Effect of amino acids supply in reduced crude protein diets on performance, efficiency of mammary uptake, and transporter gene expression in lactating sows

Journal of Animal Science
R ManjarinN L Trottier

Abstract

To test the hypothesis that reduction in dietary CP concentration coupled with crystalline AA inclusion increases the efficiency of AA use for milk production, mammary AA arteriovenous concentration differences (A-V), AA transport efficiency (A-V/A × 100), and transcript abundance of AA transporters and milk protein genes were determined in lactating sows fed 1 of 3 diets containing 9.5% (Deficient), 13.5% (Ideal), or 17.5% (Standard) CP, with a similar profile of indispensable and dispensable AA. On d 7 and 18, arterial and mammary venous blood and mammary tissue were sampled postfeeding. Transcript abundance of AA transporters b(0,+)AT (SLC7A9), y(+)LAT2 (SLC7A6), ATB(0,+) (SLC6A14), CAT-1 (SLC7A1), and CAT-2b (SLC7A2) and milk protein β-casein (CSN2) and LALBA (α-lactalbumin) were determined using reverse transcription quantitative PCR. Piglet ADG increased curvilinearly (linear and quadratic, P < 0.03) with increasing percent CP from Deficient to Standard. On d 7, Lys and Arg A-V and transport efficiency increased quadratically (P < 0.05) with increasing percent CP. On d 18, Lys A-V tended to increase (linear, P = 0.08) with increasing percent CP. Increasing CP increased Ile and Val A-V on d 7 (linear, P = 0.05 and P = 0.08...Continue Reading

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Citations

Sep 10, 2014·Amino Acids·Rodrigo ManjarinNathalie L Trottier
May 18, 2016·Journal of Animal Physiology and Animal Nutrition·J Álvarez-RodríguezD Babot
Apr 13, 2018·Journal of Animal Science and Biotechnology·Fang ChenWutai Guan
Dec 8, 2015·Journal of Animal Science·L HuberN L Trottier
Apr 2, 2018·Journal of Dairy Science·John P CantJohn Doelman
Nov 1, 2018·Journal of Animal Science and Biotechnology·Shihai ZhangWutai Guan
Sep 11, 2019·Journal of Animal Science·Camilla K HojgaardPeter K Theil

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