A note on the effect of use of bovine somatotropin on the fatty acid composition of the milk fat in dairy cows

1993 ◽  
Vol 57 (2) ◽  
pp. 319-322 ◽  
Author(s):  
P. Polidori ◽  
G. L. Maggi ◽  
V. M. Moretti ◽  
F. Valfrè ◽  
P. Navarotto
Keyword(s):  
Fatty Acids ◽  
Milk Fat ◽  
Considerable Increase ◽  
Bovine Somatotropin ◽  
Trans Isomers ◽  
Milk Fatty Acids ◽  
Recombinant Bovine Somatotropin ◽  
Cis And Trans Isomers ◽  
Cis And Trans ◽  
The Impact

Commencing on day 100 ± 10 of lactation, 10 Italian Friesian cows averaging 32·6 kg milk per day were injected biweekly with recombinant bovine somatotropin (BST), while 10 other cows averaging 33-4 kg milk per day were injected with a placebo. Cows were offered ad libitum a total mixed diet throughout the lactation. The experiment lasted 16 weeks; milk samples were taken before and 16, 62 and 91 days after the commencement of BST injection. The objective was to determine the impact of biweekly injections of BST on the synthesis and proportion of milk fatty acids, particularly on cis and trans isomers and on fatty acids with an odd number of carbon atoms (C15 and C17). A decrease in the proportion of shortchain (C4 to C14) fatty acids (P < 0·001) and an increase in the proportion of long-chain (C16 to C20) fatty acids (P < 0·001) were observed in the first period of the treatment. With regard to cis and trans isomers, a considerable increase of the cis isomers (P < 0·001), particularly C18.1cis9 (oleic acid) was observed, while differences in trans isomers were not statistically significant. Concentrations of C15 (pentadecanoic acid) were not affected but heptadecanoic acid (C17) concentration showed a considerable increase (P < 0·01) but only in the sample taken after 16 days.

scholarly journals Milk Fatty Acid Profiles in Different Animal Species: Focus on the Potential Effect of Selected PUFAs on Metabolism and Brain Functions

Nutrients ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 1111
Author(s):  
Maria P. Mollica ◽  
Giovanna Trinchese ◽  
Fabiano Cimmino ◽  
Eduardo Penna ◽  
Gina Cavaliere ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Human Health ◽  
Milk Fat ◽  
Animal Species ◽  
Essential Fatty Acids ◽  
In Vivo Studies ◽  
Omega 3 ◽  
Milk Fatty Acids ◽  
Brain Functions ◽  
The Impact

Milk contains several important nutrients that are beneficial for human health. This review considers the nutritional qualities of essential fatty acids (FAs), especially omega-3 (ω-3) and omega-6 (ω-6) polyunsaturated fatty acids (PUFAs) present in milk from ruminant and non-ruminant species. In particular, the impact of milk fatty acids on metabolism is discussed, including its effects on the central nervous system. In addition, we presented data indicating how animal feeding—the main way to modify milk fat composition—may have a potential impact on human health, and how rearing and feeding systems strongly affect milk quality within the same animal species. Finally, we have presented the results of in vivo studies aimed at supporting the beneficial effects of milk FA intake in animal models, and the factors limiting their transferability to humans were discussed.

Effect of weaning status on lipids of Galician Blond veal: Total fatty acids and 18:1 cis and trans isomers

Meat Science ◽  
2010 ◽  
Vol 86 (2) ◽  
pp. 357-363 ◽  
Author(s):  
Esperanza Bispo ◽  
Teresa Moreno ◽  
Alicia Latorre ◽  
Laura González ◽  
Pedro G. Herradón ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Total Fatty Acids ◽  
Cis And Trans

scholarly journals Quantitative aspects of fatty acid biohydrogenation, absorption and transfer into milk fat in the lactating goat, with special reference to the cis- and trans-isomers of octadecenoate and linoleate

1972 ◽  
Vol 130 (2) ◽  
pp. 607-617 ◽  
Author(s):  
R. Bickerstaffe ◽  
D. E. Noakes ◽  
E. F. Annison
Keyword(s):  
Small Intestine ◽  
Fatty Acid ◽  
Milk Fat ◽  
Complex Mixture ◽  
Quantitative Information ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Lactating Goats ◽  
Cis And Trans ◽  
Ruminal Biohydrogenation

1. Surgically prepared lactating goats were used to obtain quantitative information on the biohydrogenation and absorption of dietary fat, and on the mammary uptake and transfer into milk fat of the complex mixture of cis- and trans-isomers of octadecenoate that arise during ruminal biohydrogenation. 2. About 90% of dietary linolenate, linoleate and oleate was hydrogenated in the rumen, and the availability to the animals of the essential fatty acid, linoleate, represented only 0.5–1.5% of the total dietary energy. 3. The intra-ruminal administration of 14C-labelled linolenate and linoleate showed that these acids were not absorbed from the rumen, in agreement with previous work. 4. No selectivity was observed in the metabolism of the geometrical and positional isomers of octadecenoate: their rates of absorption from the small intestine, transfer into lymph, uptake by the mammary gland and appearance in milk fat were similar. 5. The desaturase activity of intestinal epithelium was demonstrated by the appearance in lymph of [1-14C]oleate after the addition of [1-14C]stearate to the small intestine.

An infra-red study of the cis- and trans-isomers of some c18 fatty acids

2007 ◽  
Vol 3 (10) ◽  
pp. 433-443 ◽  
Author(s):  
N. H. E. Ahlers ◽  
R. A. Brett ◽  
N. G. McTaggart
Keyword(s):  
Fatty Acids ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Infra Red ◽  
Cis And Trans

Effect of grazing fresh legumes or feeding silage on fatty acids and enzymes involved in the synthesis of milk fat in dairy cows

2010 ◽  
Vol 77 (3) ◽  
pp. 337-342 ◽  
Author(s):  
Lars Wiking ◽  
Peter K Theil ◽  
Jacob H Nielsen ◽  
Martin T Sørensen
Keyword(s):  
Fatty Acids ◽  
White Clover ◽  
Milk Fat ◽  
Fatty Acid Synthase ◽  
Red Clover ◽  
Mammary Tissue ◽  
Milk Fatty Acids ◽  
Milk Fat Globule ◽  
Fermentation Pattern ◽  
The Impact

The impact of fresh legume types or silage on the composition of milk fatty acids and transcription of enzymes involved in the synthesis of milk fat in cows was studied. Three groups of cows grazed high proportions of white clover, red clover and lucerne, respectively. A fourth group of cows was fed maize/grass silage. The cows grazing high proportions of legumes produced significantly more 18:1 trans-11, 18:2 cis9-trans11, 18:2 trans10-cis12 and 18:3 fatty acids than cows fed silage. White clover and lucerne grazing resulted in significantly lower output of 18:1 trans9 in milk than red clover grazing and maize/grass silages. Transcription of stearoyl-CoA desaturase (SCD) in mammary tissue was significantly increased by grazing high proportions of legume whereas fatty acid synthase and acetyl-CoA carboxylase were not affected by type of feeding. Furthermore, average milk fat globule diameter was correlated to daily milk fat yield but was not affected by feeding. Although the fresh forage affected the transcription of SCD in mammary tissue, the largest effects were on the trans11-based fatty acids. It is concluded that type of forage, i.e. fresh or silage, had a greater impact on rumen fermentation pattern than on transcription of enzymes involved in the synthesis of milk fat.

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