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Copper excess induces autophagy dysfunction and mitochondrial ROS-ferroptosis progression, inhibits cellular biosynthesis of milk protein and lipid in bovine mammary epithelial cells.
Ecotoxicol Environ Saf
January 2025
College of Animal Science, Jilin University, Jilin Provincial Key Laboratory of Livestock and Poultry Feed and Feeding In Northeastern Frigid Area, Changchun 130062, China. Electronic address:
Excessive copper (Cu) has the potential risk to ecosystems and organism health, with its impact on dairy cow mammary glands being not well-defined. This study used a bovine mammary epithelial cell (MAC-T) model to explore how copper excess affects cellular oxidative stress, autophagy, ferroptosis, and protein and lipid biosynthesis in milk. Results showed the increased intracellular ROS, MDA, and CAT (P < 0.
View Article and Find Full Text PDFTissue-specific responses to oxidative fuel source preference during heat stress in lactating dairy cows.
JDS Commun
January 2025
School of Animal Sciences, Virginia Tech, Blacksburg, VA 24061.
Prolonged exposure to high environmental temperatures results in an accumulated heat load that induces a heat stress (HS) response in dairy cattle. Heat stress compromises dairy farm profitability by reducing milk yield, altering milk composition, and hindering reproductive performance. The ability to alternate between carbohydrate and lipid sources for energy production is termed metabolic flexibility (Met Flex).
View Article and Find Full Text PDFThe PI4K2A gene positively regulates lipid synthesis in bovine mammary epithelial cells and attenuates the inhibitory effect of t10,c12-CLA on lipid synthesis.
Sci Rep
January 2025
College of Animal Science and Technology, Ningxia Key Laboratory of Ruminant Molecular and Cellular Breeding, Ningxia University, Yinchuan, 750021, China.
Currently, the identification of valuable candidate genes affecting milk fat synthesis in dairy cows is still limited, and the specific regulatory mechanism is still unknown. In this study, we used primary bovine mammary epithelial cells(BMECs)as a model and utilized overexpression and knockdown techniques for the PI4K2A gene to investigate the specific mechanisms by which it regulates lipid metabolism in BMECs. We studied whether PI4K2A regulates the inhibition of trans-10, cis-12 conjugated linoleic acid (t10,c12-CLA) on lipid synthesis in BMECs.
View Article and Find Full Text PDFProtective effect of curcumin-loaded zeolitic imidazolate framework-8-based pH-responsive drug delivery system against Staphylococcus aureus infection.
Microb Pathog
January 2025
College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, Jiangsu Province, China; Animal Disease Prevention and Control Center of Ningxia Hui Autonomous Region, Yinchuan 750001, Ningxia, P. R. China. Electronic address:
Mastitis, generally caused by pathogenic microorganisms, is a serious disease in dairy farming. Staphylococcus aureus (S. aureus) is one of the main pathogens that induces mastitis in dairy cows.
View Article and Find Full Text PDFRegulation of LPS-Induced Inflammatory Responses in Bovine Mammary Epithelial Cells via TLR4-Mediated NF-κB and MAPK Signaling Pathways by Lactoferrin.
Life (Basel)
January 2025
College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010010, China.
Lactoferrin (LF), a member of the transferrin family, is widely present in mammalian milk and other secretions, exhibiting anti-inflammatory, antibacterial, and anti-infective properties. Although the biological functions of LF have been extensively studied, there are few reports on its effects and molecular mechanisms concerning bovine mastitis caused by bacterial infection. This study used bovine mammary epithelial cells (BMECs) cultured in vitro as the research model.
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