Trawienie i wchłanianie lipidów w przewodzie pokarmowym przeżuwaczy

• Autorzy: Brzozowska A. , Oprzadek J.

Warianty tytułu

EN

Lipid digestion and absorption in the gastrointestinal tract of ruminants

• Języki publikacji: PL

Abstrakty

EN

Lipids consumed by the ruminants enter the rumen, where they undergo two main processes: the hydrolysis of ester bonds in triglycerides and the hydrogenation of unsaturated bonds. For this reason the composition of fatty acids leaving the rumen is substantially different from the composition of the diet. Fatty acids that enter the small intestine are mainly saturated, mostly palmitic and stearic acids. They are transported to different tissues and organs of the animal, where they may undergo further biochemical transformations. All of these transformations result in significant diversity in fatty acid profiles of animal products, such as milk. This paper presents fatty acid metabolism in the rumen, as it is the most important factor modifying the composition of fatty acids consumed by a ruminant.

Słowa kluczowe

PL

przezuwacze; fizjologia zwierzat; przewod pokarmowy; lipidy; kwasy tluszczowe; metabolizm; zwacz; hydroliza; biouwodornienie; trawienie; wchlanianie

• Wydawca: -
• Czasopismo: Medycyna Weterynaryjna
• Rocznik: 2013
• Tom: 69
• Numer: 11
• Opis fizyczny: s.662-665,rys.,bibliogr.

Twórcy

autor

Brzozowska A.

• Instytut Genetyki i Hodowli Zwierząt, Polska Akademia Nauk, ul. Postępu 36A, Jastrzębiec, 05-552 Magdalenka

autor

Oprzadek J.

• Instytut Genetyki i Hodowli Zwierząt, Polska Akademia Nauk, ul. Postępu 36A, Jastrzębiec, 05-552 Magdalenka

Bibliografia

• 1. AbuGhazaleh A. A., Jenkins T. C.: Disappearance of docosahexaenoic and eicosapentaenoic acids from cultures of mixed ruminal microorganisms. J. Dairy Sci. 2004, 87, 645-651.
• 2. Bauchart D.: Lipid absorption and transport in ruminants. J. Dairy Sci. 1993, 76, 3864-3881.
• 3. Bauman D. E., Griinari J. M.: Nutritional regulation of milk fat synthesis. Ann. Rev. Nutr. 2003, 23, 203-227.
• 4. Bauman D. E., Perfield II J. W., de Veth M. J., Lock A. L.: New perspectives on lipid digestion and metabolism in ruminants. Proc. Cornell Nutr. Conf. 2003, s. 175-189.
• 5. Buccioni A., Decandia M., Minieri S., Molle G., Cabiddu A.: Lipid metabolism in the rumen: New insights on lipolysis and biohydrogenation with an emphasis on the role of endogenous plant factors. Anim. Feed Sci. Tech. 2012, 174, 1-25.
• 6. Chilliard Y., Ferlay A., Doreau M.: Effect of different types of forages, animal fat or marine oils in cow’s diet on milk fat secretion and composition, especially conjugated linoleic acid (CLA) and polyunsaturated fatty acids. Livestock Prod. Sci. 2001, 70, 31-48.
• 7. Cuvelier C., Cabaraux J.-F., Dufrasne I., Istasse L., Hornick J.-L.: Production, digestion et absorption des acides gras chez le ruminant. Ann. Med. Vet. 2005, 149, 49-59.
• 8. Dohme F., Fievez V., Raes K., Demeyer D. I.: Increasing levels of two different fish oils lower ruminal biohydrogenation of eicosapentaenoic and docosahexaenoic acid in vitro. Anim. Res. 2003, 52, 309-320.
• 9. Jenkins T. C.: Lipid metabolism in the rumen. J. Dairy Sci. 1993, 76, 3851-3863.
• 10. Jenkins T. C., Wallace R. J., Moate P. J., Mosley E. E.: Board-Invited Review: Recent advances in biohydrogenation of unsaturated fatty acids within the rumen microbial ecosystem. J. Anim. Sci. 2007, 86, 397-412.
• 11. Kitessa S. M., Gulati S. K., Simos G. C., Ashes J. R., Scott T. W., Fleck E., Wynn P. C.: Supplementation of grazing dairy cows with rumen-protected tuna oil enriches milk fat with n-3 fatty acids without affecting milk production or sensory characteristics. Brit. J. Nutr. 2004, 91, 271-277.
• 12. Lock A. L., Bauman D. E.: Modifying milk fat composition of dairy cows to enhance fatty acids beneficial to human health. Lipids 2004, 39, 1197-1206.
• 13. Mansbridge R. J., Blake J. S.: Nutritional factors affecting the fatty acid composition of bovine milk. Brit. J. Nutr. 1997, 78, S37-S47.
• 14. McConnell C.: The effects of omega-3 fatty acids on milk fat synthesis and composition in dairy cows, M.S. Thesis, Cornell University, Ithaca, NY 2004.
• 15. Mosley E. E., Powell G. L., Riley M. R., Jenkins T. C.: Microbial biohydrogenation of oleic acid to trans isomers in vitro. J. Lipid Res. 2002, 43, 290-296.
• 16. Shingfield K. J., Griinari J. M.: Role of biohydrogenation intermediates in milk fat depression. Eur. J. Lipid Sci. Tech. 2007, 109, 799-816.