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Challenges in enriching milk fat with polyunsaturated fatty acids

Journal of Animal Science and Biotechnology 2016年第3期7卷 290-298页

作者： Jennifer Stamey Lanier benjamin A.corl Phibro Animal Health Corporation TeaneckN JUSA Department of Dairy Science Virginia TechBlacksburgVA 24061-031 SUSA

Milk fatty acid composition is determined by several factors including diet. The milk fatty acid profile of dairy cows is low in polyunsaturated fatty acids, especially those of the n-3 series. Efforts to change and influence fatty acid profile with longer chain polyunsaturated fatty acids have proven challenging. Several barriers prevent easy transfer of dietary polyunsaturated fatty acids to milk fat including rumen biohydrogenation and fatty acid esterification. The potential for cellular uptake and differences in fatty acid incorporation into milk fat might also have an effect, though this has received less research effort. Given physiological impediments to enriching milk fat with polyunsaturated fatty acids, manipulating the genome of the cow might provide a greater increase than diet alone, but this too may be challenged by the physiology of the cow.

关键词： Dairy cow Milk fat Polyunsaturated fatty acids

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Acute effects of rotavirus and malnutrition on intestinal barrier function in neonatal piglets

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World Journal of Gastroenterology 2013年第31期19卷 5094-5102页

作者： Sheila K Jacobi Adam J Moeser Anthony T Blikslager J Marc Rhoads benjamin a corl Robert J Harrell Jack Odle Laboratory of Developmental Nutrition College of Agriculture and Life Sciences North Carolina State University Raleigh NC 27695United States College of Veterinary Medicine North Carolina State University Raleigh NC 27695United States Department of Pediatrics University of Texas Health Science Center at Houston Medical School Houston TX 77030 United States Department of Dairy Science Virginia Poly-technic Institute and State University Blacksburg VA 24061United States

AIM: To investigate the effect of protein-energy malnutrition on intestinal barrier function during rotavirus enteritis in a piglet ***: Newborn piglets were allotted at day 4 of age to the following treatments:(1) full-strength formula(FSF)/noninfected;(2) FSF/rotavirus infected;(3) half-strength formula(HSF)/noninfected;or(4) HSF/rotavirus *** one day of adjustment to the feeding rates,pigs were infected with rotavirus and acute effects on growth and diarrhea were monitored for 3 d and jejunal samples were collected for Ussingchamber ***: Piglets that were malnourished or infected had lower body weights on days 2 and 3 post-infection(P < 0.05).Three days post-infection,marked diarrhea and weight loss were accompanied by sharp reductions in villus height(59%) and lactase activity(91%) and increased crypt depth(21%) in infected compared with non-infected pigs(P < 0.05).Malnutrition also increased crypt depth(21%) compared to full-fed ***:crypt ratio was reduced(67%) with viral *** was a trend for reduction in transepithelial electrical resistance with rotavirus infection and malnutrition(P = 0.1).3H-mannitol flux was significantly increased(50%;P < 0.001) in rotavirus-infected piglets compared to non-infected piglets,but there was no effect of nutritional ***,rotavirus infection reduced localization of the tight junction protein,occludin,in the cell membrane and increased localization in the ***: Overall,malnutrition had no additive effects to rotavirus infection on intestinal barrier function at day 3 post-infection in a neonatal piglet model.

关键词： Rotavirus gastroenteritis Kwashiorkor Occludin Ussing chamber Villus

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