scholarly journals Effects of nutrient restriction on mammary cell turnover and mammary gland remodeling in lactating dairy cows

2011 ◽  
Vol 94 (9) ◽  
pp. 4623-4635 ◽  
Author(s):  
F. Dessauge ◽  
V. Lollivier ◽  
B. Ponchon ◽  
R. Bruckmaier ◽  
L. Finot ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Dairy Cows ◽  
Nutrient Restriction ◽  
Cell Turnover ◽  
Lactating Dairy Cows ◽  
Mammary Cell

Effects of two different forage sources on mammary gland growth, mammary cell turnover and activity in early lactation dairy cows

2015 ◽  
Vol 55 (5) ◽  
pp. 630 ◽  
Author(s):  
Tong Qin ◽  
Haoyu Wang ◽  
Dengpan Bu ◽  
Haisheng Hao ◽  
Dong Wang ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Mammary Gland ◽  
Dairy Cows ◽  
Milk Proteins ◽  
Secretory Activity ◽  
Early Lactation ◽  
Cell Turnover ◽  
Mammary Cell ◽  
Proliferation And Apoptosis ◽  
Dietary Treatments

The objective of this study was to evaluate the effects of two different forage sources on mammary gland growth, mammary cell turnover and activity in early lactation dairy cows. Twelve early lactation cows were randomly assigned to a CS (33.8% corn straw as sole forage) or MF diet (3.7% Chinese wildrye + 28.4% alfalfa hay + 26.5% corn silage as mixed forage). All cows were fed from Week –3 to Week 8, and mammary biopsies were taken on 16 days postpartum. Mammary cell proliferation and apoptosis were determined by immunohistology, and genes expression in mammary were detected by real-time PCR. Results showed that cell proliferation, gene expression of milk proteins and proteins involved in the synthesis of milk components did not differ between two dietary treatments (P > 0.05). However, cows fed the MF diet had a higher IGF-1 receptor (IGF-1R) expression (P = 0.02), and lower rate of cell apoptosis (P = 0.003) relative to cows fed the CS diet. Collectively, these results suggest that the mammary secretory activity probably was not affected by the dietary treatments, but high quality and mixed forages led to the increased expression of IGF-1R and a larger number of cells in mammary glands, which may be responsible for the higher milk production in early lactation dairy cows.

445 Toxy-Nil and Unike Plus modulate differences in gene expression of milk somatic cells isolated from mammary gland of lactating dairy cows fed aflatoxin B1

2017 ◽  
Vol 95 (suppl_4) ◽  
pp. 218-219
Author(s):  
R. O. Rodrigues ◽  
R. O. Rodrigues ◽  
D. R. Ledoux ◽  
G. E. Rottinghaus ◽  
R. Borutova ◽  
...  
Keyword(s):  
Gene Expression ◽  
Mammary Gland ◽  
Dairy Cows ◽  
Aflatoxin B1 ◽  
Somatic Cells ◽  
Lactating Dairy Cows ◽  
Milk Somatic Cells

The role of the mammary gland during heat stress

2019 ◽  
Author(s):  
◽  
Ricardo Oliveira Rodrigues
Keyword(s):  
Blood Flow ◽  
Heat Stress ◽  
Mammary Gland ◽  
Dairy Cows ◽  
Prolonged Exposure ◽  
Transcriptional Profiling ◽  
Mammary Tissue ◽  
Secretory Cells ◽  
University Of Missouri ◽  
Lactating Dairy Cows

[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Disruptive effects of climate change, such as increasing environmental temperature, have direct impacts on economic viability and efficiency of food production. In lactating dairy cows, heat stress reduces milk production and alters function of mammary secretory cells, at least partly by disturbing local protein metabolism. We hypothesized that hyperthermia would not only reduce mammary blood flow but would also reduce mammary extraction of nutrients from blood. In addition, we hypothesized that transcriptional profiling of mammary tissue would reveal disruption of cellular homeostasis. Our objective was to determine the effects of hyperthermia on mammary function. More specifically, we aimed to profile mammary blood flow and the changes in mammary transcriptome of heat-stressed lactating dairy cows. We investigated the effects of early and prolonged exposure of lactating dairy cows to hyperthermia by exposing cows to programmed constantly elevated temperature and humidity to induce and maintain body temperature approximately 1[degree]C above normal. Experiments were conducted to evaluate the production responses of hyperthermic lactating dairy cows, to characterize total and nutritive mammary blood flow, and to elucidate the regulation of mammary function during early and prolonged exposure to hyperthermia. Results from these studies established that 1) hyperthermia reduces total and nutritive mammary blood flow, limiting nutrient disappearance across the mammary gland; 2) hyperthermia does not induce shunting of blood away from the gland; 3) hyperthermia affects mammary tissue transcriptome, mainly altering processes associated with ECM and cell adhesion; 4) the effects of exposure to prolonged heat stress on mammary gene expression are distinct from the effects of feed restriction, in lactating dairy cows; and 5) mammary function is reestablished within 8 days after cessation of heat stress.

