Individual differences in responsiveness to diet-induced milk fat depression in dairy sheep and goats

2021 ◽  
Author(s):  
Antonella Della Badia ◽  
Gonzalo Hervás ◽  
Pablo G. Toral ◽  
Pilar Frutos
Keyword(s):  
Individual Differences ◽  
Milk Fat ◽  
Dairy Sheep ◽  
Milk Fat Depression ◽  
Sheep And Goats

scholarly journals Elucidating fish oil-induced milk fat depression in dairy sheep: Milk somatic cell transcriptome analysis

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
Aroa Suárez-Vega ◽  
Pablo G. Toral ◽  
Beatriz Gutiérrez-Gil ◽  
Gonzalo Hervás ◽  
Juan José Arranz ◽  
...  
Keyword(s):  
Fish Oil ◽  
Somatic Cell ◽  
Transcriptome Analysis ◽  
Milk Fat ◽  
Dairy Sheep ◽  
Milk Fat Depression ◽  
Sheep Milk ◽  
Cell Transcriptome

Liver X receptor α participates in LPS-induced reduction of triglyceride synthesis in bovine mammary epithelial cells

2020 ◽  
pp. 1-7
Author(s):  
Jianfa Wang ◽  
Shuai Lian ◽  
Jun Song ◽  
Hai Wang ◽  
Xu Zhang ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Epithelial Cells ◽  
Dairy Cow ◽  
Milk Fat ◽  
Mammary Epithelial Cells ◽  
Liver X Receptor ◽  
Mammary Epithelial ◽  
Triglyceride Synthesis ◽  
Milk Fat Depression ◽  
Liver X Receptor Α

Abstract Lipopolysaccharides (LPS) could induce milk fat depression via regulating the body and blood fat metabolism. However, it is not completely clear how LPS might regulate triglyceride synthesis in dairy cow mammary epithelial cells (DCMECs). DCMECs were isolated and purified from dairy cow mammary tissue and treated with LPS. The level of triglyceride synthesis, the expression and activity of the liver X receptor α (LXRα), enzymes related to de novo fatty acid synthesis, and the expression of the fatty acid transporters were investigated. We found that LPS decreased the level of triglyceride synthesis via a down-regulation of the transcription, translation, and nuclear translocation level of the LXRα. The results also indicated that the transcription level of the LXRα target genes, sterol regulatory element binding protein 1 (SREBP1), fatty acid synthetase (FAS), acetyl-CoA carboxylase-1 (ACC1), were significantly down-regulated in DCMECs after LPS treatment. Our data may provide new insight into the mechanisms of milk fat depression caused by LPS.

scholarly journals Isolation ofMycobacterium aviumsubspeciesparatuberculosisfrom non-ruminant wildlife living in the sheds and on the pastures of Greek sheep and goats

2007 ◽  
Vol 136 (5) ◽  
pp. 644-652 ◽  
Author(s):  
M. FLOROU ◽  
L. LEONTIDES ◽  
P. KOSTOULAS ◽  
C. BILLINIS ◽  
M. SOFIA ◽  
...  
Keyword(s):  
Type Strain ◽  
Insertion Sequence ◽  
Small Ruminants ◽  
Dairy Sheep ◽  
Chain Reaction ◽  
Tissue Samples ◽  
Sheep And Goats ◽  
Faecal Samples ◽  
Polymerase Chain ◽  
Type Strains

SUMMARYThis study aimed to: (1) investigate whether non-ruminant wildlife interfacing with dairy sheep and goats of four Greek flocks endemically infected withMycobacterium aviumsubspeciesparatuberculosis(MAP) harboured MAP and (2) genetically compare the strains isolated from the wildlife to those isolated from the small ruminants of these flocks. We cultured and screened, by polymerase chain reaction (PCR), pooled-tissue samples from 327 wild animals of 11 species for the MAP-specific IS900insertion sequence. We also cultured faecal samples from 100 sheep or goats from each of the four flocks. MAP was detected in samples from 11 sheep, 12 goats, two mice, two rats, a hare and a fox. Only one rat had histopathological findings. Genetic typing categorized 21 isolates as cattle-type strains and two, from a house mouse and a goat respectively, as sheep-type strains; this is the first report of a rodent harbouring a sheep-type strain. The MAP types that were most frequently isolated amongst the sheep and goats of each flock were also the ones isolated from sympatric rodents; those isolated from the fox and hare also belonged to the predominant ruminant strains.

scholarly journals Exploring polymorphisms and effects of candidate genes on milk fat quality in dairy sheep

2010 ◽  
Vol 93 (8) ◽  
pp. 3834-3845 ◽  
Author(s):  
A. Crisà ◽  
C. Marchitelli ◽  
L. Pariset ◽  
G. Contarini ◽  
F. Signorelli ◽  
...  
Keyword(s):  
Candidate Genes ◽  
Milk Fat ◽  
Dairy Sheep ◽  
Fat Quality

scholarly journals Scientific progress in ruminant production in the 1st decade of the XXI century

