JDS
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Journal of Dairy Science Vol. 79 No. 9 1590-1595
© 1996 by American Dairy Science Association ®
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Gaynor, P. J.
Right arrow Articles by Waldo, D. R.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Gaynor, P. J.
Right arrow Articles by Waldo, D. R.

Glucose and Norepinephrine Challenges During the Abomasal Infusion of Cis or Trans Octadecenoates in Holstein Cows

P. J. Gaynor 1, R. A. Erdman 1, B. B. Teter 1, A. V. Capuco 2, and D. R. Waldo 2

1 University of Maryland, College Park 20742
2 USDA, Agricultural Research Service, Beltsville, MD 20705

This experiment determined the effects of infusion of mixtures of fat containing predominantly cis-C18:1 or trans-C18:1 fatty acids into the abomasum on responses of cows to glucose and norepinephrine challenges administered i.v. Six lactating Holstein cows, each with a rumen cannula, were arranged in two Latin squares with 21-d periods. The common basal diet contained 40% forage and 60% concentrate. Treatments were the uninfused control, 750 g/d of a cis fat mixture (65% high oleic sunflower oil and 35% cocoa butter), and 750 g/d of a trans fat mixture (93% shortening and 7% corn oil) infused into the abomasum via a tube that passed through the rumen cannula. Glucose challenges (0.4 mg/kg of BW, administered i.v.) were conducted on d 18, and norepinephrine challenges (0.7 µg/kg of BW, administered i.v.) were conducted on d 19 of each experimental period. Despite a lower percentage of fat in milk for trans than for cis treatment, disappearance rates of glucose, secretion of insulin after glucose challenge, and appearance rates of NEFA and triglycerides after norepinephrine challenge were similar between treatments. Thus, these data support the hypothesis that trans-C18:1 fatty acids affect the synthesis of milk fat in the mammary gland of lactating cows.

Key Words: glucose • norepinephrine • trans-C18:1 • fatty acids • milk fat depression

Submitted on October 4, 1995
Accepted on April 8, 1996




This article has been cited by other articles:


Home page
 J DAIRY SCIHome page
J. A. A. Pires, J. B. Pescara, A. E. Brickner, N. Silva del Rio, A. P. Cunha, and R. R. Grummer
Effects of Abomasal Infusion of Linseed Oil on Responses to Glucose and Insulin in Holstein Cows
J Dairy Sci, April 1, 2008; 91(4): 1378 - 1390.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
J. R. Roche, A. J. Sheahan, L. M. Chagas, and R. C. Boston
Short Communication: Change in Plasma Ghrelin in Dairy Cows Following an Intravenous Glucose Challenge
J Dairy Sci, March 1, 2008; 91(3): 1005 - 1010.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
K. J. Harvatine and M. S. Allen
Effects of Fatty Acid supplements on milk yield and energy balance of lactating dairy cows.
J Dairy Sci, March 1, 2006; 89(3): 1081 - 1091.
[Abstract] [Full Text] [PDF]

Home page
 J DAIRY SCIHome page
B. J. Bradford and M. S. Allen
Milk Fat Responses to a Change in Diet Fermentability Vary by Production Level in Dairy Cattle
J Dairy Sci, November 1, 2004; 87(11): 3800 - 3807.
[Abstract] [Full Text] [PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1996 by the American Dairy Science Association ®.