Soc. 42:121 (1965).Google Scholar
  12. 12.
    Technicon Method Publication N-24A. Technicon Corp., Ardsley (Chauncey), NY (1965).Google Scholar
  13. 13.
    Pan, Y.S., L.J. Cook, and T.W. Scott, J. Dairy Sci. 39:203 (1972).Google Scholar
  14. 14.
    Folley, S.J., and M.L. McNaught, in “Milk: the Mammary Gland and its Secretion,” Edited by S.K. Kon and A.T. Cowie, Academic Press, New York, 1961, p. 441.Google Scholar
  15. 15.
    West, C.W., R. Bickerstaffe, E.F. Annison, and J.L. Linzell, Biochem. J. 126:477 (1972).PubMedGoogle Scholar
  16. 16.
    Gulati, S.K., M.S. Thesis, Macquarie University, Sydney, p. 51 (1976).Google Scholar
  17. 17.
    Brumby, P.E., Biochem. J. 122:10 (1971).Google Scholar

Copyright information

© American Oil Chemists’ Society 1978

Authors and Affiliations

  • S. K. Gulati
    • 1
  • L. J. Cook
    • 1
  • J. R. Ashes
    • 1
  • T. W. Scott
    • 1
  1. 1.CSIRO Division of Animal ProductionBlacktownAustralia

Personalised recommendations