2010 ◽  
Vol 39 (suppl spe) ◽  
pp. 478-490 ◽  
Author(s):  
Geraldo Tadeu dos Santos ◽  
Daniele Cristina da Silva-Kazama ◽  
Ricardo Kazama ◽  
Helene V. Petit
Keyword(s):  
Milk Fat ◽  
Scientific Progress ◽  
Nutrient Requirements ◽  
Milk Fat Depression ◽  
Rumen Microbes ◽  
Transition Cows ◽  
Lactating Cows ◽  
Dietary Polyunsaturated Fatty Acids ◽  
Amino Acid Requirements ◽  
The Relationship

Scientific advances in nutrition of dairy cows in the first decade of the XXI century have occurred. This paper will review the most common additives fed to transition cows to decrease the incidence of metabolic disorders, which will be discussed separately with emphasis on their mechanisms of action, utilization and efficiency. Some changes on protein in the 2001 updated version of the Nutrient Requirements of Dairy Cattle to reach better precision of the nitrogen and amino acid requirements of lactating cows also are presented. Many of the advances in nutritional manipulation of milk fat concentration are related to fat supplementation, then the relationship between the action of rumen microbes on biohydrogenation of dietary polyunsaturated fatty acids and milk fatty acid profile are discussed as well as the main factors identified as being responsible for milk fat depression.

scholarly journals DAY-TO-DAY VARIATIONS IN FAT PERCENT OF COW'S MILK

1990 ◽  
Vol 70 (2) ◽  
pp. 731-734 ◽  
Author(s):  
A. S. ATWAL ◽  
J. D. ERFLE
Keyword(s):  
Dairy Cows ◽  
Key Words ◽  
Milk Yield ◽  
Milk Fat ◽  
Rumen Fluid ◽  
Supplemental Feeding ◽  
Fat Percentage ◽  
Milk Fat Depression ◽  
Daily Milk Yield ◽  
Daily Milk

Large day-to-day variations in milk fat, particularly for the morning milkings, were observed in 36 Holstein cows. Changes in percent fat were gradual and produced wavelike patterns in a number of instances. Supplemental feeding of long hay had no effect on acetate/propionate ratio in rumen fluid, daily milk yield or weighted milk fat percentage. Key words: Dairy cows, milk, fat depression, hay

Lipid Feeding and Milk Fat Depression

2014 ◽  
Vol 30 (3) ◽  
pp. 623-642 ◽  
Author(s):  
Thomas C. Jenkins ◽  
Kevin J. Harvatine
Keyword(s):  
Milk Fat ◽  
Milk Fat Depression

scholarly journals Effect of monensin on recovery from diet-induced milk fat depression

2014 ◽  
Vol 97 (4) ◽  
pp. 2376-2386 ◽  
Author(s):  
D.E. Rico ◽  
A.W. Holloway ◽  
K.J. Harvatine
Keyword(s):  
Milk Fat ◽  
Milk Fat Depression

SUPPLEMENTATION WITH PROTECTED LIPID AS A MEANS OF ALLEVIATING "SPRING PASTURE" INDUCED MILK FAT DEPRESSION

1979 ◽  
Vol 59 (4) ◽  
pp. 707-712 ◽  
Author(s):  
L. J. FISHER
Keyword(s):  
Milk Yield ◽  
Milk Fat ◽  
Experimental Period ◽  
Milk Fat Depression ◽  
Average Decrease ◽  
Lactating Cows ◽  
Percentage Unit ◽  
Fat Yield ◽  
Total Fat ◽  
Daily Milk

Thirty-six lactating cows, after their first week on spring pasture, were subdivided into three groups of 12 cows each and assigned to one of three pelleted grain mixtures containing 0, 5 or 10% protected lipid. These grain mixtures were fed in the milking parlor at the rate of 1.0 kg/4.0 kg of milk yield for a period of 14 days and then the cows were switched to the next ration in the sequence. Milk yield and grain intake were recorded daily. Milk samples for fat, protein and lactose determinations were taken during the last week of the drylot feeding period, during the preliminary pasture period and on the last 2 days of each experimental period. The change in feeding system from drylot to pasture resulted in an average decrease of 0.65 and 0.10 percentage units in milk fat and lactose contents, respectively, and an increase of 0.27 of a percentage unit in protein content. Refusals of the grain mixture were greater (P < 0.05) but milk yields per kilogram of grain intake were higher (P < 0.05) for grain mixtures containing 10% protected lipid than for the control ration. Protected lipid was not effective in countering the milk fat depression caused by the onset of the spring grazing season. The feeding of protected lipid at the rate of 5 and 10% resulted in only a 10 and 27% recovery in total fat yield compared to cows fed the control ration.

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