scholarly journals Effect of pregnancy and feeding level on cell turnover and expression of related genes in the mammary tissue of lactating dairy cows

animal ◽  
2008 ◽  
Vol 2 (4) ◽  
pp. 588-594 ◽  
Author(s):  
J.V. Nørgaard ◽  
M.T. Sørensen ◽  
P.K. Theil ◽  
J. Sehested ◽  
K. Sejrsen
Keyword(s):  
Dairy Cows ◽  
Mammary Tissue ◽  
Cell Turnover ◽  
Feeding Level ◽  
Lactating Dairy Cows

scholarly journals Duodenal Infusions of Palmitic, Stearic or Oleic Acids Differently Affect Mammary Gland Metabolism of Fatty Acids in Lactating Dairy Cows

1998 ◽  
Vol 128 (9) ◽  
pp. 1525-1532 ◽  
Author(s):  
Francis Enjalbert ◽  
Marie-Claude Nicot ◽  
Corine Bayourthe ◽  
Raymond Moncoulon
Keyword(s):  
Fatty Acids ◽  
Mammary Gland ◽  
Dairy Cows ◽  
Lactating Dairy Cows

scholarly journals Supplements of vitamins B9 and B12 affect hepatic and mammary gland gene expression profiles in lactating dairy cows

BMC Genomics ◽  
2016 ◽  
Vol 17 (1) ◽  
Author(s):  
Bazoumana Ouattara ◽  
Nathalie Bissonnette ◽  
Melissa Duplessis ◽  
Christiane L. Girard
Keyword(s):  
Gene Expression ◽  
Mammary Gland ◽  
Dairy Cows ◽  
Expression Profiles ◽  
Gene Expression Profiles ◽  
Lactating Dairy Cows

scholarly journals The Effect of Supplementary Protein on In Vivo Metabolism of the Mammary Gland in Lactating Dairy Cows

1994 ◽  
Vol 77 (7) ◽  
pp. 1816-1827 ◽  
Author(s):  
J.A. Metcalf ◽  
D.E. Beever ◽  
J.D. Sutton ◽  
D. Wray-Cahen ◽  
R.T. Evans ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Dairy Cows ◽  
In Vivo Metabolism ◽  
Lactating Dairy Cows

scholarly journals Duodenal infusion of α-linolenic acid affects fatty acid metabolism in the mammary gland of lactating dairy cows

2012 ◽  
Vol 95 (10) ◽  
pp. 5821-5830 ◽  
Author(s):  
G. Yang ◽  
D.P. Bu ◽  
J.Q. Wang ◽  
Khas-Erdene ◽  
L.Y. Zhou ◽  
...  
Keyword(s):  
Mammary Gland ◽  
Fatty Acid ◽  
Dairy Cows ◽  
Linolenic Acid ◽  
Fatty Acid Metabolism ◽  
Acid Metabolism ◽  
Lactating Dairy Cows

scholarly journals Evaluation of Whole Blood and Plasma in the Interorgan Supply of Free Amino Acids for the Mammary Gland of Lactating Dairy Cows

2000 ◽  
Vol 83 (6) ◽  
pp. 1300-1309 ◽  
Author(s):  
T.R. Mackle ◽  
D.A. Dwyer ◽  
K.L. Ingvartsen ◽  
P.Y. Chouinard ◽  
D.A. Ross ◽  
...  
Keyword(s):  
Amino Acids ◽  
Mammary Gland ◽  
Dairy Cows ◽  
Whole Blood ◽  
Free Amino Acids ◽  
Free Amino ◽  
Lactating Dairy Cows
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