Dynamic Change of Plasma Amino Acid Profiles in Early Weaned Piglets

XIAO Yingping; CHEN Anguo; DAI Bing; CHEN Jinggang; LI Kaifeng; YANG Hua

doi:10.3969/j.issn.1006-267x.2015.12.025

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 12: 3846 - 3853

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.12.025

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Dynamic Change of Plasma Amino Acid Profiles in Early Weaned Piglets

XIAO Yingping ,
CHEN Anguo ,
DAI Bing ,
CHEN Jinggang ,
LI Kaifeng ,
YANG Hua

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1. Institute of Quality and Standard for Agro-Products, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China;
2. College of Animal Sciences, Zhejiang University, Hangzhou 310058, China;
3. College of Animal Science & Technology, Zhejiang A & F University, Hangzhou 311300, China

Received date: 2015-06-25

Online published: 2015-12-14

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Abstract

The time-course of plasma amino acid(AA) following response to early weaning was investigated over a 30 d period in weaned piglets using AA analyzer. Eight 21-day-old "Duroc×Landrace×Large Yorkshire" weaned piglets were selected and their blood samples were collected on days 0, 1, 3, 5, 7, 10, 15, and 30 post-weaning. The results showed as follows:plasma contents of arginine and its immediate precursors(citrulline and ornithine) decreased(P<0.05) from days 0 to 5 post-weaning, and increased from days 7 to 30 post-weaning. Plasma contents of leucine, proline, tyrosine and taurine decreased(P<0.05) on days 1 and 3 post-weaning, and increased to the level of day 0 post-weaning on day 30. Plasma contents of isoleucine, lysine, glycine and serine were the lowest on day 5 post-weaning; plasma contents of histidine, phenylalanine, valine, aspartic acid, cysteine were the lowest on day 10 post-weaning, which then increased thereafter. Plasma content of glutamic acid was significantly higher on days 0, 1, 10 post-weaning than that of the others(P<0.05). Total AA content was significantly decreased from day 1 to day 5 post-weaning(P<0.05), then increased on day 7 and keep constant thereafter with no significant difference to day 30 post-weaning(P>0.05). In score plot of principal component analysis, the profiles of AA were gradually away from the profile of AA on day 0 post-weaning, and then were closed to that, and tended to be stable. On days 3 and 5 post-weaning, the profiles of AA were robustly altered. The pattern of partial least-square discriminant analysis demonstrated that glutamic acid played the most important role in differentiating the profiles of AA at different time points post-weaning. It is concluded that early weaning changes the metabolism of protein and amino acid in the body of piglets, especially on days 3 and 5 post-weaning.

Key words： piglets; early weaning; plasma; amino acid; metabolic profiles

Cite this article

XIAO Yingping , CHEN Anguo , DAI Bing , CHEN Jinggang , LI Kaifeng , YANG Hua . Dynamic Change of Plasma Amino Acid Profiles in Early Weaned Piglets[J]. Chinese Journal of Animal Nutrition, 2015 , 27(12) : 3846 -3853 . DOI: 10.3969/j.issn.1006-267x.2015.12.025

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